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LRA 226 Week 3 Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the proper patient position for an upright abdomen (KUB) radiograph?✔✔Standing with back against the image receptor and arms out of the field.
What adjustment is needed if a patient cannot stand for an upright abdominal x-ray?✔✔Position the patient in a left lateral decubitus.
What is the main purpose of performing a lateral chest x-ray?✔✔To visualize the lungs, heart, and retrosternal space without superimposition.
What happens if the exposure time is too long during a chest x-ray?✔✔Motion blur may occur, reducing image sharpness.
What are the key anatomical landmarks for centering a PA chest x-ray?✔✔Midsagittal plane and T7, at the level of the inferior scapulae.
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Why should the scapulae be rolled forward during a PA chest projection?✔✔To move them out of the lung fields.
What projection is used to assess air-fluid levels in the sinuses?✔✔Upright Waters (parietoacanthial) view.
What causes the heart to appear larger on an AP chest image?✔✔Magnification due to the heart being farther from the image receptor.
What is the central ray angle for an AP axial chest to visualize the apices?✔✔15 to 20 degrees cephalad.
What error occurs if a hand radiograph is not flat against the receptor?✔✔Distortion and loss of detail in the metacarpals and phalanges.
What part of the hand must be included on a PA hand radiograph?✔✔All phalanges, metacarpals, and at least 1 inch of the distal radius and ulna.
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What condition may show soft tissue swelling and fat pad displacement on a lateral elbow?✔✔Fracture or joint effusion.
Why is the 45-degree oblique view important in a hand series?✔✔To visualize the metacarpal heads and joint spaces clearly.
What projection best demonstrates the coronoid process of the ulna?✔✔AP oblique elbow with medial (internal) rotation.
How can rotation be identified on an AP pelvis radiograph?✔✔Asymmetry of the obturator foramen and iliac wings.
What must be included in a lower leg (tibia/fibula) radiograph?✔✔Both the knee and ankle joints.
Why are extremity x-rays typically done at a lower kVp?✔✔To enhance contrast and visualize soft tissue and bone detail.
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