{"id":2851,"date":"2022-12-20T13:26:02","date_gmt":"2022-12-20T11:26:02","guid":{"rendered":"https:\/\/www.vsl.nl\/ionising-radiation\/"},"modified":"2026-03-17T15:27:59","modified_gmt":"2026-03-17T13:27:59","slug":"ionising-radiation","status":"publish","type":"page","link":"https:\/\/www.vsl.nl\/en\/areas-of-expertise\/ionising-radiation\/","title":{"rendered":"Ionising radiation"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_section full_width=&#8221;stretch_row&#8221; content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1668958701757{background-image: url(https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Lab-Foto-WEB-41.jpg?id=2242) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}&#8221; el_class=&#8221;main_header gradient_header dg-position-realtive&#8221;][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;middle&#8221; el_class=&#8221;dg-header&#8211;small&#8221;][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1668433741708{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221; el_class=&#8221;text-white&#8221;]<\/p>\n<h1>Ionising radiation metrology<\/h1>\n<p>Exposure to large amounts of radiation is harmful to humans and animals. Fortunately, radiation equipment is becoming more and more sophisticated. Innovations are only made possible by accurate radiation measurements and correct interpretation of the measurement data.<br \/>\n[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][\/vc_section][vc_section full_width=&#8221;stretch_row&#8221; disable_element=&#8221;yes&#8221; el_class=&#8221;brand_element_small dg-padding-small&#8221; css=&#8221;.vc_custom_1668433747284{background-color: #fafafa !important;}&#8221;][vc_row][vc_column el_class=&#8221;dg-padding-none&#8221;][vc_btn title=&#8221;Introduction&#8221; style=&#8221;flat&#8221; shape=&#8221;square&#8221; size=&#8221;sm&#8221; css=&#8221;.vc_custom_1666596187053{margin-bottom: 0px !important;border-radius: 5px !important;}&#8221; el_class=&#8221;page_btn page_btn_active&#8221; link=&#8221;url:http%3A%2F%2Fwww.vsl.nl%2Fvakgebieden%2Fioniserende-straling%2F|title:Introductie%20ioniserende-straling|&#8221;][vc_btn title=&#8221;Maatwerk&#8221; style=&#8221;flat&#8221; shape=&#8221;square&#8221; size=&#8221;sm&#8221; css=&#8221;.vc_custom_1666338347652{margin-bottom: 0px !important;margin-left: 25px !important;border-radius: 5px !important;}&#8221; el_class=&#8221;page_btn&#8221; link=&#8221;url:http%3A%2F%2Fwww.vsl.nl%2Fvakgebieden%2Fioniserende-straling%2Fmaatwerk|title:Maatwerk|&#8221;][vc_btn title=&#8221;Calibration&#8221; style=&#8221;flat&#8221; shape=&#8221;square&#8221; size=&#8221;sm&#8221; css=&#8221;.vc_custom_1666338430804{margin-bottom: 0px !important;margin-left: 25px !important;border-radius: 5px !important;}&#8221; el_class=&#8221;page_btn&#8221; link=&#8221;url:https%3A%2F%2Fwww.vsl.nl%2Fvakgebieden%2Fioniserende-straling%2Fkalibratie|title:Kalibratie%20ioniserende-straling|&#8221;][vc_btn title=&#8221;Proficiency Testing&#8221; style=&#8221;flat&#8221; shape=&#8221;square&#8221; size=&#8221;sm&#8221; css=&#8221;.vc_custom_1666338453060{margin-bottom: 0px !important;margin-left: 25px !important;border-radius: 5px !important;}&#8221; el_class=&#8221;page_btn&#8221; link=&#8221;url:https%3A%2F%2Fwww.vsl.nl%2Fvakgebieden%2Fioniserende-straling%2Fringvergelijkingen|title:Ringvergelijkingen%20ioniserende-straling|&#8221;][vc_btn title=&#8221;Training&#8221; style=&#8221;flat&#8221; shape=&#8221;square&#8221; size=&#8221;sm&#8221; css=&#8221;.vc_custom_1666596173601{margin-bottom: 0px !important;margin-left: 25px !important;border-radius: 5px !important;}&#8221; el_class=&#8221;page_btn&#8221; link=&#8221;url:https%3A%2F%2Fwww.vsl.nl%2Fvakgebieden%2Fioniserende-straling%2Ftraining|title:Training%20ioniserende-straling|&#8221;][\/vc_column][\/vc_row][\/vc_section][vc_section el_class=&#8221;dg-padding-mid brand_element_small&#8221;][vc_row][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1669131700488{padding-right: 10% !important;}&#8221;]<\/p>\n<p class=\"header_subtext\">Introduction<\/p>\n<h2>Ionising radiation<\/h2>\n<p>Exposure to large amounts of radiation is harmful to humans. Sometimes this happens accidentally, as in the Fukushima disaster. Conversely, in radiotherapy for cancer treatment, ionising radiation is used intentionally to destroy malignant cells (tumours). Measuring the amount of radiation delivered (dosimetry) and its precise location are two essential factors for successful treatment.<\/p>\n<p>Accurate measurements are crucial to both external (teletherapy) and internal radiation (brachytherapy), Radiation equipment, such as linear accelerators combined with an MRI scanner, is becoming increasingly sophisticated, with proton radiation being applied instead of the traditional photon radiation treatment. VSL is developing measurement methods to determine with increasing accuracy the amount and distribution of radiation delivered by this new radiation equipment.[\/vc_column_text][vc_column_text]<\/p>\n<h2>VSL and ionising radiation<\/h2>\n<p>VSL provides various dosimetry services to hospitals, the medical industry, dosimetry companies, producers of radiation equipment and detectors, as well as to parties that work with radiation, such as nuclear power plants. We are also working on several research projects at a European level.<\/p>\n<p>VSL specialists sit on several committees, including the Netherlands Commission on Radiation Dosimetry (<a href=\"https:\/\/radiationdosimetry.org\/\" target=\"_blank\" rel=\"noopener\">NCS<\/a>), where they advise on the measurement of ionising radiation.