ARRT Domain 4: Image Acquisition and Evaluation Welcome to your ARRT Domain 4: Image Acquisition and Evaluation 1. ARRT: Image Acquisition and Evaluation In digital radiography, what is the primary factor that affects spatial resolution? A. Matrix size B. Pixel pitch C. Screen speed D. mAs None 2. ARRT: Image Acquisition and Evaluation The modulation transfer function (MTF) in imaging systems is used to measure: A. The efficiency of X-ray production B. The system's ability to display contrast differences C. The accuracy of image brightness over the entire image D. The system's ability to resolve small objects None 3. ARRT: Image Acquisition and Evaluation Which of the following factors does NOT influence the dose-area product (DAP) in radiographic procedures? A. Field size B. Patient thickness C. Grid ratio D. Focal spot size None 4. ARRT: Image Acquisition and Evaluation In fluoroscopy, the primary purpose of using a pulsed beam technique is to: A. Increase image resolution B. Decrease patient dose C. Improve contrast resolution D. Enhance motion detection None 5. ARRT: Image Acquisition and Evaluation What is the impact of increasing the grid ratio on image quality in radiography? A. Increases image contrast B. Decreases spatial resolution C. Decreases image contrast D. Increases motion blur None 6. ARRT: Image Acquisition and Evaluation When adjusting the window width on a digital image, what aspect of the image is being altered? A. Brightness B. Contrast C. Spatial resolution D. Noise level None 7. ARRT: Image Acquisition and Evaluation In CT imaging, what is the purpose of applying a convolution kernel to image data? A. To correct motion artifacts B. To enhance specific image textures C. To reduce radiation dose D. To increase scan speed None 8. ARRT: Image Acquisition and Evaluation The phenomenon where lower spatial frequency contrast is more easily visualized than higher spatial frequency contrast at the same contrast level is known as: A. The Aliasing effect B. The Anode heel effect C. The Contrast-detail phenomenon D. The Dose-creep phenomenon None 9. ARRT: Image Acquisition and Evaluation S-value in radiographic imaging is related to: A. Spatial resolution B. Sensitivity of the imaging system C. Speed of image acquisition D. Sharpness of the image None 10. ARRT: Image Acquisition and Evaluation In dual-energy X-ray absorptiometry (DEX A. scans, what does the two-energy level facilitate in differentiating? A) Soft tissue and fluid B. Bone and soft tissue C. Different types of soft tissues D. Different bone densities None 11. ARRT: Image Acquisition and Evaluation The use of a compensating filter in radiography is intended to: A. Enhance image resolution B. Equalize the exposure of anatomical areas with varying thickness C. Reduce patient radiation dose D. Increase the speed of image acquisition None 12. ARRT: Image Acquisition and Evaluation What effect does increasing the kilovoltage (kV) have on the contrast of a radiographic image? A. Increases contrast B. Decreases contrast C. Has no effect on contrast D. Increases contrast for low-density tissues only None 13. ARRT: Image Acquisition and Evaluation In digital radiography, what does a higher detective quantum efficiency (DQE) indicate? A. Lower image quality B. Higher radiation dose required C. Improved efficiency in converting X-ray energy into an image signal D. Decreased sensitivity to radiation None 14. ARRT: Image Acquisition and Evaluation Which of the following would NOT typically be used to control motion blur in radiographic imaging? A. Increasing the exposure time B. Using a shorter exposure time C. Patient immobilization D. Clear instructions to the patient to remain still None 15. ARRT: Image Acquisition and Evaluation The Anode Heel Effect influences the distribution of: A. Radiation intensity across the X-ray field B. Contrast on the radiographic image C. Spatial resolution in the image periphery D. Radiation dose to the patient None 16. ARRT: Image Acquisition and Evaluation In radiography, using a higher signal-to-noise ratio (SNR): A. Decreases the image quality B. Increases the image noise C. Improves the image quality D. Has no effect on image quality None 17. ARRT: Image Acquisition and Evaluation Beam hardening artifacts in computed tomography (CT) are primarily due to: A. Patient movement during scanning B. Non-uniform rotation of the gantry C. Absorption of lower energy photons in the beam D. Inadequate power supply to the CT scanner None 18. ARRT: Image Acquisition and Evaluation In radiography, the principle of Automatic Exposure Control 'AEC' is designed to: A. Reduce the patient's exposure time B. Automatically select the appropriate kV and mAs settings C. Terminate the exposure when the optimal amount of radiation has reached the image receptor D. Adjust the image brightness and contrast automatically None 19. ARRT: Image Acquisition and Evaluation The purpose of applying a collimator in radiographic imaging is to: A. Increase the field of view B. Reduce patient radiation dose by limiting the beam size C. Enhance the image resolution D. Increase the image contrast None 20. ARRT: Image Acquisition and Evaluation Scatter radiation in radiography is primarily controlled by: A. Increasing the kV settings B. Using a grid C. Decreasing the exposure time D. Narrowing the collimator aperture None 1 out of 20 Time is Up! Time's up
