An AP decubitus projection describes the patient positioned or lying on which body surface?

An AP decubitus projection describes the patient positioned or lying on which body surface?

• A. Lateral
• B. Dorsal
• C. Ventral
• D. Proximal

Answer: (A)

The main idea is that decubitus positions describe which surface is in contact with the table while the patient is lying down. An AP decubitus projection is taken with the patient in a lateral decubitus position, meaning the person is lying on their side. In this setup, the body surface touching the table is the lateral (side) surface, not the back or front. Dorsal decubitus would mean lying on the back, ventral decubitus on the abdomen, and proximal isn’t a surface orientation. This lateral-down position is used with a horizontal beam to best demonstrate air or fluid levels.

The main idea is that decubitus positions describe which surface is in contact with the table while the patient is lying down. An AP decubitus projection is taken with the patient in a lateral decubitus position, meaning the person is lying on their side. In this setup, the body surface touching the table is the lateral (side) surface, not the back or front. Dorsal decubitus would mean lying on the back, ventral decubitus on the abdomen, and proximal isn’t a surface orientation. This lateral-down position is used with a horizontal beam to best demonstrate air or fluid levels.