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243; css=&#8221;.vc_custom_1757065033460{margin-top: 0px !important;margin-right: 0px !important;margin-bottom: 0px !important;margin-left: 0px !important;padding-top: 0px !important;padding-right: 0px !important;padding-left: 0px !important;}&#8221; el_class=&#8221;full_width_responsive tablet_expert&#8221;]<div class=\"templatera_shortcode\"><section class=\"vc_section\"><div class=\"vc_row wpb_row vc_row-fluid full_width_responsive\"><div class=\"dg-specialist--inner dg-padding--none-inner wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner vc_custom_1757057705883\"><div class=\"wpb_wrapper\">\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_left  vc_custom_1765290004835  dg-expert--image\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"500\" height=\"333\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/12\/Marcel-van-Est-portret-blauw.jpg\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Marcel van Est portret blauw\" data-srcset=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/12\/Marcel-van-Est-portret-blauw.jpg 500w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/12\/Marcel-van-Est-portret-blauw-300x200.jpg 300w\" data-sizes=\"(max-width: 500px) 100vw, 500px\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/marcel-van-est-portret-blauw\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 500px; --smush-placeholder-aspect-ratio: 500\/333;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<div class=\"vc_row wpb_row vc_inner vc_row-fluid dg-padding--square vc_custom_1757057909078 vc_row-o-equal-height vc_row-o-content-middle vc_row-flex\"><div class=\"dg-padding--none-inner dg-expert--inner-content wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner vc_custom_1757058090823\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element  vc_custom_1757058388973 dg-expert--content-header\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h3><strong>Meer weten over onze diensten? <\/strong><\/h3>\n<p>Onze experts staan voor je klaar.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element  vc_custom_1761214255777 sector_specialist\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><b>Marcel van Est<\/b><br \/>\nSenior sales engineer<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_raw_code wpb_raw_html wpb_content_element vc_custom_1761214276121\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<i class=\"far fa-envelope green_icon\"><\/i> <a class=\"custom_link_specialist\" href=\"mailto:vsl@vsl.nl\"> vsl@vsl.nl<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section>\r\n<\/div>[\/vc_column][\/vc_row][\/vc_section][vc_section full_width=&#8221;stretch_row&#8221; el_class=&#8221;dg-padding-mid brand_element_small&#8221; css=&#8221;.vc_custom_1669123260581{background-color: #fafafa !important;}&#8221;][vc_row el_class=&#8221;dg-index-fix dg-padding-small-top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;dg-padding-none full_width_responsive&#8221;][vc_column_text]<\/p>\n<p class=\"header_subtext\">Custom services<\/p>\n<h2>Custom ionising radiation metrology<\/h2>\n<p>VSL has specialised knowledge of and experience in ionising radiation as well as in its measurement and the interpretation of measurement data. Governments, hospitals, research institutes and manufacturers regularly ask our help with specific applications. Our services in this regard include:<\/p>\n<ul>\n<li><strong>Advice on and set-up of measurement systems.<\/strong> From the design of measurement set-ups and ensuring traceability to the set-up and preparation for ISO certification.<\/li>\n<li><strong>Development and validation of measurement methods.<\/strong> This results in a report describing the measurement and validation method, including the determination of measurement uncertainty.<\/li>\n<li><strong>Advice with regard to ISO certification.<\/strong> A measurement system must meet several requirements in order to obtain accreditation. VSL verifies the measurement method and measurement data, optimises traceability and calculates the uncertainty budget.<\/li>\n<li><strong>Reducing measurement uncertainty<\/strong> and preparing the uncertainty budget.<\/li>\n<li><strong>Audits of calibration labs.<\/strong> These are carried out on the instructions of the Dutch Accreditation Council.<\/li>\n<\/ul>\n<p>Every situation is unique. Do you need advice or would you like to know what we can do for you? Don&#8217;t hesitate to contact us.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][\/vc_section][vc_section el_class=&#8221;dg-padding-mid brand_element_small&#8221;][vc_row el_class=&#8221;dg-index-fix dg-padding-small-top&#8221;][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;dg-padding-none full_width_responsive&#8221;][vc_column_text]<\/p>\n<p class=\"header_subtext\">Calibrations<\/p>\n<h2>Ionising radiation calibration services<\/h2>\n<p>Accurate radiation measurements are essential to ensure effective radiotherapy treatments and patient safety in radiological diagnostics. VSL ensures traceability to standards in radiotherapy (teletherapy and brachytherapy) by calibrating ionisation chambers for Co-60, Cs-137 and X-ray beams. In addition, we calibrate well-type ionisation chambers for Ir-192 sources.<\/p>\n<p>As regards radiological applications, we calibrate KAP meters, KLP meters and ionisation chambers for a wide range of X-ray qualities. We adhere to the ISO, IEC, NEN and NCS standards.[\/vc_column_text][vc_column_text]<\/p>\n<h2>Keeping radiation environments safe<\/h2>\n<p>Radiation levels also need to be accurately measured to ensure the safety of employees in such environments. Quality can be guaranteed by means of regular calibration of the radiation source or measurement equipment. Regular calibration is also a requirement for ISO certification and FDA approval.