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Abstract

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80.0%, 97.5%, 93.9%, 3§¯ À̻󿡼­ 92.3%, 95.0%, 93.5% ¿´°í, ÀÌÁß¿¡ÄÚ T2 °­Á¶ Åͺ¸ ½º
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100.0%, 97.3%, 3§¯ À̻󿡼­ 92.3%, 100.0%, 95.7%·Î ÀÌÁß¿¡ÄÚ T2 °­Á¶ Åͺ¸ ½ºÇÉ¿¡ÄÚ¸¸
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ÄÚ ¿µ»ó »ç¿ëÇÒ ¶§ ´Ù´Ü°è ¿ªµ¿Àû Á¶¿µÁõ°­ ¿µ»óÀ» Ãß°¡ÇÏ´õ¶óµµ Á¤È®µµ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù.
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°íÇü ¾Ç¼º º´º¯°ú ºñ°íÇü ¾ç¼º º´º¯°úÀÇ °¨º°¿¡ À¯¿ëÇϸ®¶ó »ý°¢ÇÑ´Ù.
#ÃÊ·Ï#
Purpose : To evaluated the additive value of multiphastic contrast-enhanced dynamic
MR imaging as a supplement to dual-echo T2-weighted TSE MR imaging for the
differentiation of solid, malignant hepatic lesions from nonsolid, benign hepatic lesions.
Materials and Methods : Two radiologists retrospectively reviewed dual-echo
T2-weighted TSE MR images and gadolinium-enhanced MR images in 51 patients with
hepatic lesions (28 malignant, 69 benign). For the differentiation of malignant from
benign lesions, as seen on dual-echo T2-weighted TSE MR images, we evaluated
sensitivity, specificity, and accuracy, and compared with the results with those for dual
echo T2-weighted MR images plus multiphastic contrast-enhanced dynamic MR images.
IN addition, Az values for dual echo T2-weighted MR images were compared with
those for dual echo T2-weighted MR images plus multiphastic contrast-enhanced
dynamic MR images.
Results : For the differentiation of malignant from benign hepatic lesions, as seen on
dual-echo T2-weighted TSE images, sensitivity, specificity, and accuracy were 80.0%,
97.5%, and 93.9%, respectively, for lesions less than 3§¯ in diameter, and 92.3%, 95.0%,
and 93.5%, respectively, for those that were 3§¯ or larger. The results for dual-echo
T2-weighted MR imaging plus multiphastic contrast-enhanced dynamic MR imaging
were 86.7%, 100.0%, and 97.3%, respectively, for lesions less than 3§¯, and 92.3%,
100.0%, and 95.7%, respectively for those that were 3§¯ or larger. There were no
significant differences in sensitivity, specificity, or accuracy between the results obtained
using dual-echo T2-weighted MR imaging and those obtained with dual-echo
T2-weighted MR imaging plus multiphastic contrast-enhanced dynamic MR imaging.
Nor were there statistically significant differences in Az values between the two groups.
Conclusions : For the differentiation of solid, malignant hepatic lesions from nonsolid,
benign hepatic lesions, there is no difference in accuracy between dual-echo
T2-weighted TSE MR imaging and the additional use of multiphastic contrast-enhanced
MR imaging. Dual-echo T2-weighted TSE MR imaging may, therefore, be useful for
the differentiation of solid, malignant hepatic lesions from nonsolid, benign hepatic
lesions without the use of multiphastic contrast-enhanced MR imaging.

Liver MR; Liver neoplasms; Magnetic resonance (MR) Pulse sequences; Magnetic resonance (MR) contrast enhancement;

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