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目的探讨动态增强磁共振上高血供型肝癌和假肿瘤性病变的信号特点。方法回顾性分析平扫和动态增强图像上病灶的大小、形态、位置和信号变化。结果将临床资料分为2组,高血供肝癌组病灶32个,假肿瘤性病灶28个。肝癌组24个病灶为结节形,8个为不规则形,T1WI为低信号,T2WI为高信号,平衡相为低信号病灶17个,明显高于假肿瘤性病变(P<0.05);假肿瘤性病变组14个病灶为楔形,8个为结节状,6个为不规则形。16个病灶位于肝脏包膜下,7个位于距包膜3cm内,5个病灶位于肝脏中心部位,假肿瘤性病变位于包膜下比例明显高于肝癌(P<0.05)。T1WI上,20个假肿瘤性病灶为等信号,T2WI上,26个病灶为等信号,平衡相上12个病灶为高信号,16个为等信号。随访过程中,11个假肿瘤性病灶大小无变化,6个病灶缩小,11个病灶消失。结论根据病灶的信号特点、位置形态和随访变化,有助于对高血供型肝癌和假肿瘤性病变进行鉴别。
Objective To investigate the signal characteristics of dynamic enhancement of hypervascular donor liver cancer and pseudocytopenia on MRI. Methods The size, shape, location and signal changes of lesions on plain and dynamic enhancement images were retrospectively analyzed. Results The clinical data were divided into two groups: 32 for hypercholesterolemia group and 28 for pseudocytopenia. Twenty-six lesions were nodular in shape, eight in shape of irregularity, T1WI was low signal, T2WI was high signal, balance phase was low signal lesion in 17, which was significantly higher than that of false neoplastic lesion (P <0.05) Fourteen tumor lesions were wedge-shaped, eight were nodular and six were irregular. Sixteen lesions were located under the capsule of the liver, seven were within 3 cm of the capsule, five lesions were located in the center of the liver, and the proportion of pseudoplastic lesions located in the capsule was significantly higher than that of the hepatocellular carcinoma (P <0.05). On T1WI, 20 pseudo-neoplastic lesions were equal signal, 26 lesions were equal signal on T2WI, 12 lesions were high signal on balance phase, and 16 were equal signal. During the follow-up, there were no changes in the size of 11 false tumor lesions, 6 lesions were reduced, and 11 lesions disappeared. Conclusion According to the characteristics of the signal of the lesion, the location, the shape and the follow-up changes, it is helpful to identify the high blood donation hepatocellular carcinoma and pseudocytopenia.