Feasibility and Image Characterization of Ultra High Resolution Coronary CT Angiography
Objective To evaluate the feasibility and quality of dual photon count detector CT(CT)in ultra-high resolution computed tomography angiography(CCTA)of coronary arteries in patients with high coronary calcium burden.Methods Twenty patients who underwent PCD-CCTA were included,and the discrete vision scale was used to evaluate image noise,coronary artery plaques,and adjacent vascular lumens,characterizing image noise texture.Results CCTA is feasible in all patients.In patients with Bv40 nucleus and 0.6 mm layer thickness reconstruction,the maximum blurring artifacts(55.2％±9.8％)and the lowest vascular sharpness(477.1±73.6％)were observed Δ HU/mm,with the highest signal-to-noise ratio(27.4±5.6),the highest CNR(32.9±6.6),and the lowest noise(17.1±2.2 HU).Considering the reconstruction with a thin slice thickness of 0.2 mm,there are significant differences in image noise,signal-to-noise ratio,CNR,vascular clarity,and blurred artifacts among different nuclei(P＜0.001).With the improvement of kernel clarity,signal-to-noise ratio and CNR continue to decrease,while image noise and vascular clarity increase.Among them,Bv89 kernel has the highest clarity(2383.4±787.1)Δ HU/mm).Conclusion The combination of ultra-high resolution CCTA and CT is feasible,which can achieve visualization of calcified coronary arteries with good image quality and high clarity.
Dual Source Photon Counting Detector CTCoronary Artery CalcificationUltra High Resolution Computed Tomography Angiography of Coronary Arteries
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