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.
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All of the authors, except 2, declare that they have no conflict of interests. The third author (Y. N.) is an employee of Siemens Healthcare, CA, USA. The fourth author (Y. K.) is also an employee of Healthcare Sector, Siemens Japan K.K., Tokyo, Japan. This retrospective study was approved by the Institutional Review Board of our institution.
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Takagi, H., Ota, H., Natsuaki, Y. et al. Identifying the Adamkiewicz artery using 3-T time-resolved magnetic resonance angiography: its role in addition to multidetector computed tomography angiography. Jpn J Radiol 33, 749–756 (2015). https://doi.org/10.1007/s11604-015-0490-6
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DOI: https://doi.org/10.1007/s11604-015-0490-6