RTBC - Primary Exposure Factors Questions and Answers Already Graded A

RTBC - Primary Exposure Factors Questions and Answers Already Graded A What role does distance play in radiographic exposure? Distance affects the intensity of the x-ray beam; the further the x-ray tube is from the patient, the lower the intensity of radiation reaching the patient, which can reduce the image quality. How does the inverse square law relate to radiographic distance? The inverse square law states that when the distance from the x-ray source is doubled, the intensity of radiation is reduced by a factor of four, decreasing patient exposure. Why is it important to use the correct exposure factors for each patient? Using the correct exposure factors ensures optimal image quality, minimizing unnecessary radiation exposure while providing clear, diagnostic images. What is the impact of excessive kVp on patient radiation dose? Excessive kVp can increase patient radiation dose unnecessarily by over-penetrating the tissue, which may reduce image contrast and diagnostic quality. 2 How does the selection of proper exposure time influence image sharpness? Proper exposure time ensures that the image is neither underexposed nor overexposed, which is crucial for maintaining image sharpness and minimizing motion blur. How does changing the focal spot size affect image quality? A smaller focal spot size increases image sharpness and resolution, while a larger focal spot size reduces image detail but allows for higher power outputs. What is the relationship between patient thickness and exposure factors? Thicker body parts require higher mAs and possibly higher kVp to ensure adequate penetration of the x-ray beam, which is essential for clear imaging. How do exposure factors change when imaging a pediatric patient compared to an adult? For pediatric patients, lower mAs and sometimes lower kVp are used to reduce radiation exposure while still providing sufficient image quality. Why is it necessary to adjust exposure factors based on the type of body part being imaged? Different body parts have varying densities, and adjusting exposure factors ensures the proper balance between image quality and patient safety. 3 What is the effect of underexposing an image? Underexposing an image results in a light image with poor contrast and reduced detail, potentially making it difficult to identify certain structures. What are the primary exposure factors in radiography? The primary exposure factors in radiography include milliampere-seconds (mAs), kilovolt peak (kVp), exposure time, and distance. How does mAs affect the radiographic image? mAs controls the quantity of radiation produced. It directly influences the image density— higher mAs results in a darker image, while lower mAs creates a lighter image. What is the role of kVp in radiography? kVp determines the quality or penetrating power of the x-ray beam. A higher kVp results in more penetrating radiation, which can improve image quality and reduce patient dose. How does exposure time relate to mAs? 4 Exposure time is directly related to mAs; it is one of the components used to calculate mAs. Longer exposure times increase mAs, resulting in a higher radiation dose. How does increasing the kVp affect image contrast? Increasing the kVp reduces image contrast by making the x-rays more penetrating, allowing for better visualization of structures with similar