CT Domain 3: Image Production Welcome to your CT Domain 3: Image Production 1. CT: Image Production What is the primary function of a beam hardening filter in CT imaging? To increase the contrast resolution To reduce patient dose To decrease image noise To homogenize the X-ray beam None 2. CT: Image Production In CT imaging, what is the effect of increasing the matrix size on spatial resolution and patient dose? Increased spatial resolution and increased patient dose Increased spatial resolution and decreased patient dose Decreased spatial resolution and increased patient dose Decreased spatial resolution and decreased patient dose None 3. CT: Image Production Which of the following parameters is NOT directly controlled by the operator in a typical CT scan? Tube current Slice thickness Patient positioning X-ray beam spectrum None 4. CT: Image Production What is the primary purpose of using a bowtie filter in CT imaging? To reduce scatter radiation To enhance image detail To balance the X-ray intensity across the field of view To increase the tube current efficiency None 5. CT: Image Production In CT imaging, what effect does increasing the pitch have on image quality and patient dose? Increased image quality and increased patient dose Increased image quality and decreased patient dose Decreased image quality and increased patient dose Decreased image quality and decreased patient dose None 6. CT: Image Production What is the significance of the reconstruction kernel in CT image processing? It determines the patient positioning. It controls the X-ray beam spectrum. It influences the image noise and resolution. It adjusts the gantry tilt. None 7. CT: Image Production In CT imaging, what is the primary consequence of using a higher tube voltage (kVp)? Increased spatial resolution Increased image noise Decreased contrast resolution Decreased patient dose None 8. CT: Image Production How does the use of iterative reconstruction techniques in CT imaging compare to traditional filtered back projection in terms of image quality and radiation dose? Higher image quality and higher radiation dose with iterative reconstruction Higher image quality and lower radiation dose with iterative reconstruction Lower image quality and higher radiation dose with iterative reconstruction Lower image quality and lower radiation dose with iterative reconstruction None 9. CT: Image Production What is the role of the detector efficiency in CT image quality? It directly influences the X-ray tube current. It affects the homogeneity of the X-ray beam. It impacts the image resolution and noise. It determines the speed of the gantry rotation. None 10. CT: Image Production When considering CT image artifacts, what is typically the cause of beam hardening artifacts? Insufficient X-ray beam filtration Patient movement during scanning Variations in tissue attenuation Electrical interference with the detectors None 11. CT: Image Production How does the window width setting in CT image viewing affect the appearance of the image? It changes the level of X-ray beam penetration. It alters the range of Hounsfield units displayed. It modifies the patient dose. It adjusts the detector sensitivity. None 12. CT: Image Production In the context of CT imaging, what is the impact of increasing the tube current (m A) Enhanced image detail but increased radiation exposure Reduced image detail but decreased radiation exposure Decreased contrast resolution Increased beam hardening artifacts None 13. CT: Image Production What does the term "dual-energy CT" refer to, and how does it benefit image interpretation? Using two different matrix sizes for image reconstruction Scanning with two different gantry speeds Acquiring images with two different X-ray energy levels Applying two different types of contrast media None 14. CT: Image Production What is the significance of the slice thickness in CT imaging regarding detail and radiation dose? Thinner slices provide more detail and increase radiation dose Thinner slices provide less detail and decrease radiation dose Thicker slices provide more detail and increase radiation dose Thicker slices provide less detail and decrease radiation dose None 15. CT: Image Production How does the field of view (FOV) affect the spatial resolution in CT imaging? A larger FOV increases spatial resolution. A larger FOV decreases spatial resolution. A smaller FOV increases spatial resolution. The FOV has no effect on spatial resolution. None 16. CT: Image Production In CT imaging, how does collimation width affect image quality and patient dose? Narrower collimation improves image quality and increases patient dose. Narrower collimation reduces image quality and decreases patient dose. Wider collimation improves image quality and increases patient dose. Wider