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Identification and Reduction of Image Artifacts in Non-Contrast-Enhanced Velocity-Selective Peripheral Angiography at 3T
- Title
- Identification and Reduction of Image Artifacts in Non-Contrast-Enhanced Velocity-Selective Peripheral Angiography at 3T
- Authors
- Shin, Taehoon; Qin, Qin; Park, Jang-Yeon; Crawford, Robert S.; Rajagopalan, Sanjay
- Ewha Authors
- 신태훈
- SCOPUS Author ID
- 신태훈
- Issue Date
- 2016
- Journal Title
- MAGNETIC RESONANCE IN MEDICINE
- ISSN
- 0740-3194
1522-2594
- Citation
- MAGNETIC RESONANCE IN MEDICINE vol. 76, no. 2, pp. 466 - 477
- Keywords
- velocity-selective magnetization preparation; noncontrast-enhanced MR angiography at 3T; peripheral angiography
- Publisher
- WILEY-BLACKWELL
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Purpose: To identify and reduce image artifacts in noncontrast- enhanced velocity-selective (VS) magnetization-prepared peripheral MR angiography (MRA) at 3T. Methods: To avoid signal loss in the arteries, double and quadruple refocused VS excitation pulse sequences were designed that were robust to a wide range of B-0 and B-1 offset. To suppress stripe artifact and background signal variation, we successively applied two VS preparations with excitation profiles shifted by half the period of the stripes. VS-MRA using single, double, and quadruple refocused VS preparations was tested in healthy subjects and a patient. Results: In the regions of large B-0 and B-1 offsets, arterial signal loss was yielded by single refocused VS preparation, but was avoided with double or quadruple refocused preparations. Compared with single VS preparation, the two consecutive preparations with shifted excitation profiles substantially reduced the stripe artifact and background signal variation, as demonstrated by increased mean and decreased standard deviation of relative contrast-to-noise ratio. The proposed VS-MRA identified multilevel disease in the femoral arteries of the patient, as validated by digital subtraction angiography. Conclusion: Two multiple refocused VS magnetization preparations with shifted excitation profiles yield artifact-free peripheral angiograms at 3T. (C) 2015 Wiley Periodicals, Inc.
- DOI
- 10.1002/mrm.25870
- Appears in Collections:
- 공과대학 > 휴먼기계바이오공학과 > Journal papers
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