气体对比剂在胃部MRI检查中的可行性

发布时间：2018-10-26 16:03

【摘要】：目的气体可导致磁敏感伪影,其作为MRI胃部检查对比剂的研究和报道极少,本研究旨在评价气体对比剂在胃部MRI检查中的应用价值。资料与方法选取行上腹部MRI检查的60例受检者,所有受检者均给予肌内注射654-2,口服产气粉产生的气体作为对比剂,行MRI检查,分析图像质量并进行分级。结果 60例患者对产气粉口感均能接受,5例下咽时感觉不适;60例均无不良反应。MRI扫描气体对比剂充盈胃腔优良57例(95%)。气体在胃腔内呈阴性对比,连续性好,信号均匀;幽门及十二指肠近段的显示良好。MRI图像质量0级21例(35.0%),1级25例(41.7%),2级6例(10.0%),3级8例(13.3%),图像质量满足临床诊断(0~2级)52例(86.7%)。0~2级患者T2WI冠状位图像胃轮廓逼真,胃壁显示清晰,无伪影;FS-T2WI轴位图像见少许伪影,胃腔轮廓较清晰,胃壁显示良好;TIWI轴位图像伪影较少,胃壁显示尚好;T2WI轴位图像伪影较多,胃壁显示一般。3级患者T2WI冠状位、FS-T2WI、T1WI及T2WI轴位图像伪影显著,轮廓模糊,胃壁和肿瘤轮廓扭曲或重影。结论在胃部MRI检查中,采用气体作为对比剂安全,分布均匀,信号特征稳定,患者易耐受。
[Abstract]:Objective to evaluate the value of gas contrast agent in gastric MRI examination because of its little research and report as a contrast agent for MRI gastric examination, gas can lead to magnetic sensitive artifacts, and the purpose of this study is to evaluate the application of gas contrast agent in gastric MRI examination. Materials and methods 60 patients with upper abdominal MRI were selected. All of them were given intramuscular injection of 654-2 and the gas produced by oral gas powder was used as contrast medium. MRI was performed to analyze the image quality and grade. Results 60 cases were acceptable to the taste of gas producing powder, 5 cases felt uncomfortable in hypopharynx, and 60 cases had no adverse reaction. 57 cases (95%) were well filled with MRI gas contrast agent. The gas is negative contrast in the stomach cavity, the continuity is good, the signal is even; There were 21 cases (35.0%) with grade 0 of MRI images, 25 cases (41.7%) with grade 1, 6 cases (10.0%) with grade 2, 8 cases (13.3%) with grade 3. 52 cases (86.7%) of T2WI coronal images were satisfied with clinical diagnosis (grade 0 ~ 2). The gastric contours of T2WI coronal images were lifelike, the gastric wall was clear, and there was no artifact. A few artifacts were found in FS-T2WI axial images, the outline of gastric cavity was clear and the gastric wall was well displayed, while TIWI axial images showed less artifacts and better gastric wall. There were more artifacts in axial images of T2WI and average in gastric wall. In 3 grade patients with T2WI coronal image, FS-T2WI,T1WI and T2WI axial images were obviously artifact, contour was blurred, gastric wall and tumor contour was distorted or duplicated. Conclusion in MRI examination of stomach, it is safe to use gas as contrast agent, the distribution is even, the signal characteristic is stable, the patient is easy to tolerate.
【作者单位】：甘肃省永昌县人民医院放射科;兰州军区兰州总医院影像诊断中心;
【基金】：甘肃省第五批科技计划(基础研究计划)项目(145RJZA145)
【分类号】：R445.2;R57

【参考文献】