文档介绍：第三节消化道基本病变表现 Abnormal radiographic appearances
1、轮廓改变
Changes of the contour of alimentary tract
龛影(Crater or niche)
溃疡的直接X线征象,溃疡被钡剂充填,切线位表现为向腔外凸出的阴影,正位呈圆点状或不规则状的致密斑。
Crater represents the existence of the ulcer of alimentary seen in profile , the crater appears as the barium-filled projec-tion extending from the lumen.
When seen en face, it appears as a dense ovoid barium shadow.
On double contrast films, anterior wall ulcer craters Occasionally may be seen plete or plete ring shadow
龛影正位观
憩室(Diverticulum)
消化道黏膜经过管壁的薄弱区向外膨出,或管外邻近病变的粘连牵拉使管壁各层向腔外凸出,呈袋状,其内及附近的黏膜皱襞形态正常,称为憩室。
Duodenal diverticulum
憩室(内有黏膜)
充盈缺损(Filling defect)
占位性病变的直接X线征象。消化道腔内肿瘤或其他占位性病变,在造影检查时造影剂充填缺损,密度减低。
Filling defect appears as an ovoid ,crescent or irregular radiolucent shadow
充盈缺损
prePyloric leiomyoma