Magnetic resonance imaging of the upper abdomen using a free-breathing T2-weighted turbo spin echo sequence with navigator triggered prospective acquisition correction

被引:104
作者
Klessen, C
Asbach, P
Kroencke, TJ
Fischer, T
Warmuth, C
Stemmer, A
Hamm, B
Taupitz, M
机构
[1] Humboldt Univ, Univ Med Berlin, Charite, Inst Radiol, D-10098 Berlin, Germany
[2] Siemens AG, Med Solut, MR Applicat Dev, D-8520 Erlangen, Germany
关键词
abdomen; respiratory trigger; navigator echo; T2-weighted imaging; MRI;
D O I
10.1002/jmri.20293
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: To evaluate a free-breathing navigator triggered T2-weighted turbo spin-echo sequence with prospective acquisition correction (T2w-PACE-TSE) for MRI of the upper abdomen in comparison to a conventional T2-weighted TSE (T2w-CTSE), a single-shot TSE (T2w-HASTE), and a T1-weighted gradient-echo sequence (T1w-FLASH). Materials and Methods: A total of 40 consecutive patients were examined at 1.5 T using free-breathing T2w-PACETSE, free-breathing T2w-CTSE, and breath-hold T2wHASTE and T1w-FLASH acquisition. Images were evaluated qualitatively by three radiologists regarding motion artifacts, liver-spleen contrast, depiction of intralrepatic vessels, the pancreas and the adrenal glands, and overall image quality on a four-point scale. Quantitative analysis of the liver-spleen contrast was performed. Results: Depiction and sharpness of intrahepatic vessels were rated significantly better (P < 0.01) using T2w-PACE-TSE compared to T2w-CTSE and T2w-HASTE sequences. Significantly higher contrast values were measured for T2w-PACE-TSE images compared to T2w-CTSE, T2w-HASTE, and T1w-FLASH images (P < 0.01). Mean examination time of the T2w-PACE-TSE was 7.91 minutes, acquisition time of the T2w-CTSE sequence was 4.52 minutes. Conclusion: Prospective acquisition correction is an efficient method for reducing respiratory movement artifacts in T2w-TSE imaging of the upper abdomen. Compared to T2w-CTSE and T2w-HASTE sequences recognition of anatomical details and contrast can be significantly improved.
引用
收藏
页码:576 / 582
页数:7
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