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Why is the PA or AP chest projection performed at a 72 inches (180cm) SID?
to reduce magnification of the heat and the effects of the diverging ray.
If the Technologist must angle the CR for a AP Lordotic Chest Projection, How much should the technologist angle the CR?
1. patient standing vertically, angle CR 15-20 degrees cephalad
For the AP or PA Ribs Projection, Above the diaphragm, the projection is typically performed ________?
Upright and on inspiration.
The RPO Projection will demonstrate __________ribs?
right axillary ribs
How much is the patient rotated for the RAO Sternum Projection?
15-20 degrees
A PA or AP Chest projection is typically performed Upright in order to demonstrate ___________?
1. potential air/fluid levels
2. prevent engorgement of great vessels
3. allow diaphragm to move inferiorly.
When would an AP Supine Chest Projection be performed?
1. for patients who are unable to stand or sit.
2. patients in cardiac or respiratory arrest or patient who have endotracheal tube inserted.
For the AP or PA Ribs Projection, Below the diaphragm, the projection is typically performed ________?
recumbent, and on Expiration.
The RAO Projection will demonstrate _________ ribs?
Left axillary ribs
The breathing technique for an RAO Sternum Projection requires a _______?
low mA and long exposure time, and uses the heart shadow to view the sternum
When is the Exposure taken for a PA or AP Chest projection?
exposure is taken at the end of a SECOND deep full inspiration (deep breath, exhale, take another deep breath, hold it).
Why would we perform a Lateral Decubitus Chest Projection?
to demonstrate free air or fluid in the pleural space.
Posterior (AP) oblique Rib Projections demonstrate _________?
Axillary ribs closest to the IR.
the LAO Projection will demonstrate _________ ribs?
right axillary ribs
The breathing technique during an RAO Sternum Projection will ___________?
blur rib and lung detail.
An AP Lordotic Chest Projection is performed to demonstrate _______?
the apices of the lungs without superimposition of the clavicles.
When would a Right Lateral Decubitus Chest Projection be performed?
if fluid is suspected in the right pleural space or free air is suspected in the left pleural space.
Anterior (PA) Oblique Rib Projections Demonstrate __________?
axillary ribs farthest from the IR.
How much do we rotate the patients body for a Posterior/Anterior Oblique Ribs Projection?
45 degrees
Where is the Sternum projected in the RAO Sternum Projection?
demonstrated over the heart shadow to the left of the vertebral column.
An AP Lordotic Chest Projection can demonstrate or rule out what pathology?
Tuberculosis. Typically originates in the apices on the lungs.
When would a Left Lateral Decubitus Chest Projection be performed?
if fluid is suspected in the Left pleural space, or free air is suspected in the right pleural space.
The LPO projection will demonstrate _________ ribs?
Left Axillary Ribs
What is the SID for a Lateral Sternum Projection
72 inches (180 cm) SID
What is the SID for an RAO Sternum Projection?
30-inch (75 cm) SID