摘要
目的 对照电子胃镜和双对比造影,探讨仿真胃镜成像对胃部病变的诊断价值。方法 将离体新鲜猪胃制作6个直径5-14mm大小的隆起性结节“息肉病变”和5个长径6-8mm、深径1-1.5mm的凹陷性“溃疡病变”。分别行CT/MR仿真胃镜、电子胃镜和双对比造影检查。结果 空气充盈法CT仿真胃镜检出了6个结节“病变”和3个凹陷性“病变”,准确性为81.8％。泛影葡胺充盈法CT仿真胃镜、净水和钆剂充盈法MR仿真胃镜检出的病变较少,并有假阳性结果,其准确性分别为35.7％、50％和46.7％。VG图像质量以空气充盈法CT仿真胃镜图像为优,但图像细节均较电子胃镜差(p=0.000)。结论 仿真胃镜能够有效检出胃部直径5mm以上结节和深径1mm以上凹陷性病变,其诊断价值因源影像技术而异。
Objective To define the diagnostic value of single helical CT and MR virtual gastroscopy(CTVG/MRVG) of stomach polyp and ulcus lesions by comparison with electron gastroscopy and double contrast roentgenography. Methods Six simulated masses diameter from 5mm to 14mm and 5 simulated ulcer lesions deep diameter from 1mm to 1.5mm had been created in a pig stomach. CTVG and MRVG of two pig stomach (one is normal) as well as electron gastroscopy and double contrast roentgenography were performed respectively. Results All of six mass lesions and 3 of five simulated ulcer lesions were accurately depicted on CTVG images,which the stomach was inflated by air,and the accuracy is 81.8%. The less lesions and false-positive nodi were detected on positive-contrast-media filled CTVGs and MRVGs. The accuracy of meglumine diatrizoate-distended CTVG and water- or Gd-DTPA-insufflated MRVG was 35.7%,50% and 46.7% respectively. The VG imaging details was not good compared by electron gastroscopy (p=0.000). The imaging quality of air-insufflated CTVG was superior to that of other VG techniques. Conclusion Virtual gastroscopy can demonstrate effectively the masses diameter more than 5mm and ulcer lesions deep diameter more than lmm,and its diagnostic value varies from the source imaging techniques of VG.
出处
《上海医学影像》
2004年第2期99-102,共4页
Shanghai Medical Imaging
