Table of Contents Summary: This prospective study compared standard-resolution photon-counting detector CT (SR-PCD-CT) with energy-integrating detector CT (EID-CT) for coronary stenosis assessment, using quantitative coronary angiography (QCA) as reference. Twenty-one patients underwent both CT modalities and invasive angiography. Stenosis grades (%DS) showed good agreement across modalities, with comparable diagnostic accuracy. PCD-CT provided significantly higher image quality than EID-CT, tho…