RTBC Image Evaluation and Quality Control Questions and Answers Latest Version Already Passed

RTBC Image Evaluation and Quality Control Questions and Answers Latest Version Already Passed What is the primary goal of image evaluation in radiography? The primary goal of image evaluation is to ensure that radiographs meet diagnostic quality standards by assessing factors such as contrast, density, resolution, and absence of artifacts. Why is image sharpness important in radiographic evaluation? Sharpness ensures that fine details of anatomical structures are clearly visible, which helps in accurate diagnosis and reduces the need for repeat exposures. What factors influence image contrast in radiography? Image contrast is influenced by kilovoltage peak (kVp), subject composition, scatter radiation, and image processing techniques. How does scatter radiation affect radiographic image quality? Scatter radiation reduces image contrast by adding unwanted exposure to the film or detector, making details less distinguishable. 2 Why is it important to assess image density in radiographic quality control? Proper image density ensures that the radiograph is neither too dark nor too light, allowing clear visualization of anatomical structures. What is spatial resolution in radiography? Spatial resolution refers to the ability of an imaging system to distinguish small structures that are close together, which enhances image clarity and detail. How does motion affect image quality? Motion during exposure causes blurring, reducing image sharpness and potentially leading to the need for repeat imaging. Why is proper collimation important in image quality control? Proper collimation limits unnecessary radiation exposure, reduces scatter radiation, and improves image contrast by focusing the x-ray beam on the area of interest. What is the purpose of using quality control (QC) tests in radiography? QC tests help maintain consistency in image quality, detect equipment malfunctions, and ensure patient and operator safety by minimizing unnecessary radiation exposure. 3 How does the focal spot size affect image resolution? A smaller focal spot size improves image resolution by reducing penumbra, leading to sharper and more detailed images. What role does the exposure index play in digital radiography quality control? The exposure index provides feedback on the amount of radiation used for an image, helping technologists adjust exposure settings to avoid under- or overexposure. Why is repeat analysis important in quality control? Repeat analysis identifies common errors in image acquisition, allowing for corrective measures to reduce patient exposure and improve efficiency. What is the effect of excessive kVp on image quality? Excessive kVp reduces image contrast by increasing penetration, making it harder to differentiate between tissues of similar densities. Why is regular calibration of radiographic equipment necessary? 4 Regular calibration ensures accurate exposure settings, consistent image quality, and proper radiation safety compliance.