The main objective of this study is to evaluate the dose efficiency of coronary CT angiography (CTA) using a photon counting detector CT (PCD-CT) with the dose efficiency of coronary CT angiography of prior CT generations. 100 patients with a clinical indication for coronary CT angiography will be prospectively enrolled and undergo coronary CTA on a PCD-CT. For comparison, a matched retrospective cohort of 100 patients will be created who had undergone on a prior scanner generation (retrospective cohort).
Study Type
OBSERVATIONAL
Enrollment
200
Cardiac CTA will be performed on a dual-source photon-counting CT
Cardiac CTA was performed on a dual-source CT with regular energy-integrating detector (EID-CT)
Intraluminal Enhancement of Coronary Arteries
measured on thin-slice reconstructions, in Hounsfield units
Time frame: 1 year
Image Noise
measured on thin-slice reconstructions, in Hounsfield units
Time frame: 1 year
Overall subjective image quality
as assessed by board-certified and speciality-trained radiologists on a 5-point Likert scale
Time frame: 1 year
Dose-Length Product (DLP)
Integrative descriptor for the x-ray dose applied during acquisition; can be read out from the scan protocol.
Time frame: 1 year
Diagnostic Accuracy of Coronary Artery Stenosis Assessment in Comparison with invasive catheter angiography
Comparison in the subgroups of patients who als undergo invasive catheter angiography
Time frame: 1 year
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