Hidenobu Takagi1, Hideki Ota2, Yutaka Natsuaki3, Yoshiaki Komori4, Koki Ito5, Yoshikatsu Saiki5, Kei Takase1. 1. Department of Diagnostic Radiology, Tohoku University Hospital, 1-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan. 2. Department of Diagnostic Radiology, Tohoku University Hospital, 1-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan. h-ota@rad.med.tohoku.ac.jp. 3. Siemens Medical Solutions USA, 10945, Le Conte Ave, Suite 3371, Los Angeles, CA, 90095-7206, USA. 4. Research and Collaboration Department, Imaging and Therapy Systems Division, Siemens Japan K.K., 1-11-1, Osaki, Shinagawa-ku, Tokyo, 141-8644, Japan. 5. Division of Cardiovascular Surgery, Tohoku University Hospital, 1-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan.
Abstract
PURPOSE: This study assessed Adamkiewicz artery (AKA) detectability using multidetector computed tomography angiography (MDCTA) and time-resolved magnetic resonance angiography (MRA) at 3 T. MATERIALS AND METHODS: This Institutional Review Board-approved retrospective study included 117 patients with thoracoabdominal aortic disease scheduled for aortic repair. A total of 111 patients underwent MDCTA for AKA identification; 43 patients whose AKA identification was not definitive on MDCTA underwent additional MRA. The remaining six patients, who were not indicated for iodine-contrast MDCTA, underwent only MRA. Two reviewers independently evaluated both MDCTA and MRA data. The 4-point confidence index was used. Grades 3-4 were considered sufficient for AKA diagnosis. RESULTS: AKA detectability was at 80.2% (89/111) using MDCTA and 89.8% (44/49) with MRA. In the 43 patients who underwent both MDTCA and MRA, the AKA detectability and consensus grades were significantly elevated using MRA vs. MDCTA (detectability: 88.4 vs. 69.8%, respectively, p = 0.043). AKA detectability was also higher in aortic aneurysm than aortic dissection patients on MDCTA (90.9 vs. 69.6%, respectively, p < 0.01), but not on MRA (92.9 vs. 88.6%, respectively, p = 0.99). CONCLUSIONS: Time-resolved MRA at 3 T increases AKA detectability and is recommended for patients without definitive AKA identification on MDCTA.
PURPOSE: This study assessed Adamkiewicz artery (AKA) detectability using multidetector computed tomography angiography (MDCTA) and time-resolved magnetic resonance angiography (MRA) at 3 T. MATERIALS AND METHODS: This Institutional Review Board-approved retrospective study included 117 patients with thoracoabdominal aortic disease scheduled for aortic repair. A total of 111 patients underwent MDCTA for AKA identification; 43 patients whose AKA identification was not definitive on MDCTA underwent additional MRA. The remaining six patients, who were not indicated for iodine-contrast MDCTA, underwent only MRA. Two reviewers independently evaluated both MDCTA and MRA data. The 4-point confidence index was used. Grades 3-4 were considered sufficient for AKA diagnosis. RESULTS: AKA detectability was at 80.2% (89/111) using MDCTA and 89.8% (44/49) with MRA. In the 43 patients who underwent both MDTCA and MRA, the AKA detectability and consensus grades were significantly elevated using MRA vs. MDCTA (detectability: 88.4 vs. 69.8%, respectively, p = 0.043). AKA detectability was also higher in aortic aneurysm than aortic dissection patients on MDCTA (90.9 vs. 69.6%, respectively, p < 0.01), but not on MRA (92.9 vs. 88.6%, respectively, p = 0.99). CONCLUSIONS: Time-resolved MRA at 3 T increases AKA detectability and is recommended for patients without definitive AKA identification on MDCTA.
Entities:
Keywords:
Adamkiewicz artery; Multidetector computed tomography angiography; Thoracic aortic aneurysm; Thoracoabdominal aortic aneurysm; Time-resolved magnetic resonance angiography at 3 T
Authors: E S Crawford; L G Svensson; K R Hess; S S Shenaq; J S Coselli; H J Safi; P K Mohindra; V Rivera Journal: J Vasc Surg Date: 1991-01 Impact factor: 4.268
Authors: S Shimoyama; T Nishii; Y Watanabe; A K Kono; K Kagawa; S Takahashi; K Sugimura Journal: AJNR Am J Neuroradiol Date: 2017-09-14 Impact factor: 3.825