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Hepatic cavernous hemangiomas: relationship between speed of intratumoral enhancement during dynamic MRI and apparent diffusion coefficient on diffusion-weighted imaging.

Authors
 Se Jin Nam  ;  Kae Young Park  ;  Jeong-Sik Yu  ;  Jae-Joon Chung  ;  Joo Hee Kim  ;  Ki Whang Kim 
Citation
 Korean Journal of Radiology, Vol.13(6) : 728-735, 2012 
Journal Title
 Korean Journal of Radiology 
ISSN
 1229-6929 
Issue Date
2012
Abstract
OBJECTIVE: To investigate the relationships between the apparent diffusion coefficients (ADCs) on diffusion-weighted imaging (DWI) and the speed of contrast-enhancement in hepatic hemangiomas. MATERIALS AND METHODS: Sixty-nine hepatic hemangiomas (≥ 1 cm) were evaluated with DWI, by using multiple b values (b = 50, 400, 800 s/mm(2)), followed by a gadolinium-enhanced dynamic MRI. The lesions were classified into three groups, according to the speed of contrast-enhancement on the portal phase. ADCs were measured on the ADC map automatically, and were calculated by using the two different b values (mADC(50-400) with b values = 50 and 400; mADC(400-800) with b values = 400 and 800 s/mm(2)). RESULTS: The mean ADCs (× 10(-3) mm(2)/s) were significantly higher in the rapid group (1.9 ± 0.44) than in the intermediate (1.7 ± 0.35, p = 0.046) or the slow groups (1.4 ± 0.34, p = 0.002). There were significant differences between the rapid and the slow groups in mADC(50-400) (2.12 vs. 1.48; p = 0.008) and mADC(400-800) (1.68 vs. 1.22, p = 0.010), and between the rapid and the intermediate groups in mADC(50-400) (2.12 vs. 1.79, p = 0.049). Comparing mADC(50-400) with mADC(400-800), there was a significant difference only in the rapid group (p = 0.001). CONCLUSION: Higher ADCs of rapidly-enhancing hemangiomas may be related to richer intralesional vascular perfusion. Also, the restricted diffusion may be attributed to the difference of structural characteristics of hemangioma.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/91344
DOI
10.3348/kjr.2012.13.6.728
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실)
Yonsei Authors
김기황(Kim, Ki Whang) ; 김주희(Kim, Joo Hee) ; 유정식(Yu, Jeong Sik) ; 정재준(Chung, Jae Joon)
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