|Relaxation enhanced compressed sensing three-dimensional black-blood vessel wall MR imaging: Preliminary studies|
|Li, Bo1; Li, Hao2; Li, Jun3; Zhang, Yuchen4; Wang, Xiaoying2,5; Zhang, Jue1,2; Dong, Li3; Fang, Jing1,2|
|关键词||Compressed sensing Three dimensional black-blood imaging RECS-3D MERGE Pseudo-centric phase encoding order Vessel wall imaging|
|刊名||MAGNETIC RESONANCE IMAGING|
|WOS标题词||Science & Technology|
|类目[WOS]||Radiology, Nuclear Medicine & Medical Imaging|
|研究领域[WOS]||Radiology, Nuclear Medicine & Medical Imaging|
|关键词[WOS]||ATHEROSCLEROTIC PLAQUE COMPONENTS ; STATE FREE PRECESSION ; SPIN-ECHO TSE ; MAGNETIC-RESONANCE ; THORACIC AORTA ; RECONSTRUCTION ; SEQUENCE ; CORONARY ; 3T|
Objective: In this study, we sought to investigate the feasibility of a new technique termed relaxation enhanced compressed sensing three-dimensional motion-sensitizing driven equilibrium prepared 3D rapid gradient echo sequence (RECS-3D MERGE).
Materials and methods: The RECS-3D MERGE sequence consisted of a 3D MERGE sequence for imaging, a period of delay time (TD) for relaxation enhancement, and a pseudo-centric phase encoding order used for under-sampling acquisition to maintain scan efficiency. Seven healthy volunteers and six patients with 40% to 75% carotid artery stenosis were recruited in this study. Healthy subjects underwent 3D MERGE, RECS-3D MERGE and two-dimensional (2D) TI-weighted double inversion recovery fast spin echo (T1W DIR-FSE) scans. The signal ratio (SR) values of 21 RECS-3D MERGE scans were compared in order to determine the optimal scan parameter set of acceleration factor (AF) and delay time (TD) for RECS-3D MERGE sequence. Patients then underwent 3D MERGE, RECS-3D MERGE using the aforementioned optimal scan parameter set and 2D T1W DIR-FSE scans. Two radiologists, blinded to the imaging technique, qualitatively graded each image on a six-point ordinal scale.
Results: The highest value of SR occurred with the scan parameter set of 3-fold AF and 800 ms TD. Compared to 3D MERGE, RECS-3D MERGE with the parameter set significantly improved the image quality for both healthy subjects and patients experiments, while the scan efficiency was not sacrificed. And no significant differences were observed in the subjective scores of RECS-3D MERGE and 2D T1W DIR-FSE image qualities.
Conclusion: RECS-3D MERGE technique achieved significant improvement in black-blood image quality compared with 3D MERGE. And the image quality of this 3D rapid carotid black-blood imaging technique is comparable to 2D T1W DIR-FSE while it has much higher scan efficiency. (C) 2015 Elsevier Inc. All rights reserved.
|作者单位||1.Peking Univ, Coll Engn, Beijing 100871, Peoples R China|
2.Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
3.Capital Med Univ, Beijing Anzhen Hosp, Dept Radiol, Beijing 100029, Peoples R China
4.Capital Med Univ, Beijing Anzhen Hosp, Dept Cardiol, Beijing 100029, Peoples R China
5.Peking Univ, Hosp 1, Dept Radiol, Beijing 100051, Peoples R China
|Li, Bo,Li, Hao,Li, Jun,et al. Relaxation enhanced compressed sensing three-dimensional black-blood vessel wall MR imaging: Preliminary studies[J]. MAGNETIC RESONANCE IMAGING,2015,33(7):932-938.|
|APA||Li, Bo.,Li, Hao.,Li, Jun.,Zhang, Yuchen.,Wang, Xiaoying.,...&Fang, Jing.(2015).Relaxation enhanced compressed sensing three-dimensional black-blood vessel wall MR imaging: Preliminary studies.MAGNETIC RESONANCE IMAGING,33(7),932-938.|
|MLA||Li, Bo,et al."Relaxation enhanced compressed sensing three-dimensional black-blood vessel wall MR imaging: Preliminary studies".MAGNETIC RESONANCE IMAGING 33.7(2015):932-938.|