소간세포암과 간혈광조의 진단에 있어서 EPI의 유용성 : 급속 T2WI와의 비교 = Role of EPI in Diagnosing Cavernous Hemangioma & Small HCC : Compartision with Fast T2-Weighted MR Imaging

다국어 초록 (Multilingual Abstract)

Purpose : To compare single-shot echo-planar MR imaging(EPI) with breath-hold fast T2-weighted imaging(HASTEor Turbo spin-echo T2WI) for evaluation of the role of EPI in distinguishing small hepatocellular carcinoma fromcavernous hemangioma. Materials and Methods : We retrospectively evaluated MR images of 35 patients (21 cases ofsmall HCC and 14 cases of cavernous hemangioma). EPI and breath-hold fast T2WI images were obtained and comparedon the basis of lesion detection sensitivity, lesion-to-liver signal intensity ratio(SIR), contrast ratio(CT), andlesion-to-liver contrast to noise ratio(CNR). Results : For the detection of small HCC, the sensitivity of EPI andbreath-hold fast T2WI were equal in 14 of 21 cases(71.4%). The detection sensitivity of cavernous hemangioma withEPI and breath-hold fast T2WI was 100%(14/14). Mean SIR on breath-hold fast T2WI was 2.02$\pm$0.45 for small HCC and3.65$\pm$0.97 for cavernous hemangioma; on EPI, the corresponding figures wer 2.91$\pm$0.57 and 6.98$\pm$1.37. Mean CR onbreath-hold fast T2WI was 1.16$\pm$0.58 for small HCC and 2.65$\pm$0.57 for cavernous hemangioma; On EPI, the figuresobtained were 2.27$\pm$0.52 and 6.26$\pm$2.19, respectively. Mean CNR on breath-hold fast T2WI was 14.24$\pm$ 4.098 forsmall HCC and 50.28$\pm$10.96 for cavernous hemangioma, while on EPI, the corresponding figures were 13.84$\pm$3.02 and45.44$\pm$11.21. Conclusion : In detecting focal hepatic mass, the sensitivity of EPI and breath-hold fast T2WI arecomparable; for the diagnosis of small HCC and cavernous hemangioma, EPI can provide additional information.