Optimal systolic and diastolic reconstruction windows for coronary CT angiography using 320-detector rows dynamic volume CT

Diagnostic advantage of stress computed tomography myocardial perfusion over single-photon emission computed tomography for the assessment of myocardial ischemia

“…Therefore, we propose the following scheme to utilize stress CTP: the 1-day protocol for patients with high probability of CAD requiring prompt perfusion analysis or with severe coronary calcification typically in elderly or hemodialysis patients, and the 2-day protocol for patients with stable CAD or low pre-test probability of CAD who can wait for the next visit to acquire and analyze CTA images. Last but not least, it should be noted that radiation exposure in the present study was higher than in previous studies, because the phase window of the cardiac cycle was widened from 65-85% to 30-100% of R-R interval to acquire better perfusion images [30]. Adenosine stress perfusion cardiac magnetic resonance imaging should be a promising technique to reduce radiation exposure, as recently reported in a pediatric study [31].…”

Comprehensive assessment of cavernosography with 320-row dynamic volume CT versus conventional cavernosography in erectile dysfunction patients caused by venous leakage

“…A comparative study prospectively studied the accuracy and radiation dose of invasive coronary angiography (ICA) and DVCT for the coronary artery disease (CAD), with the result showed the effective radiation dose by DVCT declined significantly than that of ICA [12] A detection of CADs scanned by a 320-detector row DVCT demonstrated that DVCT produced detailed images and high accuracy [12]. Besides, the application of multi-segment reconstruction can be more feasible with the DVCT employment [19]. Thus, we reached a conclusion that cavernosography with 320-row DVCT might be an alternative method for DVCT detection as it provides more information regarding various venous leak and subtypes in accordance with the studies above.…”

“…The 320-detector row scanner is equipped with a standard temporal resolution of nearly 175 ms, which is 50% shorter than the gantry rotation time, and it remains longer than 33 ms of catheter coronary angiography operating at speed of 30 frames/s, aiming to achieve images of excellent quality [21]. The result of a previous study of scans on the coronary arteries also showed that a 320-detector row scanner developed high-resolution images in almost 90% of coronary artery segments with low heart rates were reduced [19]. This is very useful in clinical settings to help diagnose and treat patients.…”

Radiation dose exposure of patients undergoing 320-row cardiac CT for assessing coronary angiography and global left ventricular function

“…Zhang et al [15] evaluated coronary CTA patients with BMI \ 25 using 100 kVp and 120 kVp tube voltage settings, and found diagnostic quality coronary segments of 98.2 and 98.6 %, respectively. They concluded that a 100 kVp tube voltage could be used in clinical practice for patients with BMI \ 25 for the 320-row CT. Sun et al [16] investigated the optimal reconstruction window for coronary CTA with volume CT. Based on their study of 77 patients, they showed that phase windows at 65-80 % and 70-85 % were optimal for heart rates of less than 70 bpm and 70-80 bpm, respectively. Furthermore, Gagarina et al [17] described that a 100 kVp protocol with a target of 75 % phase window in patients with BMI \ 30 was diagnostically feasible, provided that heart rate variability was low.…”