Clinical application of perfusion- weighted MRI in liver diseases
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摘要: 常规磁共振检查可以反映腹部实体肿瘤的大小和形态特点,而灌注成像可以进一步了解肿瘤的血供、血管分布和血管通透性情况,有助于对肿瘤的诊断及鉴别诊断、恶性肿瘤的分期及肿瘤治疗效果的评价。简述了磁共振灌注成像的方法及常用分析指标,介绍了其在肝纤维化分期、肝肿瘤的鉴别诊断、隐匿性或微小肝转移灶的检测、肝癌或肝转移癌非手术治疗后效果观察等方面的应用现状,提出尽管磁共振检查在临床应用中受到患者身体状况等条件限制,但也具有无辐射损伤等优点,值得临床推广。Abstract: Conventional magnetic resonance imaging ( MRI) can provide the characteristics of abdominal solid tumors such as sizes and shapes, while perfusion- weighted imaging can provide additional information on the blood supply, vascular distribution, and vascular permeability of tumors. These information is useful for diagnosis and differential diagnosis, tumor staging, and evaluation of treatment outcome.The procedures and common metrics of perfusion- weighted MRI are reviewed, and its applications in liver fibrosis staging, differential diagnosis of liver tumors, detection of occult or small liver metastases, and evaluation of non- surgical treatment outcome of liver cancer or metastasis are presented. It is suggested that greater effort is needed to promote the clinical use of MRI, as it causes no radiation damage, despite the fact that the use of MRI is subject to patient conditions.
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Key words:
- magnetic resonance angiography /
- liver diseases
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