This Prospective Observational Study Aims to Evaluate the Capability of Ultra-high-resolution Photon-counting CT Angiography (UHR PCD-CTA) for Noninvasive Evaluation of Intracranial Venous Sinus Stents. The Study Will Compare Image Quality, Stent Visualization, Metal-related Artifacts, and Diagnosti
This prospective observational study aims to evaluate the effectiveness of ultra-high-resolution photon-counting CT angiography (UHR PCD-CTA) for noninvasive assessment of intracranial venous sinus stents. The study will compare image quality, stent visualization, metal-related artifacts, and diagnostic accuracy between PCD-CTA and conventional energy-integrating detector CT angiography (EID-CTA).
Eligibility
Sex
ALL
Min age
18 Years
Max age
90 Years
Healthy volunteers
No
Inclusion Criteria:
* Adults aged ≥18 years.
* History of intracranial venous sinus stent implantation.
* Undergoing follow-up contrast-enhanced CT angiography after stent -placement.
* Available clinical and imaging data.
Exclusion Criteria:
* Severe motion artifacts affecting image interpretation.
* Contraindication to iodinated contrast media.
* Severe renal impairment preventing contrast-enhanced CT examination.
* Incomplete imaging data.
* Other conditions preventing reliable assessment of the venous sinus stent.
Primary outcome measure(s)
Agreement between UHR PCD-CTA and DSA for intracranial venous sinus stent patency — 1-4 years Agreement between ultra-high-resolution photon-counting detector CT angiography (UHR PCD-CTA) and digital subtraction angiography (DSA) for the assessment of intracranial venous sinus stent patency will be quantified using Cohen's kappa (κ) coefficient. Stent patency will be classified according to the predefined diagnostic criteria, with DSA serving as the reference standard.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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