Photon counting detector CT can identify mild coronary artery in-stent restenosis more reliably

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main source(s): Cardiovascular Imaging Research Group, Medical Centre, Semmelweis University. Introduction The improved spatial resolution photon-counting detector CT (PCD-CT) allows better image quality and less artefacts even in high-density structures, such as coronary artery stents. Purpose Our aim was to compare the prevalence in-stent restenosis using conventional PCD-CT. Methods retrospective study included consecutive patients with stents who underwent angiography (CCTA) either PCD-CT between January December 2022 or a 280-slice scanner 2019. following categories were used: none, not severe, severe non-diagnostic quality. Results Altogether 253 our (215 CCTA 38 had examination). mean age 62.7±10.8 years 46.8% women. In-stent detected significantly more frequently case examination, compared (47.7% 27.4%, respectively; p = 0.023). Among 15 ultra-high only one (6.7%) for assessment restenosis, while 34 cases (15.8%) group. Conclusions provided by notably helps evaluation can therefore contribute identification mild restenosis. Moreover, number scans be decreased technique.