Moriwake Ryo, Masuda Takanori, Yamamoto Akira, Ikenaga Hiroyuki, Yoshida Koji, Takei Yasutaka, Yao Daiki, Ono Atsushi, Hiratsuka Junichi, Tamada Tsutomu
Department of Radiological Technology, Kawasaki Medical School Hospital, 577, Matsushima, Kurashiki, Okayama 701-0192, Japan.
Department of Radiological Technology, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, 288, Matsushima, Kurashiki, Okayama 701-0193, Japan.
Radiat Prot Dosimetry. 2023 Mar 17;199(4):356-362. doi: 10.1093/rpd/ncac277.
To compare the computed tomography (CT) number and the radiation dose between the 64 (group A) and 80-detector row (group B) during lower extremity computed tomography angiography (LE-CTA). We enrolled 144 patients underwent LE-CTA and compared the CT number for the popliteal arteries, radiation dose and the rate of the optimal CT number during the LE-CTA exceeding 200 HU between the two groups. The CT number for the popliteal arteries and mean dose-length product was significantly higher in Group A than in Group B (P < 0.01). The rate of the optimal CT number for the popliteal arteries was 23.6% with Group B scanner and 56.9% with Group A (P < 0.05). The 64-detector row CT was significantly higher in the CT number for the popliteal arteries, radiation dose and rate of the optimal CT number during the LE-CTA than the 80-detector row. Depiction ability did not improve by using a high CT scanner with a wider detector during LE-CTA.
比较64排（A组）和80排探测器（B组）下肢计算机断层血管造影（LE-CTA）期间的计算机断层扫描（CT）数值和辐射剂量。我们纳入了144例行LE-CTA的患者，比较了两组腘动脉的CT数值、辐射剂量以及LE-CTA期间CT数值超过200 HU的最佳CT数值率。A组腘动脉的CT数值和平均剂量长度乘积显著高于B组（P<0.01）。B组扫描仪腘动脉最佳CT数值率为23.6%，A组为56.9%（P<0.05）。64排探测器CT在LE-CTA期间腘动脉的CT数值、辐射剂量和最佳CT数值率显著高于80排探测器。在LE-CTA期间，使用具有更宽探测器的高分辨率CT扫描仪并不能提高成像能力。
