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Comparison of Three Free-Breathing T2-Weighted MRI Sequences in the Evaluation of Focal Liver Lesions

Bong Soo Kim1, Jung Hoon Kim2, Guk Myung Choi1, Seung Hyoung Kim1, Ji Kang Park1, Byung-Cheol Song3 and Weechang Kang4

1 Department of Diagnostic Radiology, Cheju National University Hospital, Cheju National University College of Medicine, 154, 3-do 2-dong, Jeju City, Jeju-Do, 690-716, Korea.
2 Department of Diagnostic Radiology, Soonchunhyang University Hospital, Seoul, Korea.
3 Department of Internal Medicine, Cheju National University Hospital, Cheju National University College of Medicine, Jeju, Korea.
4 Department of Information and Statistics, Daejeon University, Daejeon, Korea.


Figure 1
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  		Fig. 1A —64-year-old man with hepatic metastasis of colon cancer. MR image obtained with prospective acquisition correction turbo spin-echo sequence shows tumor with greater conspicuity, more intrahepatic vessels, and greater sharpness than do B and C.

 

Figure 2
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  		Fig. 1B —64-year-old man with hepatic metastasis of colon cancer. Respiration-triggered turbo spin-echo MR image shows motion artifacts. Depiction of tumor is worse than in A but better than in C.

 

Figure 3
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  		Fig. 1C —64-year-old man with hepatic metastasis of colon cancer. MR image obtained with prospective acquisition correction HASTE sequence depicts tumor less clearly than A and B.

 

Figure 4
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  		Fig. 2A —62-year-old man with hepatocellular carcinoma. MR image obtained with prospective acquisition correction turbo spin-echo sequence clearly depicts sharpness of contours of liver and hepatic tumor and shows intrahepatic vessels.

 

Figure 5
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  		Fig. 2B —62-year-old man with hepatocellular carcinoma. Respiration-triggered turbo spin-echo MR image depicts tumor less clearly than A but more clearly than C.

 

Figure 6
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  		Fig. 2C —62-year-old man with hepatocellular carcinoma. MR image obtained with prospective acquisition correction HASTE sequence shows tumor less apparently than do A and B.

 

Figure 7
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  		Fig. 3A —58-year-old woman with complex cyst and pseudolesion. All three sequences clearly show hyperintense cyst (arrow) in right anterior superior segment. MR image obtained with prospective acquisition correction turbo spin-echo sequence shows ghosting artifacts more prominently than does C and clearly shows hepatic vein (arrowhead), which appears as pseudolesion in C.

 

Figure 8
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  		Fig. 3B —58-year-old woman with complex cyst and pseudolesion. All three sequences clearly show hyperintense cyst (arrow) in right anterior superior segment. Respiration-triggered turbo spin-echo MR image shows ghosting artifacts more prominently than does C.

 

Figure 9
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  		Fig. 3C —58-year-old woman with complex cyst and pseudolesion. All three sequences clearly show hyperintense cyst (arrow) in right anterior superior segment. MR image obtained with prospective acquisition correction HASTE sequence shows hyperintense pseudolesion (arrowhead) in anteromedial position in relation to complex cyst. One of two reviewers misinterpreted lesion as tumor.

 

Figure 10
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  		Fig. 4A —59-year-old man with hepatocellular carcinoma. MR image obtained with prospective acquisition correction turbo spin-echo sequence shows slightly hyperintense nodule (arrow) more clearly than do B and C.

 

Figure 11
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  		Fig. 4B —59-year-old man with hepatocellular carcinoma. Respiration-triggered turbo spin-echo MR image does not clearly depict lesion.

 

Figure 12
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  		Fig. 4C —59-year-old man with hepatocellular carcinoma. MR image obtained with prospective acquisition correction HASTE sequence does not clearly show lesion.

 

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