AP projection

AP pro·jec·tion

the alternative frontal radiographic projection, used mainly in bedside or portable radiography.

AP pro·jec·tion

(prŏ-jek'shŭn)
A radiographic study in which x-rays travel from anterior to posterior.
Synonym(s): anteroposterior projection.
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References in periodicals archive ?
Caption: Figure 1: Chest radiograph in AP projection showing elevation of both domes of diaphragm with interposition of colon between liver and right hemidiaphragm (Chilaiditi's sign).
There was no difference in the clinically significant rotation on AP projection between the Statscan and CR images.
On 2 (6%) images, the artefact involved only the AP projection.
In 4 (12%) images, the AP projection showed such artefact involving either the left or right hemidiaphragm (R-3; L-1), while this was seen on 5 (15%) of the lateral projections.
Bronchovascular clarity was considered unsatisfactory on 9 (27%) of the Statscan images, involving the AP projection in 5 (15%) cases, the lateral projection in 7 (21%), and both views in 3 (9%) cases.
8 points better than CR on the AP projection and 0.
In the erect AP projection, scanning is from left to right (sagittal plane) whereas, for the lateral view, it is from anterior to posterior (coronal plane).
Frontal views of all the bones and joints of the lower extremity are generally exposed in the AP projection (front to back) (Figures 4, 5, and 6).
All other frontal views of the upper extremity are normally exposed in the AP projection, front to back, as is the lower extremity.
Flat and upright views of the abdomen are usually taken in the AP projection as well, with the patient's back flat against the table.
Frontal views of the cervical spine are generally taken in the AP projection, front to back, as are the obliques.