摘要
目的 探讨胃肠道磁共振水成像方法。方法 36名健康自愿者 ,随机分为胃组 16名、小肠组 2 0名。依检查部位和目的不同 ,扫描前口服水或 2 %～ 4 %安其格纳芬水溶液。选用单次激发厚层投射 2DFASE序列和 3DFASE序列进行胃肠道磁共振水成像。结果 36例均获得较为满意的 2D胃肠道磁共振水成像图像。图像无运动伪影 ,胃肠道内液体信号与周围组织信号对比良好 ,结构清晰。 10例 3DMIP图像有运动伪影 ,胃肠道轮廓模糊 ,黏膜皱襞显示不清 ,2D与 3D图像质量有明显差异 (P <0 .0 1)。水能很好充盈胃 ,胃磁共振水成像能勾勒出胃大体轮廓 ,区分胃底、胃体和胃窦。水在小肠内易被吸收而不易到达远段小肠 ,2 %～ 4 %安其格纳芬水溶液使小肠各段充盈扩张良好。结论 单次激发厚层投射 2DFASE序列是胃肠道磁共振水成像简便有效的序列 ,2 %～ 4 %安其格纳芬水溶液是较理想的小肠磁共振水成像口服造影剂。
Objective To determine a method to acquire MR gastrointestinal hydrography. Methods MR examination was performed in 36 volunteers. 16 persons drank 600-1000 ml water before scanning stomachs. 20 persons drank 1000-1500 ml 2%-4% Angiografin solution within 1 hour before scanning small bowels and six of 20 persons drank 1000-1500 ml water in another time as comparision. A single-shot 2D FASE sequence and 3D FASE sequence were used to obtain MRGIH. Results Thirty-six cases acquired all good 2D pictures. 2D images had not motion artifacts and had a good contrast between fluid signals in gastrointestinal tract and signals of adjacent tissue. Structures of gastrointestinal tract demonstrated clearly.10 cases 3D MIP images had motion artifacts and depicted unclearly. There was significant difference between 2D images and 3D MIP images (P<0.01). Water dilated stomachs well, fundus, body and antrum of the stomach denmonstrated clearly. 2%-4% Angiografin solution dilated small bowels well and water was easily absorbed in the small bowels. Conclusion A single-shot 2D FASE sequence is an effective and convenient sequence for MR gastrointestinal hydrography. 2%-4% Angiografin solution is suitable for small bowel MR hydrography. [
出处
《中国医学影像技术》
CSCD
2004年第1期17-19,共3页
Chinese Journal of Medical Imaging Technology
关键词
胃肠道
磁共振
水成像
Gastrointestinal tract
Magnetic resonance
Hydrography
