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- Title
Comparison between magnitude reconstruction and phase-sensitive mR imaging in the detection of myocardial infarction
- Authors
Guo, Zi-Yi; Chen, Jing; Liang, Qi-Zhou; Liao, Hai-Yan; Fu, Shui-Xi; Tang, Qian-Yu; Chen, Cai-Xiang; Han, Xiang-Jun; Gao, Feng
- Abstract
Abstract: Objective: To determine the deference between phase sensitive magnetic resonance (MR) imaging and magnitude reconstruction to detect infracted myocardium. Methods: Twenty patients (16 men; 4 women; mean age, 56 years). experienced Q-wave myocardial infarction 2 weeks earlier were examined with a 3.0-T MR system 10 minutes after administration of 0.1 mmol/kg body weight gadobenate dimeglumine. To determine the optimal TI, a TI scout sequence was used. A segmented 2D IR true fast imaging with steady-state precession (trueFISP) sequence that produces both phase-sensitive and magnitude-reconstructed images were used at TI values of 200-600 msec (TI values were varied in 100-msec steps) and at optimal TI (mean value, 330 msec). Contrast-noise ratios (CNRs) of normal and infarcted myocardium and the area of infarcted myocardium were determined. Two-tailed unpaired sample Student t test was used to compare CNRs, and area of infarction. Results: MMean CNR phase-sensitive and magnitude-reconstructed images at optimal TI (mean value, 330 msec) were 6.2, and 6.1, respectively. For a TI of 200 msec, CNR values were 5.5, and 4.2, respectively; for TI of 600 msec, CNR values were 5.8 and 4.3, respectively. Area of infarcted myocardium was underestimated on magnitude-reconstruction images (P = 0.002-0.03) for short TI values (ie., 200 msec) but not on phase sensitive reconstructed when compared with IR tureFISP images obtained at optimal TI. Conclusions: LPhase-sensitive image reconstruction results in reduced need for precise choice of TI and more consistent image quality.
- Subjects
CARDIAC magnetic resonance imaging; MYOCARDIAL infarction diagnosis; BODY weight; MEDICAL statistics; IMAGE quality analysis; COMPARATIVE studies
- Publication
Asian Pacific Journal of Tropical Medicine, 2012, Vol 5, Issue 11, p911
- ISSN
1995-7645
- Publication type
Article
- DOI
10.1016/S1995-7645(12)60170-9