You Position: Home > Paper
The diagnosis of orbital tumor with dynamic contrast-enhanced MRI
( views:367, downloads:516 )
- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 4
- DOI:
- 10.3760/j.issn:1005-1201.2006.04.006
- Key Word:
- 眼眶;磁共振成像;图像增强
Abstract： 目的运用动态增强MR技术,分析病变的强化特点,以提高对不同眼眶病变的认识,尤其是不同良性肿瘤及恶性肿瘤的强化特点,进而提高MRI的诊断价值.方法共41例,均为单发病灶,均行MR检查,术后均得到病理证实.其中良性肿瘤和类肿瘤病变31例,恶性肿瘤病变10例.使用1.5 T超导MR机,头颅线圈采集.MR平扫包括:横断面T1WI、T2WI及T1WI矢状和冠状面扫描.层厚4 mm.增强检查为使用对比剂后立即连续动态扫描,以观察病变的动态变化状况.对所测得的平扫及动态增强信号强度值(前、后),计算其强化率(E%)并得到时间-密度曲线(TIC),并进行统计学分析.结果(1)良恶性肿瘤第1分钟内平均强化率(E1%)比较:恶性肿瘤的E1%>60%,而良性肿瘤的E1%<60%,二者差异有统计学意义(P<0.05);(2)27例良性肿瘤除脑膜瘤外,绝大多数(88.9%,24例)强化为线型;(3)10例恶性肿瘤和3例脑膜瘤为平台型强化.(4)3例炎性假瘤和1例肉芽肿病变,表现为流出型.(5)12例海绵状血管瘤有特殊的强化模式,表现为局部点状和小结节状强化,然后逐步向全肿瘤扩展.结论动态增强MR检查,对鉴别良恶性肿瘤有明显意义;对鉴别肿瘤和炎症也可提供重要的诊断依据;少数病种,如海绵状血管瘤有特殊的强化模式.
- [1]鲜军舫,王振常,安裕志.眼眶海绵状血管瘤的影像学表现及其意义[J].1999,(6).
- [2]梁熙虹,鲜军舫,王振常,等.眼眶淋巴管瘤的CT和MRI表现[J].2000,(5).
- [3]Schnall MD,Orel SG,Torosian MH,etc.Staging of suspected breast cancer: effect of MR imaging and MR-guided biopsy.[J].1995,196(1).
- [4]Kenji Ohtsuka,Masato Hashimoto,Hidenari Akiba.Serial Dynamic Magnetic Resonance Imaging of Orbital Cavernous Hemangioma[J].1997,123(3).
- [5]安裕志,李彬,鲜军舫.易混淆的眶尖部肿瘤的MRI特点[J].2000,(4).
- [6]魏锐利,周韵秋,陶晓峰,等.眼上静脉扩张的MRI表现分析[J].1996,(11).
- [7]Saeed P,Mackenzie IR,Rootman J,etc.Optic nerve sheath meningiomas.[J].2003,110(10).
- [8]Rieber Andrea,Merkle Elmar,B\u00f6hm Wolfgang,etc.MRI of Histologically Confirmed Mammary Carcinoma: Clinical Relevance of Diagnostic Procedures for Detection of Multifocal or Contralateral Secondary Carcinoma[J].1997.
- [9]De-Potter P.Advances in imaging in oculoplastics.[J].2001,12(5).
- [10]Wilms Guy,Raat Henricus,Dom Ren\u00e9,etc.Orbital Cavernous Hemangioma[J].1995.
- [11]Noguchi M,Takashima T,Kawashima H,etc.Breast cancer in dense breast: detection with contrast-enhanced dynamic MR imaging.[J].2000,11(3).