| 李靖,白人驹,孙浩然,汪俊萍.胰岛素瘤的MSCT和MRI特征[J].中国医学影像技术,2009,25(11):2061~2064 |
| 胰岛素瘤的MSCT和MRI特征 |
| Imaging features of insulinoma on multi-spiral CT and MRI |
| 投稿时间：2009-05-04 修订日期：2009-07-08 |
| DOI： |
| 中文关键词: 胰岛素瘤 体层摄影术,X 线计算机 磁共振成像 |
| 英文关键词:Insulinoma Tomography, X-ray computed Meganetic resonance imaging |
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| 中文摘要: |
| 目的 探讨胰岛素瘤的MSCT和MRI特征,提高对该肿瘤的定位和定性诊断能力。方法 回顾性分析经手术病理证实的18例胰岛素瘤患者的影像学资料,对12例行CT检查,1例仅行CT平扫,7例仅行三期动态增强扫描,4例同时行平扫和增强检查;16例行MR检查,其中4例同时行三期动态增强扫描;9例同时行CT和MR检查。结果 18例均为单发胰岛素瘤;8例发生在胰头(5例在钩突部),1例在胰颈,5例在胰体,4例在胰尾。CT平扫均为阴性;三期动态增强检查,11例中9例呈富血供表现,1例呈乏血供表现,1例漏诊。MR平扫肿瘤在T1WI上呈低信号,T2WI上呈等、稍高或混杂信号;4例行MR动态增强检查,均呈富血供表现。所有肿瘤边界清楚,均无血管、胰管和胆管受侵及肝转移表现。结论 胰岛素瘤有较为典型的MSCT和MRI表现,MSCT及MR检查对胰岛素瘤的定位和定性诊断有重要价值。 |
| 英文摘要: |
| Objective To investigate the imaging features of the insulinomas on MSCT and MRI, and to elevate the ability of MSCT and MR in locating and charactering the tumors. Methods All imaging data of 18 patients confirmed by surgery and pathology were retrospectively analyzed. MSCT scans were performed in 12 patients, plain CT scan was performed in 1 patient, while three-phase enhanced CT scans were performed in 7 patients, both plain and three-phase enhanced CT scans were performed in 4 patients. Sixteen patients accepted MR examinations, three-phase dynamic contrast-enhanced scans were performed in 4 patients simultaneously. Both MSCT and MR scans were performed in 9 patients. Results The origin of tumor in all patients was single. Eight tumors located in pracreatic head, 5 in uncinate process, 1 in neck, 5 in body and 4 in tail. Plain CT did not detect any tumor in all patients. Three-phase enhanced CT scanning detected 10 tumors, 9 were hypervascular, 1 was hypovascular, the rest one was missed. On plain MRI, tumors demonstrsted low sigal intensity on T1WI (n=15), high (n=13) or intermediate (n=1) or miscellaneous (n=1) sigal intensity on T2WI. Tumors of 4 patients undertaken MR dynamic contrast-enhanced scanning were hypervascular. All tumors were well-difined, no blood vessel nor pancreatic duct, bile duct infiltration or hepatic metastasis was detected. Conclusion The imaging features of insulinoma are typical on MSCT and MRI. MSCT and MR scanning are useful in locating and characterizing insulinoma. |
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