Line 6:1·"Plain radiograph" is under the wrong parent heading (found under "Usage").
"CT"
Line 12:1·"CT" is under the wrong parent heading (found under "Usage").
"Fluoroscopy"
Line 14:1·"Fluoroscopy" is not a recognised heading for this article type.
Semicolons
suggestion
"By convention the side that is down in contact with the table names the position; left lateral decubitus is left side down, right lateral decubitus is right side down."