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Detection of small intrahepatic metastases of hepatocellular carcinomas using diffusion-weighted imaging: comparison with conventional dynamic MRI.

 Jeong-Sik Yu  ;  Jae-Joon Chung  ;  Joo Hee Kim  ;  Eun-Suk Cho  ;  Dae Jung Kim  ;  Jhii-Hyun Ahn  ;  Ki Whang Kim 
 Magnetic Resonance Imaging, Vol.29(7) : 985-992, 2011 
Journal Title
 Magnetic Resonance Imaging 
Issue Date
PURPOSE: The purpose of our study was to compare diffusion-weighted MR imaging (DWI) with conventional dynamic MRI in terms of the assessment of small intrahepatic metastases from hepatocellular carcinoma (HCC). MATERIALS AND METHODS: In 24 patients with multifocal, small (≤2 cm) intrahepatic metastatic foci of advanced HCC, a total of 134 lesions (≤1 cm, n=81; >1 cm, n=53) were subjected to a comparative analysis of hepatic MRI including static and gadopentetate dimeglumine-enhanced dynamic imaging, and DWI using a single-shot spin-echo echo-planar MRI (b values=50, 400 and 800 s/mm(2)), by two independent reviewers. RESULTS: A larger number of the lesions were detected and diagnosed as intrahepatic metastases on DWI [Reviewer 1, 121 (90%); Reviewer 2, 117 (87%)] than on dynamic imaging [Reviewer 1, 107 (80%); Reviewer 2, 105 (78%)] (P<.05). For the 81 smaller lesions (≤1 cm), DWI was able to detect more lesions than dynamic imaging [Reviewer 1, 68 (84%) vs. 56 (69%), P=.008; Reviewer 2, 65 (80%) vs. 55 (68%), P=.031], but there was no statistically significant difference between the two image sets for larger (>1 cm) lesions. CONCLUSION: Due to its higher detection rate of subcentimeter lesions, DWI could be considered complementary to dynamic MRI in the diagnosis of intrahepatic metastases of HCCs.
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1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실)
Yonsei Authors
김기황(Kim, Ki Whang) ; 김대중(Kim, Dae Jung) ; 김주희(Kim, Joo Hee) ; 안지현(Ahn, Jhii Hyun) ; 유정식(Yu, Jeong Sik) ; 정재준(Chung, Jae Joon) ; 조은석(Cho, Eun Suk)
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