[Improving coronary artery imaging quality in the high heart rate region and on MDCT using a pulsating cardiac phantom].
The multi-sector reconstruction (MSR) algorithm and cardiac half-reconstruction (CHR) algorithm are the main algorithms used in cardiac reconstruction. Analysis of effective temporal resolution (TR) confirmed that optimal rotation speed depends on different heart rates when using MSR. During visualization (3D/MPR image) and quantitative (EF: ejection fraction) evaluations, it was found that image quality and measurement accuracy are well correlated with effective temporal resolution (TR) by the different algorithms. The CHR algorithm resulted in less desirable image quality at TR 250 ms than that from MSR at high heart rates (>75 bpm) in the phantom experiment. We determined that the combination of the MSR algorithm and the optimal selection of gantry rotation speed is important for obtaining high-quality cardiac imaging in the high heart rate region.
Shen
Yun
Y
GE Yokogawa Medical Systems.
Sasaki
Kosuke
K
Okano
Yoshiyuki
Y
Jinzaki
Masahiro
M
Shinya
Masae
M
Sugisawa
Koichi
K
Yamada
Minoru
M
Nagasawa
Kiyoshi
K
Kuribayashi
Sachio
S
D000465:Algorithms; D017023:Coronary Angiography / Q000379:methods*; D006321:Heart / Q000000981:diagnostic imaging*; D006339:Heart Rate; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D012399:Rotation; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D036542:Tomography, Spiral Computed / Q000379:methods*