Sternum PA Oblique (RAO) Techniques Quiz

Study Notes

Technical Factors

Standard Imaging Distance (SID) is set to 40 inches.
Image receptor (IR) size is 10" x 12" in portrait orientation, with a grid required.
For exposure, a duration of 3 to 4 seconds is recommended if using a breathing technique.
A Photostimulable Phosphor (PSP) setting of 70/16 is utilized for slow breathing technique.

Sternum: PA Oblique (RAO)

This projection is indicated for examining pathologies of the sternum, including fractures and inflammatory conditions.

Part Position

The patient is positioned obliquely at a 15° to 20° angle toward the right side for the RAO view.
Align the long axis of the sternum with the central ray (CR) and the midline of the table or upright bucky.
The top of the IR should be positioned about 4 cm superior to the jugular notch.

Patient Position

The preferred position is erect, but a semiprone position is acceptable, with slight rotation.
The right arm should be positioned down by the side, and the left arm elevated.
In recumbent cases, a 15° to 20° rotation for the RAO view is necessary.

Evaluation Criteria

Criteria for evaluating the quality of the radiographic image are not specified but are critical for accurate interpretation.

Central Ray (CR)

The central ray is perpendicular to the IR.
It enters the elevated side of the posterior thorax, 1 inch (2.5 cm) lateral to the midsagittal plane (MSP) at the level of the 7th thoracic vertebra (T7).

Description

Test your knowledge on the technical factors, clinical indications, and part positioning for performing a PA oblique (RAO) view of the sternum. This quiz covers essential concepts for radiography students and practitioners alike. Perfect for those preparing for practical exams or wanting to refresh their skills.