What is the recommended KV range for chest radiography?

• A. 80 to 90 KV
• B. 90 to 100 KV
• C. 110 to 125 KV
• D. 130 to 140 KV

Answer: (C)

For chest radiography, the recommended kilovoltage (KV) range is typically between 110 to 125 KV. This KV range is optimal for producing high-quality images of the thoracic structures while ensuring adequate penetration of the denser tissues, such as the heart and lungs. Using this range allows for a clearer contrast between the various anatomical features, enhancing the visibility of the lung fields, blood vessels, and any potential pathologies.

This KV level takes into account the need to penetrate the bony structures of the chest while avoiding excessive radiation to the patient. Higher KV settings can improve image quality by reducing the effects of scatter radiation, which is particularly beneficial in thick areas like the chest. The range also aligns with standards set by radiographic guidelines, which prioritize both diagnostic efficacy and patient safety.