"The "step-and-shoot" method for prospective studies refers to the imaging technique in which data are acquired sequentially in an axial fashion during a pre-defined phase of the cardiac cycle (during the R-R interval) without any table movement during acquisition. After acquiring one image set, the scanner advances to the next position to continue data collection 1,2. Newer CT systems equipped with broad detectors can image the entire heart within 1 to 4 cardiac cycles."
"using 70–80 kVp and deep-learning-based AI denoising reconstructions, the effective dose for a step-and-shoot study can be reduced to"
"deep-learning reconstructions can reduce noise and blooming, helping in the assessment of stents 2.5–3 mm and dense calcification 4"
"The "step-and-shoot" method for prospective studies refers to the imaging technique in which data are acquired sequentially in an axial fashion during a pre-defined phase of the cardiac cycle (during the R-R interval) without any table movement during acquisition. After acquiring one image set, the scanner advances to the next position to continue data collection 1,2. Newer CT systems equipped with broad detectors can image the entire heart within 1 to 4 cardiac cycles."
"right coronary artery: 40% of R-R interval"
"left anterior descending: 60-70% of R-R interval"
"left circumflex artery: 50-60% of R-R interval"
"using 70–80 kVp and deep-learning-based AI denoising reconstructions, the effective dose for a step-and-shoot study can be reduced to"
Expected headings
"Purpose"
"each artery will suffer from motion artifact at different phases; the following intervals are the best ‘windows’ to prevent movement for different arteries"
"can reduce helical blurring in coronary arteries, calcifications and coronary stent versus helical acquisitions"