SCCT guidelines for the interpretation and reporting of coronary computed tomographic angiography

Current utilization of cardiac computed tomography in mainland China: A national survey

“…After that, post-processing is conducted to optimize the evaluation of each coronary segment using multiple reconstruction techniques. Lastly, certificated cardiologists or radiologists interpret all the axial and reconstructed images and sign the reports 3,4 . The same procedure happens everyday in China and the United States, but there are differences in the practice patterns for each component of CCTA examination among countries.…”

Electrocardiogram‐gated coronary CT angiography dose estimates using ImPACT

“…It is common knowledge that these scan timings of scan techniques are closely related to HR. According to previous publications, the optimal cardiac phase is generally 75% of the R‐R interval (late diastole) for HR 40–60 beats per minute (bpm) or 40% (end systole) for $70-120\hspace{0.17em}\text{bpm}$ 9 , 10 , 11 . When HR was increased, the T‐P interval gradually shortened; therefore, coronary artery only has low motion in the interval of late diastole (T‐P interval) at low HR beats and end systole (Q‐T interval) at high HR beats.…”

“…Prospective CTA is a low‐dose scanning technique in which exposure occurs only during the prespecified range of the cardiac phase 9 , 10 . Therefore, the actual exposure time varies according to the patient's HR.…”

“…Although the ImpactDose has enabled better estimations of effective dose using the ICRP Publication 110 reference male and female phantoms, (8) the relationships between heart rate (HR) and cardiac scan protocols have not yet been clarified. In contrast, the Society of Cardiovascular Computed Tomography (SCCT) has published CCTA guidelines to facilitate reliable estimations of practical effective doses 9 , 10 , 11 . In the SCCT guidelines, (9) the dose‐length product (DLP) — which has accordingly been defined by a number of international organizations including the International Commission on Radiological Protection (ICRP), (12,13) European Commission, 14 , 15 and International Electrotechnical Commission 16 , 17 , 18 — has been recommended as the most useful parameter for dose estimation.…”

Diagnostic accuracy and discrimination of ischemia by fractional flow reserve CT using a clinical use rule: Results from the Determination of Fractional Flow Reserve by Anatomic Computed Tomographic Angiography study

“…17 CT images were evaluated using 3-dimensional workstations (Vital Images, Minneapolis, MN; Ziosoft, Redwood City, CA). Coronary CTA could be visualized by any postprocessing method, including axial, multiplanar reformat, maximum intensity projection, and cross-sectional analysis.…”