Assessment of Coronary Stents in Vivo Through Photon-Counting Computed Tomography: A Study of Diagnostic Efficacy
By
Pietro G. Lacaita
Valentin Bilgeri
Philipp Spitaler
Benedikt Kindl
Wolfgang Dichtl
Ivan Lechner
Sebastian Reinstadler
Guy Friedrich
Gerlig Widmann
Gudrun M. Feuchtner
September 19, 2026
Clinical Scorecard: Assessment of Coronary Stents in Vivo Through Photon-Counting Computed Tomography: A Study of Diagnostic Efficacy
At a Glance
Category Detail
Condition Coronary Artery Disease (CAD) Key Mechanisms Photon-counting computed tomography (PCCT) provides higher spatial resolution and lower electronic noise compared to energy-integrating detector (EID) systems. Target Population Patients with previously implanted coronary stents undergoing assessment for in-stent restenosis (ISR). Care Setting Clinical assessment using advanced imaging techniques.
Key Highlights
PCCT shows improved image quality and fewer artifacts compared to EID-CT. The study assesses the diagnostic performance of PCCT for detecting ≥ 50% ISR. In-stent lumen visibility is enhanced with ultrahigh-resolution imaging. Current guidelines recommend caution in using coronary CTA for stents < 3 mm in diameter. Guideline-Based Recommendations
Diagnosis
Coronary CTA is recommended as the first-line diagnostic strategy for suspected chronic coronary syndromes. Management
Coronary CTA should be cautiously used for stents ≥ 3 mm in diameter under favorable patient conditions. Monitoring & Follow-up
Risks
Conventional EID-CT may overestimate stenosis severity and yield nondiagnostic examinations. Patient & Prescribing Data
Patients undergoing clinically indicated coronary CTA with previous stent implantation.
Use of intravenous iodinated contrast and beta blockers to optimize imaging conditions.
Clinical Best Practices
Utilize PCCT for improved visualization of coronary stents. Follow established protocols for patient preparation and imaging acquisition. Related Resources & Content
