What anatomical structures are well seen with radiography  

This is a radiograph of the upper abdomen. Just like in the chest, bones are well seen.

Most of the abdomen is comprised of soft tissue structures which are difficult to differentiate from one another. The gas that fills the stomach and bowel (intestines) appears black and makes these structures visible. The bowel that is filled with food or fluid is not well seen, as it blends into the backround gray appearance of the other soft tissue structures of the abdomen.

Fat is slightly more radiolucent than other soft tissues and appears blacker; see the preperitoneal fat stripe in the right side of the abdomen.