RTBC-Image Quality Factors Questions
and Answers Latest Version Graded A+
What does spatial resolution refer to in radiographic imaging?
✔✔Spatial resolution refers to the ability of the imaging system to distinguish small objects or
structures from one another, creating clear and detailed images.
How does beam divergence affect image quality?
✔✔Beam divergence can cause a reduction in image sharpness and resolution as the x-ray beam
spreads out, leading to blurring at the edges of the image.
What is the importance of accurate patient positioning in obtaining high-quality images?
✔✔Accurate patient positioning ensures that the area of interest is properly aligned with the
image receptor, resulting in better image quality and reduced need for repeats.
How do contrast agents improve image quality?
✔✔Contrast agents enhance the difference in density between tissues, allowing for better
visualization of structures that are otherwise difficult to differentiate, thus improving image
clarity.
1
,What is the effect of underexposure on image quality?
✔✔Underexposure results in images that are too dark and lack detail, making it difficult to
visualize the area of interest, while also increasing the risk of noise.
How does overexposure impact image quality?
✔✔Overexposure can cause images to be too bright, losing details in the areas of interest and
leading to potential over-dosage of radiation to the patient.
What is the role of contrast resolution in image quality?
✔✔Contrast resolution refers to the ability of the imaging system to distinguish between
different densities. Higher contrast resolution leads to better differentiation of tissues in the
image.
What is the impact of image processing on image quality?
✔✔Image processing enhances details, improves contrast, and reduces noise in digital imaging
systems, thereby improving the overall quality and clarity of the radiographic image.
How do artifacts affect the quality of radiographic images?
2
,✔✔Artifacts can obscure important structures and cause misinterpretations, reducing the clarity
and diagnostic value of the image.
How does the alignment of the x-ray tube and detector affect image quality?
✔✔Proper alignment between the x-ray tube and the detector ensures that the x-rays are directed
correctly, preventing distortion and maintaining image quality.
What does the term "quantum mottle" refer to in radiography?
✔✔Quantum mottle refers to a type of noise caused by insufficient x-ray photons reaching the
detector, leading to a grainy image with reduced clarity.
How does the use of high-quality imaging equipment impact image quality?
✔✔High-quality imaging equipment typically produces sharper images with better resolution,
reduced noise, and improved contrast, leading to more accurate diagnostic results.
What is the role of contrast in image quality?
✔✔Contrast refers to the difference in density between various areas of the image, helping to
distinguish different tissues or structures based on their density.
3
, How does exposure time affect image quality?
✔✔Exposure time influences the amount of radiation used in the imaging process. Too short an
exposure may result in an underexposed image, while too long an exposure may lead to motion
blur.
What is the significance of the signal-to-noise ratio in image quality?
✔✔A higher signal-to-noise ratio results in a clearer, more detailed image, as it means that the
true image signal is stronger than the background noise.
How does kVp (kilovolt peak) impact image quality?
✔✔kVp determines the energy of the x-ray beam and influences the penetration ability of the
radiation. Higher kVp increases contrast and reduces patient dose, but can sometimes reduce
image contrast.
What is the effect of mAs (milliampere-seconds) on image quality?
✔✔mAs controls the quantity of x-rays produced, which directly affects image brightness and
noise. Increasing mAs improves image quality by reducing noise and increasing exposure.
What is the role of focal spot size in image resolution?
4
and Answers Latest Version Graded A+
What does spatial resolution refer to in radiographic imaging?
✔✔Spatial resolution refers to the ability of the imaging system to distinguish small objects or
structures from one another, creating clear and detailed images.
How does beam divergence affect image quality?
✔✔Beam divergence can cause a reduction in image sharpness and resolution as the x-ray beam
spreads out, leading to blurring at the edges of the image.
What is the importance of accurate patient positioning in obtaining high-quality images?
✔✔Accurate patient positioning ensures that the area of interest is properly aligned with the
image receptor, resulting in better image quality and reduced need for repeats.
How do contrast agents improve image quality?
✔✔Contrast agents enhance the difference in density between tissues, allowing for better
visualization of structures that are otherwise difficult to differentiate, thus improving image
clarity.
1
,What is the effect of underexposure on image quality?
✔✔Underexposure results in images that are too dark and lack detail, making it difficult to
visualize the area of interest, while also increasing the risk of noise.
How does overexposure impact image quality?
✔✔Overexposure can cause images to be too bright, losing details in the areas of interest and
leading to potential over-dosage of radiation to the patient.
What is the role of contrast resolution in image quality?
✔✔Contrast resolution refers to the ability of the imaging system to distinguish between
different densities. Higher contrast resolution leads to better differentiation of tissues in the
image.
What is the impact of image processing on image quality?
✔✔Image processing enhances details, improves contrast, and reduces noise in digital imaging
systems, thereby improving the overall quality and clarity of the radiographic image.
How do artifacts affect the quality of radiographic images?
2
,✔✔Artifacts can obscure important structures and cause misinterpretations, reducing the clarity
and diagnostic value of the image.
How does the alignment of the x-ray tube and detector affect image quality?
✔✔Proper alignment between the x-ray tube and the detector ensures that the x-rays are directed
correctly, preventing distortion and maintaining image quality.
What does the term "quantum mottle" refer to in radiography?
✔✔Quantum mottle refers to a type of noise caused by insufficient x-ray photons reaching the
detector, leading to a grainy image with reduced clarity.
How does the use of high-quality imaging equipment impact image quality?
✔✔High-quality imaging equipment typically produces sharper images with better resolution,
reduced noise, and improved contrast, leading to more accurate diagnostic results.
What is the role of contrast in image quality?
✔✔Contrast refers to the difference in density between various areas of the image, helping to
distinguish different tissues or structures based on their density.
3
, How does exposure time affect image quality?
✔✔Exposure time influences the amount of radiation used in the imaging process. Too short an
exposure may result in an underexposed image, while too long an exposure may lead to motion
blur.
What is the significance of the signal-to-noise ratio in image quality?
✔✔A higher signal-to-noise ratio results in a clearer, more detailed image, as it means that the
true image signal is stronger than the background noise.
How does kVp (kilovolt peak) impact image quality?
✔✔kVp determines the energy of the x-ray beam and influences the penetration ability of the
radiation. Higher kVp increases contrast and reduces patient dose, but can sometimes reduce
image contrast.
What is the effect of mAs (milliampere-seconds) on image quality?
✔✔mAs controls the quantity of x-rays produced, which directly affects image brightness and
noise. Increasing mAs improves image quality by reducing noise and increasing exposure.
What is the role of focal spot size in image resolution?
4
