{"id":9610,"date":"2023-11-28T09:34:04","date_gmt":"2023-11-28T08:34:04","guid":{"rendered":"https:\/\/alara-group.fr\/?p=9610"},"modified":"2024-06-18T14:21:02","modified_gmt":"2024-06-18T12:21:02","slug":"study-jfr-dgmp-rsna","status":"publish","type":"post","link":"https:\/\/alara-group.fr\/en\/study-jfr-dgmp-rsna\/","title":{"rendered":"[PUBLICATION] Multicenter study of organ-at-risk protection tools in CT scanning: radiation protection and image quality"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"9610\" class=\"elementor elementor-9610 elementor-9608\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c62b14a elementor-section-height-min-height elementor-section-boxed elementor-section-height-default elementor-section-items-middle\" data-id=\"c62b14a\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-120051a\" data-id=\"120051a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-57fa6d5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"57fa6d5\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4aabde6\" data-id=\"4aabde6\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ed15c5e elementor-align-left elementor-widget elementor-widget-post-info\" data-id=\"ed15c5e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-5eb95cd\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/alara-group.fr\/en\/category\/publication-en\/\" class=\"elementor-post-info__terms-list-item\">Publication<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-758c07a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"758c07a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-95647c1\" data-id=\"95647c1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e844021 elementor-widget elementor-widget-elementskit-heading\" data-id=\"e844021\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"elementskit-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" ><div class=\"ekit-heading elementskit-section-title-wraper text_left   ekit_heading_tablet-   ekit_heading_mobile-\"><h2 class=\"ekit-heading--title elementskit-section-title \">[PUBLICATION] Multicenter study of organ-at-risk protection tools in CT scanning: radiation protection and image quality<\/h2><div class=\"ekit_heading_separetor_wraper ekit_heading_elementskit-border-divider ekit-dotted\"><div class=\"elementskit-border-divider ekit-dotted\"><\/div><\/div>\t\t\t\t<div class='ekit-heading__description'>\n\t\t\t\t\t<p>Presented at JFR, DGMP and RSNA, discover the summary of this work below.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-3cb0f25 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3cb0f25\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-089b3ca\" data-id=\"089b3ca\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d8a7e29 elementor-widget elementor-widget-text-editor\" data-id=\"d8a7e29\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Introduction<\/strong> :<\/p>\n<p>CT scans accounted for 12.8% of all imaging examinations conducted in 2017. However, these scans represented more than 70% of the collective effective dose. To reduce patient exposure, manufacturers have implemented several dose optimization tools. Among these techniques, we can mention organ-based tube current modulation (OBTCM) as ODM, OEM and X-CARE, which supposed to reduce the dose on the anterior face of the patients. Nevertheless, the only available dose indicators (CTDI, DLP) do not allow to study the functioning of these tools. Thus, the objective of this study was to assess the relevance of the organ dose protection tools proposed by each multi-slice CT scanner manufacturer, by estimating their impact in terms of dosimetry and image quality, specifically for head examinations.     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-97f2e1f elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"97f2e1f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-1706150\" data-id=\"1706150\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5e04f15 elementor-widget elementor-widget-text-editor\" data-id=\"5e04f15\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Material &amp; Method<\/strong> :<\/p>\n<p>Five CT scanners installed in four radiology services were evaluated: <span style=\"letter-spacing: 0.3px;\">Siemens Somatom Go Top, GE (Revolution CT and Revolution Maxima), Canon (Aquilion <\/span> <span style=\"letter-spacing: 0.3px;\">Genesis, and Aquilion Prime). Measurements were performed using two head protocols on  <\/span><span style=\"letter-spacing: 0.3px;\">a HEAD16 phantom (16 cm diameter, PMMA): a &#8220;standard&#8221; protocol to compare the devices <\/span><span style=\"letter-spacing: 0.3px;\">with each other and a &#8220;clinical&#8221; protocol used in routine practice. To quantify the dose reduction  <\/span><span style=\"letter-spacing: 0.3px;\">obtained using the OBTCM tools, the scintillating fiber detector <\/span><span style=\"letter-spacing: 0.3px;\">IVInomad, was placed on the inner part of the gantry at 16 measurement positions, placed all around the <\/span> <span style=\"letter-spacing: 0.3px;\">gantry (see Figure 1). Image quality was evaluated using standard metrics (SD, SNR, NPS)  <\/span><span style=\"letter-spacing: 0.3px;\">on the HEAD16 phantom images on four regions of interest, positioned in pairs <\/span><span style=\"letter-spacing: 0.3px;\">respectively on the anterior and posterior parts of the phantom. Statistical analysis was  <\/span><span style=\"letter-spacing: 0.3px;\">performed (Wilcoxon test, Bland-Altman) on the measurements obtained with and without the OBTCM tools <\/span><span style=\"letter-spacing: 0.3px;\">to evaluate the significance of<\/span> <span style=\"letter-spacing: 0.3px;\">image quality differences.