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• Clinical Article •
Non-contrast-enhanced MR angiography using spatial labeling with multiple inversion pulses sequence imaging in pulmonary artery: a feasibility study
MENG Xiao-yan  TANG Hao  WANG Qiu-xia  LI Zhen  LI Xiao-juan  CHEN Xiao  HU Jun-wu  HU Dao-yu 

DOI:10.3969/j.issn.1674-8034.2014.05.006.


[Abstract] Objective: The purpose of this study was to demonstrate the feasibility of a non-contrast-enhanced magnetic resonance angiography (MRA) sequence, Multiple Inversion Pulses Sequence (SLEEK), used in pulmonary artery, and to explore the optimum blood-suppression inversion time (BSP-TI) for good image quality.Materials and Methods: Fourteen healthy volunteers who had no contraindications to MRI and no recent health problems or surgeries were recruited in the study. All subjects were performed at a 1.5 T MRI system for assessing pulmonary artery. The ability to present four segments (① pulmonary trunk. ② main right and left pulmonary arteries. ③ interlobar arteries. ④ segmental arteries bilaterally) were evaluated independently by two radiologists using a four-point scale. Relative signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) also were determined.Results: Thirteen volunteers were successfully performed SLEEK MRA, only one volunteer failed because of irregular respiration. The subjective image quality was significantly better with BSP-TI 700 ms and 900 ms than with 500 ms, 1100 ms and 1300 ms (P<0.05). The CNR and relative SNR of pulmonary artery were significantly better with BSP-TI 700 ms than with 500 ms (P<0.05), though showed no significantly better than with 900 ms, 1100 ms and 1300 ms (P>0.05), taking into the pulmonary venous contamination consideration (1100 ms 5/13, 1300ms 9/13), the image quality with BSP-TI 700 ms for pulmonary artery was significantly better than with others.Conclusions: Performing non-contrast-enhanced MRA with SLEEK sequence can achieve clear vessel delineation both in central and peripheral pulmonary arteries with the BSP-TI of 700 ms.
[Keywords] pulmonary artery；Magnetic resonance angiography

MENG Xiao-yan Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

TANG Hao Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

WANG Qiu-xia Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

LI Zhen Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

LI Xiao-juan Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

CHEN Xiao Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

HU Jun-wu Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

HU Dao-yu* Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China

*Correspondence to: Hu DY, E-mail: cjr.hudaoyu@vip.163.com

Conflicts of interest   None.

Received  2014-04-03
Accepted  2014-07-20
DOI: 10.3969/j.issn.1674-8034.2014.05.006
DOI:10.3969/j.issn.1674-8034.2014.05.006.

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