[Quantitative study of diffusion weighted imaging on magnetic resonance imaging in focal hepatic lesions less than 3 cm].
OBJECTIVE
To evaluate the characteristics of MR imaging of hepatic lesions using measurement of apparent diffusion coefficient (ADC) value of hepatic lesions on diffusion weighted imaging.


METHODS
MR diffusion weighted images were obtained in patients with 97 hepatic lesions (22 hepatocellular carcinomas, 21 metastatic tumors, 28 hemangiomas, 26 cysts). ADC values were evaluated with different sequences. The ADC ratio of lesion/liver was estimated.


RESULTS
Average ADC values of hepatic lesions were as follows: carcinomas (0.91 +/- 0.07) x 10(-3) mm(2)/s, metastatic tumors (1.13 +/- 0.27) x 10(-3) mm(2)/s, cavernous hemangiomas (1.94 +/- 0.37) x 10(-3) mm(2)/s, cysts (3.26 +/- 0.30) x 10(-3) mm(2)/s. The ADC ratio of lesion/liver was significantly different between primary carcinomas and metastatic tumors (P < 0.05).


CONCLUSIONS
Quantitative study in hepatic lesions using ADC values and the ADC ratio of lesion/liver, would improve the accuracy in diagnosing hepatic lesions.
Sun
Xi-Jie
XJ
Imaging Center, The Affiliated Zhujiang Hospital of The First Military Medical University, Guangzhou 510282, China.
Quan
Xian-Yue
XY
Liang
Wen
W
Wen
Zhi-Bo
ZB
Zeng
Sheng
S
Huang
Fan-Heng
FH
Tang
Ming
M
D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D004058:Diffusion; D006392:Hemangioma, Cavernous / Q000175:diagnosis; D006801:Humans; D008099:Liver / Q000473:pathology*; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000556:secondary; D008279:Magnetic Resonance Imaging