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-de97b89\" data-id=\"de97b89\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-94f459d elementor-widget elementor-widget-image\" data-id=\"94f459d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"743\" height=\"720\" src=\"https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure1-1.jpg\" class=\"attachment-large size-large wp-image-9657\" alt=\"\" srcset=\"https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure1-1.jpg 743w, https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure1-1-300x291.jpg 300w\" sizes=\"100vw\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c0ae316 elementor-widget elementor-widget-text-editor\" data-id=\"c0ae316\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 1: Schema of the dose measurement protocol. Dots represent the 16 measuring points using the IVInomad detector. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a7293b elementor-widget elementor-widget-text-editor\" data-id=\"4a7293b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Results:<\/b><\/p>\n<p>As it is shown in Figure 2, the dose on the anterior face of the patient is reduced by <span style=\"letter-spacing: 0.3px;\">10.9% to 73.8% depending on the protocol and scanner used. The dose on the posterior face remains  <\/span><span style=\"letter-spacing: 0.3px;\">unchanged on GE and Canon scanners. However, on Siemens CT scanner, the dose on the posterior face  <\/span><span style=\"letter-spacing: 0.3px;\">increases by approximately 39%. The noise (SD) increases by 2.4% to 10.4% depending on the  <\/span><span style=\"letter-spacing: 0.3px;\">scanner and protocol studied. In absolute terms, this corresponds to a maximum increase of 0.5 HU.  <\/span><span style=\"letter-spacing: 0.3px;\">Similarly, the SNR decreases between 2.6% and 9.6%, resulting in an absolute maximum decrease <\/span><span style=\"letter-spacing: 0.3px;\">of 2.5 HU. These differences are considered statistically significant (p-value &lt; 0.05).  <\/span><span style=\"letter-spacing: 0.3px;\">The analysis of the NPS showed that the noise texture was not affected.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc2d7c7 elementor-widget elementor-widget-image\" data-id=\"dc2d7c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"950\" height=\"365\" src=\"https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure2-1-1024x393.jpg\" class=\"attachment-large size-large wp-image-9672\" alt=\"\" srcset=\"https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure2-1-1024x393.jpg 1024w, https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure2-1-300x115.jpg 300w, https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure2-1-768x295.jpg 768w, https:\/\/alara-group.fr\/wp-content\/uploads\/2023\/10\/Figure2-1.jpg 1280w\" sizes=\"100vw\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4128dde elementor-widget elementor-widget-text-editor\" data-id=\"4128dde\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Figure 2: Dose reduction rates measured in the five CT scanners using: the standard protocol (a) and the routine protocol (b). The dotted line represents a null difference between doses measured with and without OBTCM. (A): Siemens Somatom Go Top. (B): GE Revolution CT. (C): GE Revolution Maxima. (D): Canon Aquilion Genesis. (E): Canon Aquilion        <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7be10f elementor-widget elementor-widget-text-editor\" data-id=\"e7be10f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Conclusion:<\/b><\/p>\n<p>The OBTCM tools significantly reduce <span style=\"letter-spacing: 0.3px;\">the dose on the patient&#8217;s anterior face. In the case of this specific study on  <\/span><span style=\"letter-spacing: 0.3px;\">head examinations, these tools reduce the exposure to the patient&#8217;s anterior face by up to <\/span><span style=\"letter-spacing: 0.3px;\">73.8%, depending on the CT scanner and the protocol used. However, an impact on image quality is  <\/span><span style=\"letter-spacing: 0.3px;\">observed, with a maximum increase of 0.5 HU in standard deviation and a maximum decrease of 2.5 HU in SNR. <\/span><span style=\"letter-spacing: 0.3px;\">maximum. . <\/span><span style=\"letter-spacing: 0.3px;\">.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da364f5 elementor-widget elementor-widget-heading\" data-id=\"da364f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Share this article<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1355a2c elementor-grid-2 elementor-share-buttons--skin-flat elementor-share-buttons--shape-circle elementor-grid-mobile-1 elementor-share-buttons--view-icon-text 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study&#8221;.<\/p>\n","protected":false},"author":3,"featured_media":9654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-9610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publication-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[PUBLICATION] Multicenter study of organ-at-risk protection tools in CT scanning[PUBLICATION] Multicenter study of organ-at-risk protection tools in CT scanning: radiation protection and image quality<\/title>\n<meta name=\"description\" content=\"Discover the summary : &quot;Multicentric characterization of organ-based tube current modulation in head computed tomography: a dosimetric and image quality study&quot;\" \/>\n<meta name=\"robots\" content=\"index, follow, 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