Photon-Counting Computed Tomography for In-Stent Occlusion: Lumen Visualization and Myocardial Viability
Abstract
Background: Conventional computed tomography evaluation of coronary stents is frequently limited by metal blooming artifacts. Ultra-high-resolution photon-counting detector computed tomography (PCCT) improves visualization of the internal vessel lumen and allows myocardial tissue characterization within a single noninvasive acquisition.
Case summary: A 58-year-old man with prior right coronary artery stenting presented with crescendo chest pain despite optimal therapy. Ultra-high-resolution PCCT demonstrated chronic total in-stent occlusion and robust left anterior descending artery-to-right coronary artery collaterals. Spectral iodine mapping identified a nonviable transmural scar, supporting conservative management and avoiding unnecessary high-risk revascularization.
Discussion: Recent studies report high concordance between PCCT and magnetic resonance imaging for late enhancement. This case interests readers by demonstrating PCCT's "one-stop-shop" capability to surpass traditional imaging barriers, providing the detailed evidence necessary to optimize high-stakes clinical decisions.
Take-home message: PCCT may improve diagnostic workflows and enhance precision for the management of complex coronary artery disease.
How strong is the evidence?
Evidence Hub reads this as a case report, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health.
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