View : 616 Download: 0

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, TaehoonQin, QinPark, Jang-YeonCrawford, Robert S.Rajagopalan, Sanjay
Ewha Authors
신태훈
SCOPUS Author ID
신태훈scopus
Issue Date
2016
Journal Title
MAGNETIC RESONANCE IN MEDICINE
ISSN
0740-3194JCR Link

1522-2594JCR Link
Citation
MAGNETIC RESONANCE IN MEDICINE vol. 76, no. 2, pp. 466 - 477
Keywords
velocity-selective magnetization preparationnoncontrast-enhanced MR angiography at 3Tperipheral angiography
Publisher
WILEY-BLACKWELL
Indexed
SCIE; SCOPUS WOS
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
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

BROWSE