Hirai Nobuhiko, Imakita Satoshi, Tanaka Ryoichi, Higashi Masahiro, Nishino Toshihiro, Naito Hiroaki, Ito Katsuhide
Department of Radiology, Hiroshima University Hospital, Minami-ku, Japan.
Acad Radiol. 2006 Jun;13(6):694-700. doi: 10.1016/j.acra.2006.03.003.
To establish the utility of multidetector computed tomography (CT) angiography using dual-head power injector in the diagnosis of aortic diseases.
In a prospective study, 151 patients with aortic diseases were examined by four-detector CT. Scanning was performed using bolus tracking technique. In all patients nonionic contrast was injected at the rate of 1.5 mL/sec. One hundred one patients were examined with dual-head power injector using 0.6 mL/kg contrast flushed by 30 mL of saline solution (group D). Fifty patients were examined with single-head power injector using 1.0 mL/kg contrast only (group S). We evaluated CT values at descending aorta, upper abdominal aorta, abdominal aortic bifurcation, and bilateral common femoral arteries.
There were no statistically significant difference of CT values at descending aorta, upper abdominal aorta, abdominal aortic bifurcation, and right common femoral artery. At left common femoral artery, CT values in group D were higher than those in group S with statistically difference (P < .05). In group D, about 40% dose reduction was achieved without reducing image qualities.
Multidetector CT angiography using dual-head power injector was valuable for the contrast dose reduction of aortic diseases.
探讨使用双头高压注射器的多排螺旋计算机断层扫描（CT）血管造影在主动脉疾病诊断中的应用价值。
前瞻性研究151例主动脉疾病患者，采用四排螺旋CT检查，运用团注追踪技术进行扫描。所有患者均以1.5 mL/秒的速率注射非离子型对比剂。101例患者使用双头高压注射器，以0.6 mL/kg对比剂加30 mL生理盐水冲管（D组）；50例患者使用单头高压注射器，仅注射1.0 mL/kg对比剂（S组）。分别测量降主动脉、上腹部主动脉、腹主动脉分叉及双侧股总动脉处的CT值。
降主动脉、上腹部主动脉、腹主动脉分叉及右侧股总动脉处的CT值在两组间差异无统计学意义。左侧股总动脉处，D组CT值高于S组，差异有统计学意义（P < 0.05）。D组在不降低图像质量的情况下，对比剂用量减少约40%。
使用双头高压注射器的多排螺旋CT血管造影对减少主动脉疾病的对比剂用量具有重要价值。
