How does the imaging receptor (IR) lower unnecessary patient dose?

How does the imaging receptor (IR) lower unnecessary patient dose?

• A. Slow film-screen speed for quality radiograph
• B. Fastest film-screen speed for quality radiograph
• C. Increase exposure factor
• D. Use large field of view

Answer: (B)

The imaging receptor’s sensitivity to X-rays is what lets you control the dose. A faster film-screen system is more responsive, so you can achieve the needed image brightness with less exposure. Choosing the fastest film-screen speed that still yields a diagnostic-quality radiograph means you lower the dose to the patient while maintaining image usefulness. Slower speeds would require more exposure, increasing dose; increasing exposure factors directly raises dose; and using a larger field of view tends to irradiate more tissue, often increasing the dose unless exposure is carefully managed.

The imaging receptor’s sensitivity to X-rays is what lets you control the dose. A faster film-screen system is more responsive, so you can achieve the needed image brightness with less exposure. Choosing the fastest film-screen speed that still yields a diagnostic-quality radiograph means you lower the dose to the patient while maintaining image usefulness. Slower speeds would require more exposure, increasing dose; increasing exposure factors directly raises dose; and using a larger field of view tends to irradiate more tissue, often increasing the dose unless exposure is carefully managed.