<br \/>\n[\/vc_column_text][vc_column_text]<\/p>\n<h2>On-site calibration of radiation sources<\/h2>\n<p>In addition to performing calibrations in its own laboratory, VSL offers on-site calibration of radiation sources. This way, we provide as many high-quality sources as possible.<br \/>\n[\/vc_column_text][\/vc_column][\/vc_row][\/vc_section][vc_row][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1773753815474{padding-right: 10% !important;}&#8221; el_class=&#8221;dosimetrie-audits&#8221;]<\/p>\n<h2>Dosimetry audits<\/h2>\n<p>VSL performs high\u2011quality dosimetry audits to ensure the accuracy of dose delivery in radiotherapy. A key component of this service is the Postal Beam Output Audit (BOA) for Radiotherapy: an independent and internationally recognised assessment of therapeutic photon beam output.<\/p>\n<p>This postal audit enables radiotherapy centres to verify, quickly, reliably, and without an on\u2011site visit, whether their measured beam output falls within the required tolerances. The BOA audit strengthens quality assurance processes and supports safe, consistent, and accurate patient treatments.<\/p>\n<p><a href=\"https:\/\/www.vsl.nl\/project\/postal-beam-output-audit-boa-for-radiotherapy\/\">Click here for more information.<\/a>[\/vc_column_text][vc_column_text css=&#8221;.vc_custom_1671446570044{padding-right: 10% !important;}&#8221;]<\/p>\n<h2>Consultancy<\/h2>\n<p>We support and advise manufacturers and end users with regard to questions, enabling them to improve measurement and inspection methods to optimise the quality of their processes and products.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243; css=&#8221;.vc_custom_1658406431703{margin-top: 0px !important;margin-right: 0px !important;margin-bottom: 0px !important;margin-left: 0px !important;padding-top: 0px !important;padding-right: 0px !important;padding-left: 0px !important;}&#8221; el_class=&#8221;full_width_responsive&#8221;][\/vc_column][\/vc_row][vc_section full_width=&#8221;stretch_row&#8221; el_class=&#8221;dg-padding-mid&#8221; css=&#8221;.vc_custom_1648640322721{background-color: #fafafa !important;}&#8221;][vc_row][vc_column width=&#8221;1\/6&#8243;][\/vc_column][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;dg-padding-none full_width_responsive&#8221;][vc_column_text]<\/p>\n<h2 style=\"text-align: center;\">Our areas of expertise<\/h2>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row el_class=&#8221;dg-padding-small-top&#8221;][vc_column el_class=&#8221;dg-padding-none&#8221;]<div class=\"templatera_shortcode\"><style type=\"text\/css\" data-type=\"vc_shortcodes-custom-css\">.vc_custom_1669633605353{margin-bottom: 10px !important;}.vc_custom_1669633627553{margin-bottom: 10px !important;}.vc_custom_1669633635950{margin-bottom: 10px !important;}.vc_custom_1669633653507{margin-bottom: 10px !important;}.vc_custom_1669633664911{margin-bottom: 10px !important;}.vc_custom_1669633673364{margin-bottom: 10px !important;}.vc_custom_1669633682893{margin-bottom: 10px !important;}.vc_custom_1669633691703{margin-bottom: 10px !important;}.vc_custom_1669633708590{margin-bottom: 10px !important;}.vc_custom_1669633727119{margin-bottom: 10px !important;}.vc_custom_1669633735268{margin-bottom: 10px !important;}.vc_custom_1746716719278{margin-bottom: 10px !important;}<\/style><section class=\"vc_section\"><div class=\"vc_row wpb_row vc_row-fluid dg-index-fix vc_row-o-equal-height vc_row-o-content-top vc_row-flex\"><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/elektriciteit\/\" title=\"Elektriciteit\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633605353  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Electricity.png\" class=\"vc_single_image-img attachment-thumbnail lazyload\" alt=\"\" title=\"Electricity\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/electricity\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Elektriciteit<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/geometrie\/\" title=\"Geometrie\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633627553  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Geometry.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Geometry\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/geometry\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Geometrie<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/druk\/\" title=\"Druk\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633635950  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Pressure.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Pressure\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/pressure\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Druk<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/temperatuur\/\" title=\"Temperatuur\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633653507  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Temperature.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Temperature\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/temperature\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Temperatuur<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/optica\/\" title=\"Licht\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633664911  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Optica.