What is the recommended patient instruction to minimize motion during a chest radiograph?

• A. Take a deep breath and hold it during exposure
• B. Hold breath after exhale
• C. Breathe normally
• D. Increase exposure time to compensate motion

Answer: (A)

Minimizing motion on a chest radiograph hinges on controlling respiration during the exposure. Instructing the patient to take a deep breath and hold it during the exposure stabilizes the chest, expands the lungs, and momentarily stops movement. This brief still moment reduces blurring from breathing, improves visualization of lung markings and mediastinal contours, and provides a more diagnostic image. Holding breath after exhale would yield less lung expansion and can still allow subtle motion as the diaphragm relaxes; normal breathing continues to blur the image, and extending the exposure time would actually increase the chance of motion blur rather than prevent it.