An X-ray is an imaging examination using ionizing radiation that can be used in clinical trials as a protocol-specified examination measure. It provides, for example, information on bones, thorax, or disease-related changes. As a study-related examination, it must be scientifically justified, safely planned, and traceably documented.<\/p>\n
The protocol determines whether and when X-rays take place. It describes the purpose, examination time points, body region to be examined, permissible deviations, and the use of the findings. An image can serve for eligibility screening, safety monitoring, or the assessment of a pre-specified clinical characteristic. The examination is then part of the study-specific procedure and not merely an incidental routine service.<\/p>\n
The study design must plan data collection so that the results are meaningful for the research question and unnecessary burdens are avoided. This includes clear requirements for technical execution, identification of images, transmission to an evaluation center, and the handling of missing or uninterpretable images. Relevant source documents must traceably substantiate the examination and the resulting data.<\/p>\n
X-ray radiation causes medical exposure and is therefore a study-related risk insofar as it exceeds standard care or is performed solely for research purposes. Directive 2013\/59\/EURATOM requires a sufficient net benefit for medical exposures, weighing the potential diagnostic or therapeutic benefit against individual detriment. For medical or biomedical research involving exposure, voluntary participation, information about exposure risks, and, if applicable, dose constraints for individuals without expected direct medical benefit are relevant.<\/p>\n
For the clinical trial, this means: the justification of the X-ray belongs in the protocol and in the patient information for informed consent. The examination must not be performed solely because it is technically available. The tasks of the referring person, the performing specialist, and the investigator site are additionally governed by applicable national radiation protection law. The study must also ensure that only qualified entities are active and that the planned examination does not undermine the risk assessment of the participants.<\/p>\n
If the X-ray is decisive for a study assessment, image acquisition, transmission, and archiving must be standardized. Uniform specifications on projection, labeling, time windows, and quality control reduce avoidable differences between investigator sites. With electronic transmission, data integrity, access rights, audit trail, and protection of blinding must be considered. The association of image and study participant must be correct and at the same time compliant with data protection.<\/p>\n
A central blinded reading can be used if a consistent and treatment-independent assessment is required. The reading persons then receive the images according to the rules specified in the protocol, without information that could influence the assessment. Discrepant assessments, uninterpretable images, and corrections must be handled according to pre-described procedures. Central reading increases uniformity, but does not replace the clinical responsibility of the investigator site team.<\/p>\n
An X-ray is a specific examination method. An imaging endpoint, on the other hand, is the pre-defined outcome measure that can be derived from image data, such as a change in a finding at a specific time point. An endpoint can be based on X-rays, but does not have to be: other imaging methods can also be used for this.<\/p>\n
The distinction is important for planning. The protocol must specify, on the one hand, how the image is acquired technically and safely, and, on the other hand, how the image information for an endpoint is collected, assessed in a blinded manner, and analyzed. The mere performance of an X-ray does not yet define an imaging endpoint. Likewise, an image can serve exclusively for safety or eligibility screening.<\/p>\n
X-rays simultaneously affect participant protection, process planning, and data quality. Risks arise in particular from unjustified additional exposure, inconsistent acquisition, and unclear evaluation pathways. A trial must therefore link justification, consent, technical instructions, time windows, and responsibilities so that both the exposure and the image data remain controllable.<\/p>\n
Full-service CROs such as Mediconomics support the planning of imaging examinations through protocol and consent documents, coordination with investigator sites and imaging service providers, training on image acquisition, as well as the organization of a central blinded reading. They accompany data transmission, quality controls, deviation management, and documentation for monitoring and inspections.<\/p>\n
The dose documentation supports the subsequent verification of exposure.<\/p>\n
Is every X-ray in a study an endpoint?<\/strong><\/p>\n No. It is initially an examination method. Only a pre-defined evaluation can make it the basis of an imaging endpoint.<\/p>\n Must the informed consent address radiation exposure?<\/strong><\/p>\n For study-related medical exposure, the relevant risks must be understandably explained. The specific content depends on the protocol and applicable law.<\/p>\n Why is central blinded reading performed?<\/strong><\/p>\n A central blinded reading is intended to separate evaluation differences and potential knowledge of the treatment arm from the assessment.<\/p>\n An X-ray is an imaging examination using ionizing radiation that can be used in clinical trials as a protocol-specified examination measure. It provides, for example, information on bones, thorax, or disease-related changes. As a study-related examination, it must be scientifically justified, safely planned, and traceably documented. Role in the protocol The protocol determines whether and […]<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"glossary-cat":[],"class_list":["post-6885","glossary","type-glossary","status-publish","hentry"],"acf":[],"related_terms":"","external_url":"","internal_reference_id":"","_links":{"self":[{"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/glossary\/6885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/types\/glossary"}],"author":[{"embeddable":true,"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/users\/10"}],"version-history":[{"count":2,"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/glossary\/6885\/revisions"}],"predecessor-version":[{"id":7476,"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/glossary\/6885\/revisions\/7476"}],"wp:attachment":[{"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/media?parent=6885"}],"wp:term":[{"taxonomy":"glossary-cat","embeddable":true,"href":"https:\/\/mediconomics.com\/en\/wp-json\/wp\/v2\/glossary-cat?post=6885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Regulatory references<\/h2>\n
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