Utsunomiya Daisuke, Yamashita Yasuyuki, Okumura Syuichiro, Urata Joji
Diagnostic Imaging Center, Saiseikai Kumamoto Hospital, Kumamoto-shi, Kumamoto, Japan.
Eur Radiol. 2008 Nov;18(11):2684-90. doi: 10.1007/s00330-008-1036-4. Epub 2008 May 29.
Our aim was to prospectively investigate the contrast agent concentration and the infusion rate to obtain optimal images of the Adamkiewicz artery by 64-row MDCT. Eighty patients were divided into four groups based on the following protocol: A, 100 mL of 300 mg I/mL at 5.0 mL/s; B, 100 mL of 350 mg I/mL at 5.0 mL/s; C, 100 mL of 300 mg I/mL at 3.5 mL/s; D, 100 mL of 350 mg I/mL at 3.5 mL/s. Quantitative evaluation was performed by calculating mean aortic attenuation value from T5 to L3 level. Visual evaluation of the Adamkiewicz artery was also performed. In a quantitative evaluation, the rapid injection (A, 473.4 +/- 82.6 HU; B, 506.7 +/- 71.9 HU) was significantly superior to the slow injection (C, 371.3 +/- 65.1 HU; D, 391.5 +/- 60.8 HU). In a visual evaluation, the Adamkiewicz artery was assessable in 15 of 20 (75%), 16 of 20 (80%), 9 of 20 (45%), and 10 of 20 (50%) patients in groups A, B, C, and D, respectively. The injection protocol of 1.75 g iodine/s provides both the adequate aortic attenuation of more than 450 HU to assess the Adamkiewicz artery and the best visualization of the Adamkiewicz artery in 64-row MDCT.
我们的目的是前瞻性地研究对比剂浓度和注射速率，以通过64排MDCT获得Adamkiewicz动脉的最佳图像。80例患者根据以下方案分为四组：A组，以5.0 mL/s的速率注射100 mL含碘量为300 mgI/mL的对比剂；B组，以5.0 mL/s的速率注射100 mL含碘量为350 mgI/mL的对比剂；C组，以3.5 mL/s的速率注射100 mL含碘量为300 mgI/mL的对比剂；D组，以3.5 mL/s的速率注射100 mL含碘量为350 mgI/mL的对比剂。通过计算T5至L3水平的主动脉平均衰减值进行定量评估。同时也对Adamkiewicz动脉进行视觉评估。在定量评估中，快速注射组（A组，473.4±82.6 HU；B组，506.7±71.9 HU）明显优于慢速注射组（C组，371.3±65.1 HU；D组，391.5±60.8 HU）。在视觉评估中，A、B、C、D组分别有15/20（75%）、16/20（80%）、9/20（45%）和10/20（50%）的患者可观察到Adamkiewicz动脉。1.75 g碘/秒的注射方案既能提供超过450 HU的足够主动脉衰减以评估Adamkiewicz动脉，又能在64排MDCT中实现Adamkiewicz动脉的最佳显影。
