本文分析28例原发性和转移性肝肿瘤的核磁共振(MR)特征并与 CT 作比较。在磁场强度为0.35Tesia 的超导磁体上用各种自旋回声(spin echo)和反转回复(in-verslon recovery)成象技术获得核磁共振影象。正常肝显示为均质和中等密度。而肿瘤在自旋回声成象表现为密度增加的肿块,在反转回复成象则表现为密度减低。肿瘤的自旋—晶格弛豫时间 T_1和自旋—自旋弛豫时间 T_2均延长,且在各种类型的肿瘤和单 This article analyzed the nuclear magnetic resonance (MR) characteristics of 28 primary and metastatic liver tumors and compared them with CT. Nuclear magnetic resonance images were obtained using various spin echo and in-verslon recovery imaging techniques on a superconducting magnet with a magnetic field strength of 0.35 Tesia. Normal liver shows a homogeneous and medium density. The tumor showed a density increase in the spin echo imaging, and decreased density in the reverse reflex imaging. The tumor’s spin-lattice relaxation time T_1 and spin-spin relaxation time T_2 are both prolonged, and in various types of tumors and single