collimation reduces image quality and decreases patient dose. None 17. CT: Image Production In the context of CT imaging, what is the significance of the term "isotropic voxel"? It refers to a voxel with equal dimensions in all directions, enhancing 3D reconstructions. It denotes a voxel that increases radiation dose efficiency. It signifies a voxel that enhances contrast resolution. It describes a voxel that reduces image noise uniformly. None 18. CT: Image Production When considering the modulation of tube current in CT scanning, what is the primary benefit of this technique? It increases the spatial resolution. It allows for uniform image quality with reduced patient dose. It enhances the contrast resolution significantly. It decreases the scan time. None 19. CT: Image Production How does the use of a higher reconstruction algorithm iteration number in iterative reconstruction impact CT images? It reduces image noise but may cause loss of detail. It increases image noise but enhances spatial resolution. It decreases image resolution but reduces radiation dose. It increases both noise and resolution. None 20. CT: Image Production What is the role of the contrast-to-noise ratio (CNR) in evaluating CT image quality? It measures the dose efficiency of the CT system. It determines the dynamic range of the CT detectors. It assesses the distinguishability of adjacent structures with different attenuation values. It calculates the uniformity of the X-ray beam. None 21. CT: Image Production In CT imaging, what is the impact of using a higher detector quantum efficiency (DQE)? It increases the spatial resolution. It reduces the image noise and enhances dose efficiency. It decreases the contrast resolution. It extends the scanning time. None 22. CT: Image Production What is the consequence of using a lower tube potential (kVp) in CT imaging regarding image contrast and patient dose? Lower image contrast and higher patient dose Higher image contrast and lower patient dose Lower image contrast and lower patient dose Higher image contrast and higher patient dose None 23. CT: Image Production How does the selection of a scan field of view (SFOV) affect the spatial resolution in CT? A larger SFOV increases the spatial resolution. A smaller SFOV increases the spatial resolution. A larger SFOV has no effect on spatial resolution. A smaller SFOV decreases the spatial resolution. None 24. CT: Image Production In CT imaging, what is the effect of increasing the number of detector rows on scan speed and coverage? Increases scan speed and coverage Decreases scan speed and coverage Increases scan speed but decreases coverage Decreases scan speed but increases coverage None 25. CT: Image Production What is the impact of the z-axis interpolation in helical CT scanning on image quality? It improves spatial resolution but increases noise. It enhances image smoothness but can blur fine details. It decreases image resolution but reduces artifacts. It increases noise but improves contrast resolution. None 26. CT: Image Production In CT imaging, what is the effect of electronic noise on low-contrast detectability? It improves low-contrast detectability. It has no effect on low-contrast detectability. It reduces low-contrast detectability. It increases the spatial resolution of low-contrast areas. None 27. CT: Image Production How does the use of a higher pitch in helical CT scanning affect the radiation dose and image quality? Increases radiation dose and improves image quality. Decreases radiation dose but can degrade image quality. Increases both radiation dose and image noise. Decreases radiation dose and increases spatial resolution. None 28. CT: Image Production In CT imaging, how does the application of a metal artifact reduction algorithm affect the final image? It increases the visibility of metal objects. It decreases the overall image resolution. It reduces artifacts caused by metal objects. It enhances the contrast around metal objects. None 29. CT: Image Production What is the significance of temporal resolution in CT imaging, particularly in cardiac CT? It measures the ability to freeze motion and capture dynamic processes. It determines the level of contrast enhancement. It assesses the efficiency of X-ray utilization. It evaluates the uniformity of image noise across the field of view. None 30. CT: Image Production How does the application of a soft tissue reconstruction kernel affect the appearance of CT images compared to a bone kernel? It increases image sharpness and noise, ideal for bone detail. It reduces image sharpness and noise, better for soft tissue visualization. It enhances the contrast resolution specifically for soft tissues. It decreases the temporal resolution but improves the spatial resolution. None 1 out of 30 Time is Up! Time's up
