Decubitus Positions

Tuesday, February 24, 2015

What is Decubitus Positions?

 

In x-ray positioning terminology the term decubitus indicates that the patient is lying down and the central ray is horizontal and parallel with the floor.


Decubitus Positions

 

 
decubitus lateral
Lateral Decubitus

Lateral decubitus (left or right) 

 

 – It is most often used to demonstrate the presence of air-fluid levels or free air in the chest and abdomen. The patient is positioned with the back or posterior surface is closest to image receptor and central ray is horizontal that makes an AP projection.
decubitus
Dorsal Decubitus

Dorsal Decubitus 

 

 – In this view the patient is positioned with one side of the body next to the image receptor, the horizontal central ray provide a lateral projection.

decubitus
Ventral Decubitus

Ventral Decubitus

 

  – the patient is in prone position and facing down. it also places a side of the body adjacent to the image receptor, similar to the above decubitus positions.
These 3 decubitus positions are named according to the body surface on which the patient is lying.


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