Chest-Anatomy and Positioning Flashcards
what is the name of the area between the two pleural cavities?
Mediastinum
which is NOT demonstrated within the mediastinum in PA projections of the chest?
Diaphragm
which pathologic condition of the lung involves the replacement of air with fluid in the lung interstitium and alveoli?
Pulmonary edema
Why should chest radiographs be performed with a 72-inch (183-cm) SID?
To minimize magnification of the heart
Why should chest radiographs be performed after the patient has suspended respiration after the second inspiration
To better expand the lungs
with reference to the IR, how are the midsagittal plane and the midcoronal plane positioned for the PA projection of the chest?
Midsagittal: perpendicular; midcoronal: parrallel
for the PA projection of the chest, which positioning maneuver should be performed to best remove scapulae from lung fields?
Rotate the shoulders forward
Why would the chest most likely be demonstrated using two PA projections (in which the patient is seen in suspended inspiration and suspended expiration)?
To demonstrate pneumothorax
Which of the following is an effective way to detect rotation of the patient with the PA projection radiograph of the chest?
The asymmetrical appearance of the sternoclavicular joints
For which projection of the chest should the midsagittal plane be parallel with the IR?
Lateral projection
With reference to the IR, how are the midcoronal plane and the midsagittal plane positioned for the lateral projection of the chest?
Midcoronal: perpendicular; midsagittal: parallel
which projection of the chest best demomstrates lung apices free from superimposition with the clavicles?
AP axial projection, lordotic position (Lindblom method)
which PA oblique projection of the chest may be used to evaluate the heart and great vessels?
55-60 degree LAO
How many degrees should the patient be rotated for PA oblique projections of the chest to evaluate the lungs?
RAO: 45 degrees; LAO: 45 degrees
Using a lateral decubitus position for patients who are unable to stand upright best demonstrates which of the following pathologic conditions of the chest?
Air or fluid levels
with reference to the IR, how are the midsagittal plane and the midcoronal plane positioned for the AP chest, left lateral decubitus position?
Midsagittal: perpendicular; Midcoronal: parallel
which pathologic condition of the lungs is best demonstrated with the AP chest, left lateral decubitus position?
Fluid levels in the left side or free air in the right side
which pathologic condition of the lungs is best demonstrated with the AP chest, right lateral decubitus position?
Free air in the left side or fluid levels in the right side
Which radiographic position requires that the patient be placed supine with the IR placed vertically against the patient’s right side and a horizontal central ray directed to the center of the IR?
Dorsal decubitus
which radiographic position requires that the patient be placed prone?
Ventral decubitus
Which evaluation criterion pertains to the PA projection radiograph of the chest?
Ten posterior ribs should be visible above the diaphragm
Which evaluation criterion pertains to the PA projection radiograph of the chest?
The scapulae should be projected outside the lung fields
Which evaluation criterion pertains to the lateral projection radiograph of the chest?
The ribs posterior to the vertebral column should be superimposed
which evaluation criterion pertains to the AP axial projection, lordotic position radiograph of the chest?
The ribs should appear distorted
which evaluation criterion pertains to the AP axial projection, lordotic position radiograph of the chest?
The clavicles should lie superior to the apices.
