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Effect of T1 Shortening on T2-Weighted MRI Sequences: Comparison of Hepatic Mass Conspicuity on Images Acquired Before and After Gadolinium Enhancement

Silvia D. Chang1 and Ruedi F. Thoeni2

1 Department of Radiology, University of British Columbia, Vancouver Hospital and Health Sciences Centre, 899 W 12th Ave., Vancouver, BC, Canada V5Z 1M9.
2 Department of Radiology, University of California at San Francisco, San Francisco, CA.


Figure 1
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  		Fig. 1A —55-year-old woman with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted MR images before (A) and after (B) administration of gadolinium. B was rated as having better lesion conspicuity.

 

Figure 2
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  		Fig. 1B —55-year-old woman with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted MR images before (A) and after (B) administration of gadolinium. B was rated as having better lesion conspicuity.

 

Figure 3
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  		Fig. 2A —39-year-old man with hemangioma of liver (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. B was rated as having better lesion conspicuity.

 

Figure 4
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  		Fig. 2B —39-year-old man with hemangioma of liver (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. B was rated as having better lesion conspicuity.

 

Figure 5
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  		Fig. 3A —56-year-old man with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. Images were rated as having same lesion conspicuity.

 

Figure 6
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  		Fig. 3B —56-year-old man with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. Images were rated as having same lesion conspicuity.

 

Figure 7
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  		Fig. 4A —59-year-old man with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. A was rated as having better lesion conspicuity.

 

Figure 8
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  		Fig. 4B —59-year-old man with hepatocellular carcinoma (arrow). Fast-recovery fast spin-echo T2-weighted images before (A) and after (B) administration of gadolinium. A was rated as having better lesion conspicuity.

 

Figure 9
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  		Fig. 5 —Distribution of lesion size and conspicuity of lesions on gadolinium-enhanced T2-weighted fast-recovery fast spin-echo MR images. Graph shows no correlation between lesion conspicuity and lesion size (p = 0.22, Kruskal-Wallis test). Each dot represents lesion.

 

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