Evolution of gastrointestinal double contrast radiography in China: researches, application and popularization

Figure 17 Model DC, demonstrating the mechanism of multiple mural lines sign. The “infiltration” of the lat-eral upper wall of the sac made the part of the wall less expansion (right upper picture, horizontal projection) and appeared as multiple lines of rigidifying, roughing and “whiter” in image density in other 3 pictures taken in perpendicular projection.