Low radiation dose protocol in cardiac CT with 100 kVp: usefulness of display preset optimization

被引:0
作者
Takeshi Nakaura
Masafumi Kidoh
Naritsugu Sakaino
Shota Nakamura
Toshimitsu Nozaki
Akari Izumi
Kazunori Harada
Yasuyuki Yamashita
机构
[1] Amakusa Medical Center,Diagnostic Radiology
[2] Amakusa Medical Center,Department of Cardiovascular Internal Medicine
[3] Amakusa Medical Center,Department of Surgery
[4] Kumamoto University,Department of Diagnostic Radiology, Graduate School of Medical
来源
The International Journal of Cardiovascular Imaging | 2013年 / 29卷
关键词
MDCT; Low kilo voltage; Image quality; Radiation dose;
D O I
暂无
中图分类号
学科分类号
摘要
To evaluate the radiation dose and image quality of 100 kVp cardiac CT, and the effects of display setting optimization. We randomly assigned 100 patients undergoing cardiac CT to one of following two protocols. Fifty patients underwent our conventional protocol with 120 kVp, and the other 50 patients underwent our low radiation dose protocol with 100 kVp. We compared effective dose (ED); CT number, image noise, and contrast noise ratio (CNR) of ascending aorta at 120 and 100 kVp protocol. We also performed quantitative analysis and qualitative analysis for bitmap image of 120, 100 kVp, and display preset optimization for 100 kVp images. The estimated ED was 48 % lower with the 100 kVp protocol than the 120 kVp protocol (2.8 vs. 5.5 mSv, p < 0.01). There is no significant difference in the CNR between 100 and 120 kVp protocol (18.5 ± 3.6 vs. 18.6 ± 3.8, p = 0.84). Display preset optimization significantly improved image quality of 100 kVp cardiac CT, and there is no significant difference in qualitative analysis and quantitative analysis between 100 kVp scan with optimized display preset and 120 kVp scan (p > 0.05). The 100 kVp scanning with optimized display preset offers almost same image quality at cardiac CT of thin adults under 48 % decreased radiation dose.
引用
收藏
页码:1381 / 1389
页数:8
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