| Term 
 
        | What is the name of the area between the two pleural cavities? |  | Definition 
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        | Term 
 
        | Which structure is not demonstrated within the mediastinum in PA projections of the chest? |  | Definition 
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        | Term 
 
        | Which pathologic condition of the lung involves the replacement of air with fluid in the lung interstitium and alveoli? |  | Definition 
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        | Term 
 
        | Why should chest radiographs be performed with a 72-inch SID? |  | Definition 
 
        | To minimize magnification of the heart. |  | 
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        | Term 
 
        | Why should chest radiographs be performed after the patient has suspended respiration after the second inspiration? |  | Definition 
 
        | To better expand the lungs |  | 
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        | Term 
 
        | With reference to the IR, how are the MSP and the MCP positioned for the PA projection of the chest? |  | Definition 
 
        | MSP perpendicular; MCP parallel |  | 
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        | Term 
 
        | For the PA projection of the chest, which positioning maneuver should be performed to best remove scapulae from  lung fields? |  | Definition 
 
        | Rotate the shoulders forward |  | 
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        | Term 
 
        | Why would the chest most likely be demonstrated using 2 PA projections (in which the patient is seen in suspended inspiration and suspended expiration)? |  | Definition 
 
        | To demonstrate pnuemothorax. |  | 
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        | Term 
 
        | Which of the following is an effective way to detect rotation of the patient with the PA projection radiograph of the chest? |  | Definition 
 
        | The asymmetrical appearance of the sternoclavicular jts. |  | 
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        | Term 
 
        | For which projection of the chest should the MSP be parallel with the IR? |  | Definition 
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        | Term 
 
        | With reference to the IR, how are the MCP and MSP positioned for the lateral projection of the chest? |  | Definition 
 
        | MCP perpendicular; MSP parallel |  | 
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        | Term 
 
        | Which projection of the chest best demonstrates lung apices free from superimposition with the clavicles? |  | Definition 
 
        | AP axial projection (lordotic position; Lindblom method) |  | 
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        | Term 
 
        | How many degrees should the patient be rotated for PA oblique projections of the chest to evaluate the heart and great vessels? |  | Definition 
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        | Term 
 
        | How many degrees should the patient be rotated for PA oblique projections of the chest to evaluate the lungs? |  | Definition 
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        | Term 
 
        | Using a lateral decubitus position for patients who are unable to stand upright best demonstrates which of the following pathologic conditions of the chest? |  | Definition 
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        | Term 
 
        | With reference to the IR, how are the MSP and MCP positioned for the AP chest (left lateral decubitus position)? |  | Definition 
 
        | MSP perpendicular; MCP parallel |  | 
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        | Term 
 
        | Which pathologic condition of the lungs is best demonstrated with the AP chest (left lateral decubitus position)? |  | Definition 
 
        | Fluid levels in the left side or free air in the right side. |  | 
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        | Term 
 
        | 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? |  | Definition 
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        | Term 
 
        | Which radiographic position requires that the patient be placed prone? |  | Definition 
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        | Term 
 
        | Which evaluation criterion pertains to the PA projection radiograph of the chest? |  | Definition 
 
        | 10 posterior ribs shoud be visible above the diaphragm. |  | 
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        | Term 
 
        | Which evaluation criterion pertains to the PA projection radiograph of the chest? |  | Definition 
 
        | The scapulae should be projected outside the lung fields. |  | 
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        | Term 
 
        | Which evaluation criterion pertains to the lateral radiograph of the chest? |  | Definition 
 
        | The ribs posterior to the vertebral column should be superimposed. |  | 
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        | Term 
 
        | Which evaluation criterion pertains to the AP axial projection(lordotic position) radiograph of the chest? |  | Definition 
 
        | The ribs should appear distorted. |  | 
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        | Term 
 
        | Which evaluation criterion pertains to the AP axial projection (lordotic position) radiograph of the chest? |  | Definition 
 
        | The clavicle should lie superior to the apices. |  | 
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