Exercise C

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Where is the central ray placed for a lateral projection of the upper airway?

C6-C7

An erect chest PA radiograph aids the patient to achieve full inspiration and helps to prevent _________ and ___________ of the pulmonary vessels.

Engorgement, hyperemia

grid is not recommended for an LPO projection of the adult chest.

False

Which posterior oblique projection would best demonstrate left lung-RPO or LPO?

LPO

Which specific position would be used if a patient unable to stand but the physician suspected that the patient had fluid in the left lung?

Left lateral decubitus

Why is a PA chest preferred to an AP projection?

Places the heart closer to the image receptor to reduce magnification of the heart

Which anterior oblique projection would best demonstrate the left lung-right anterior oblique (RAO) or left anterior oblique (LAO)?

RAO

Which specific position would be used if the patient were unable to stand but the physician suspected that the patient had free air in the left pleural cavity?

Right lateral decubitus (affected side up)

What circumstances or clinical indications suggest that an AP lordotic projection should be ordered?

Rule out calcifications or masses beneath the clavicles

Careful collimation during a chest radiograph will improve image quality by decreasing ____________ radiation to the IR.

Scatter

. The CR is placed at the level of the _____ vertebra for a PA chest projection

T7

How much separation of the posterior ribs on a lateral chest projection indicates excessive rotation from a true lateral position?

greater than 1 cm

For certain studies of the heart, the (right or left) anterior oblique requires a rotation of

left) 60 degrees

What is the name of the condition characterized by fluid entering the pleural cavity?

pleural effusion

What is the name of the condition characterized by free air entering the pleural cavity?

pneumothorax

The shoulders need to be rolled forward for the PA projection to allow the __________ to move laterally and be clear of the lung fields.

scapulae

No lead shielding is necessary for male patients or women older than age 65 during radiographic imaging of the chest.

/False:

Why should a left lateral be performed unless departmental protocol indicates otherwise?

A left lateral better demonstrates the heart region

To prevent the clavicles from obscuring the apices on an AP projection of the chest, the central ray should be angled (A) (caudad or cephalad) so that it is perpendicular to the (B)

A. +5 degrees Caudad B. Sternum

What position/projection would be used for a patient who is too ill or weak to stand for an AP lordotic projection?

AP semiaxial projection, central ray 15 to 20 degrees cephalad


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