Cardiovascular Imaging: Original Article64-Slice Multidetector Row Computed Tomographic Angiography of Aortoiliac and Lower Extremity Arteries: Efficacy of Test Injection Using a Monitoring Scan at Knee LevelNakaya, Yasuhiro MD; Kim, Tonsok MD; Hori, Masatoshi MD, PhD; Onishi, Hiromitsu MD, PhD; Maeda, Noboru MD; Higashihara, Hiroki MD; Tomoda, Kaname MD, PhD; Nakamura, Hironobu MD, PhDAuthor Information From the Department of Radiology, Osaka University Graduate School of Medicine, Osaka, Japan. Received for publication November 16, 2007; accepted January 3, 2008. Reprints: Yasuhiro Nakaya, MD, Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan (e-mail: [email protected]). Journal of Computer Assisted Tomography: January-February 2009 - Volume 33 - Issue 1 - p 20-25 doi: 10.1097/RCT.0b013e3181674063 Buy Metrics Abstract To evaluate the efficacy of test injection technique using a monitoring scan at knee level for 64-slice multidetector row computed tomographic (MDCT) angiography of the abdominal and lower extremity arteries. Methods: The test injection technique using low-dose serial CT scan at knee level was performed for 58 patients. Time elapsed from contrast material injection to peak enhancement for the popliteal arteries was applied to scan delay for CT angiography. 64-Slice MDCT angiography of the abdominal and lower extremity arteries obtained with a table speed of 137.5 mm/s was evaluated. Results: The time to peak enhancement was unavailable in 2 cases. CT angiographic images were of good quality in 54 cases, whereas prominent enhancement of abdominal veins was observed in 2 cases. Conclusions: The test injection using a monitoring scan at knee level was found to be useful for 64-slice MDCT angiography of the abdominal and lower extremity arteries. © 2009 Lippincott Williams & Wilkins, Inc.