Setting the stage for conformity-assessment standards for implantable devices, markers, and related products used in patients undergoing diagnostic imaging or radiation therapy.
Implantable devices increasingly live in two worlds at once. A device is implanted in a patient — and then that same patient undergoes CT and MR imaging for surveillance, or radiation therapy for treatment. How the device behaves in those environments is now part of how the device performs.
Composite materials — such as carbon-fiber-reinforced polymers — have opened a new design space here. Radiolucent composite implants can reduce imaging artifact, improving visualization of the anatomy around the device in follow-up imaging. Radiotherapy-compatible devices can reduce the dose perturbation that dense metallic implants introduce into a treatment field. For patients whose care depends on seeing clearly through an implant, or treating accurately around one, these properties are clinical performance — not conveniences.
The question facilities, clinicians, and manufacturers need answered is deceptively simple: how does this device actually perform in the imaging and treatment context it will live in — and who has verified that?
Well-established standards already govern what these devices are made of. Material specifications, biocompatibility, and mechanical test methods are owned by other accredited developers — and HWASC's work treats them as normative inputs, not territory to duplicate.
What no standard currently provides is conformity assessment of the device's performance in its clinical use context:
Radiological performanceHow the device behaves in the radiation environment — attenuation, scatter, and dose perturbation in a therapy field.
Imaging performanceWhat the device does to diagnostic image quality — artifact, visualization of adjacent anatomy, and compatibility across imaging modalities.
Post-irradiation performanceWhether the device still performs as intended after therapeutic radiation exposure — the question material data alone cannot answer in context.
A material can meet every applicable specification and a device can still perform poorly in a treatment field. Composition tells you what a device is; use-context qualification tells you what it does — in the patient, in the scanner, in the beam.
From the third area of our accredited scope, in support of our competency and conformity-assessment activities.
Conformity-assessment criteria and use-context performance qualification for implantable devices, markers, and related products used in, or intended for use in, patients undergoing diagnostic imaging or radiation therapy — including radiolucent and radiotherapy-compatible devices — addressing their radiological, imaging, and post-irradiation performance in the clinical use context, referencing existing material and test-method standards as normative inputs.
This scope excludes material composition and base material properties, which remain within the scope of other accredited developers. HWASC's standards will reference those material and test-method standards as normative inputs — building on them, never competing with them.
Use-context device qualification is not a standalone effort. It exists in support of HWASC's competency and conformity-assessment activities: the same framework that certifies the competency of non-hospital personnel and the conformity of supplier organizations extends naturally to the products those personnel support — across procurement, value analysis, product-use documentation, and post-procedure billing.
One commission, one conformity-assessment architecture: competent people, conforming organizations, and qualified products — verifiable at every link in the chain.
A Project Initiation Notification for this scope area is in preparation. To be notified when it is announced, or to express early interest in the consensus body, contact info@hwasc.org.
Manufacturers, imaging and radiation oncology professionals, medical physicists, materials experts, clinicians, and healthcare organizations — this work needs your expertise.