PMID- 17610282
OWN - NLM
STAT- MEDLINE
DCOM- 20071015
LR  - 20070731
IS  - 1053-1807 (Print)
IS  - 1053-1807 (Linking)
VI  - 26
IP  - 2
DP  - 2007 Aug
TI  - TOF-MRA using multi-oblique-stack acquisition (MOSA).
PG  - 432-6
AB  - PURPOSE: To alleviate the intrinsic limitation of current time-of-flight magnetic 
      resonance angiography (TOF-MRA) techniques, which are insensitive to in-plane 
      blood flow due to the flow saturation effect. MATERIALS AND METHODS: A 
      multi-oblique-stack acquisition (MOSA) technique was proposed in this study to 
      tackle this TOF problem by acquiring two or more TOF image stacks bearing 
      different orientations. The MOSA approach was evaluated in human brain MR 
      angiograms by integrating it with the widely used multiple overlapping thin-slab 
      acquisition (MOTSA) technique. Two TOF image sets in different orientations were 
      acquired using MOTSA. They were combined pixel-by-pixel by taking the maximum 
      intensity value. Maximum intensity projection (MIP) was then performed, and the 
      resulting MRA quality was assessed. RESULTS: The results demonstrated that MR 
      angiograms obtained by MOSA-MOTSA were clearly improved compared to those 
      acquired by conventional MOTSA in the same scan time. CONCLUSION: MOSA clearly 
      demonstrates its advantage over conventional TOF acquisition in visualizing 
      in-plane blood flows.
CI  - (c) 2007 Wiley-Liss, Inc.
FAU - Wu, Ed X
AU  - Wu EX
AD  - Laboratory of Biomedical Imaging and Signal Processing, University of Hong Kong, 
      Hong Kong. ewu@eee.hku.hk
FAU - Hui, Edward S
AU  - Hui ES
FAU - Cheung, Jerry S
AU  - Cheung JS
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Magn Reson Imaging
JT  - Journal of magnetic resonance imaging : JMRI
JID - 9105850
SB  - IM
MH  - Algorithms
MH  - Blood Flow Velocity
MH  - Brain/pathology
MH  - Cerebral Angiography/methods
MH  - Humans
MH  - Image Processing, Computer-Assisted
MH  - Imaging, Three-Dimensional
MH  - Magnetic Resonance Angiography/*methods
MH  - Magnetic Resonance Imaging/methods
MH  - Models, Statistical
EDAT- 2007/07/05 09:00
MHDA- 2007/10/16 09:00
CRDT- 2007/07/05 09:00
PHST- 2007/07/05 09:00 [pubmed]
PHST- 2007/10/16 09:00 [medline]
PHST- 2007/07/05 09:00 [entrez]
AID - 10.1002/jmri.20954 [doi]
PST - ppublish
SO  - J Magn Reson Imaging. 2007 Aug;26(2):432-6. doi: 10.1002/jmri.20954.