Ultrashort Echo Time Magnetic Resonance Angiography in Follow-up of Intracranial Aneurysms Treated With Endovascular Coiling: Comparison of Time-of-Flight, Pointwise Encoding Time Reduction With Radial Acquisition, and Contrast-Enhanced Magnetic Resonance Angiography
- Authors
- You, Sung-Hye; Kim, Byungjun; Yang, Kyung-Sook; Kim, Bo Kyu; Ryu, Jaeil
- Issue Date
- Feb-2021
- Publisher
- OXFORD UNIV PRESS INC
- Keywords
- Intracranial aneurysm; Embolization; Therapeutic; Magnetic resonance angiography
- Citation
- Neurosurgery, v.88, no.2, pp E179 - E189
- Indexed
- SCIE
SCOPUS
- Journal Title
- Neurosurgery
- Volume
- 88
- Number
- 2
- Start Page
- E179
- End Page
- E189
- URI
- https://scholarworks.korea.ac.kr/kumedicine/handle/2020.sw.kumedicine/52197
- DOI
- 10.1093/neuros/nyaa467
- ISSN
- 0148-396X
1524-4040
- Abstract
- BACKGROUND: The optimal magnetic resonance angiography (MRA) sequence for assessing the aneurysm occlusion state or in-stent flow after endovascular coiling is not well established.
OBJECTIVE: To evaluate the diagnostic performance of pointwise encoding time reduction with radial acquisition (PETRA)-MRA in patients who underwent endovascular coiling relative to that of time-of-flight (TOF)-MRA and contrast-enhanced (CE)-MRA.
METHODS: We evaluated the aneurysm occlusion state using digital subtraction angiography (DSA) and MRA. In patients who underwent stent-assisted coiling, we estimated the visibility of in-stent flow.
RESULTS: We enrolled 189 patients with assessable TOF, PETRA, and CE-MRAs after coiling. In patients who underwent simple coiling (128 patients), PETRA showed a higher sensitivity in the detection of residual flow than TOF and CE (PETRA, 100%; CE, 83%; TOF, 80%). There were no significant differences in the height of residual flow between DSA (0.68 1.45 mm) and PETRA (0.70 +/- 1.50 mm; P = 1.000). In patients who underwent stent-assisted coiling (61 patients), PETRA showed the highest sensitivity (88%) in detecting residual flow (CE, 56%; TOF, 31%). Regarding in-stent flow, PETRA, CE, and TOF showed visual scores of >= 3 with frequencies of 96.7%, 85.2%, and 37.7%, respectively. Relative signal-to-noise ratio of PETRA (0.62 +/- 0.18) was significantly higher than that of CE (0.56 +/- 0.12) and TOF (0.39 +/- 0.12; P < .001 for both).
CONCLUSION: PETRA-MRA showed excellent diagnostic performance in terms of residual flow detection and in-stent flow assessment. PETRA could be a versatile alternative sequence for following up patients with coiled aneurysm.
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