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Optica\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/optica\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Optica<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/chemie\/\" title=\"Chemie\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633673364  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Chemistry.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Chemistry\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/chemistry\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Chemie<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><\/div><div class=\"vc_row wpb_row vc_row-fluid dg-padding-small-top dg-index-fix vc_row-o-equal-height vc_row-o-content-top vc_row-flex\"><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/ioniserende-straling\/\" title=\"Ioniserende straling\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633682893  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Radiation.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Radiation\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/radiation\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Ioniserende<\/strong><br \/>\n<strong>straling<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/massa\/\" title=\"Massa\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633691703  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Mass.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Mass\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/mass\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Massa<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/stroming\/\" title=\"Stroming\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633708590  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Flow.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Flow\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/flow\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Stroming<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/tijd-frequentie\/\" title=\"Tijd &amp; Frequentie\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633727119  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Time.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Time\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/time-2\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><strong>Tijd &amp;<br \/>\nfrequentie<\/strong><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/vakgebieden\/vocht\/\" title=\"Vocht\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1669633735268  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"100\" height=\"100\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Humidity.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Humidity\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/humidity\/\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 100px; --smush-placeholder-aspect-ratio: 100\/100;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Vocht<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><div class=\"markets_icon wpb_column vc_column_container vc_col-sm-2\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"ult-content-box-container \" >\t<a class=\"ult-content-box-anchor\" href=\"https:\/\/www.vsl.nl\/diensten\/datawetenschap\/\" >\t\t<div class=\"ult-content-box\" style=\"box-shadow: px px px px none;-webkit-transition: all 700ms ease;-moz-transition: all 700ms ease;-ms-transition: all 700ms ease;-o-transition: all 700ms ease;transition: all 700ms ease;\"  data-hover_box_shadow=\"none\"    >\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center  vc_custom_1746716719278  sector_icon\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"1511\" height=\"1607\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR.png\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"datascience diensten HR\" data-srcset=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR.png 1511w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR-282x300.png 282w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR-963x1024.png 963w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR-768x817.png 768w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/datascience-diensten-HR-1444x1536.png 1444w\" data-sizes=\"(max-width: 1511px) 100vw, 1511px\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/?attachment_id=23302\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1511px; --smush-placeholder-aspect-ratio: 1511\/1607;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element \" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><b>Datawetenschap<\/b><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\t\t<\/div>\t<\/a><\/div><\/div><\/div><\/div><\/div><\/section><\/div>[\/vc_column][\/vc_row][\/vc_section]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Ionising radiation metrology Exposure to large amounts of radiation is harmful to humans and animals. Fortunately, radiation equipment is becoming more and more sophisticated. Innovations are only made possible by accurate radiation measurements and correct interpretation of the measurement data. Introduction Ionising radiation Exposure to large amounts of radiation is harmful to humans. Sometimes this&hellip;<\/p>\n","protected":false},"author":2,"featured_media":2243,"parent":2912,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[79,122],"tags":[],"class_list":["post-2851","page","type-page","status-publish","has-post-thumbnail","hentry","category-health-and-environment","category-security-and-resilience","description-off"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>VSL | Metrology for ionizing radiation<\/title>\n<meta name=\"description\" content=\"High-quality metrology services around ionizing radiation. 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