Podcast
Questions and Answers
What does the signal-to-noise ratio (SNR) in MR imaging represent?
What does the signal-to-noise ratio (SNR) in MR imaging represent?
- The ratio of contrast resolution to spatial resolution
- The ratio of image noise to spatial resolution
- The ratio of MR signal to background noise (correct)
- The ratio of MR signal to spatial resolution
What is contrast resolution in MR imaging?
What is contrast resolution in MR imaging?
- The visualization of subtle differences in signal intensities (correct)
- The ability to visualize detail in an MR image
- The ratio of MR signal to background noise
- The ability to distinguish between two points as separate
What is the main cause of image noise in MR imaging?
What is the main cause of image noise in MR imaging?
- Insufficient spatial resolution
- External electromagnetic interference
- Thermal motion in the patient's body and electronic noise (correct)
- Inadequate signal-to-noise ratio
How can spatial resolution in MR imaging be increased?
How can spatial resolution in MR imaging be increased?
What is spatial resolution in MR imaging?
What is spatial resolution in MR imaging?
What is the primary source of noise that affects the quality of an MR image?
What is the primary source of noise that affects the quality of an MR image?
Which of the following factors can affect the contrast resolution of an MR image?
Which of the following factors can affect the contrast resolution of an MR image?
What is the effect of increasing the spatial resolution of an MR image?
What is the effect of increasing the spatial resolution of an MR image?
What is the result of a high signal-to-noise ratio in an MR image?
What is the result of a high signal-to-noise ratio in an MR image?
Which of the following is a characteristic of high-quality MR images?
Which of the following is a characteristic of high-quality MR images?
Flashcards are hidden until you start studying
Study Notes
Factors Affecting MR Image Quality
- MR image quality depends on several factors, including signal-to-noise ratio (SNR), contrast resolution, and spatial resolution.
- Signal-to-noise ratio (SNR): the ratio of MR signal received from the tissue being imaged to the background noise.
- Contrast resolution: the ability to distinguish between different and subtle differences in signal intensities from tissues being imaged.
Spatial Resolution
- Spatial resolution: the visualization of detail in the MR image, and the ability to distinguish between two points as separate and distinct.
- Factors that can increase spatial resolution:
- Thin slices
- Fine matrices
- Small field of view (FOV)
Image Noise
- Image noise: results from irregular granular patterns, similar to interferences.
- Sources of image noise:
- Thermal motion in the patient's body: RF emission from the patient's body.
- Electronics inherent in the imaging process: noise from the imaging equipment.
Factors Affecting MR Image Quality
- MR image quality depends on several factors, including signal-to-noise ratio (SNR), contrast resolution, and spatial resolution.
- Signal-to-noise ratio (SNR): the ratio of MR signal received from the tissue being imaged to the background noise.
- Contrast resolution: the ability to distinguish between different and subtle differences in signal intensities from tissues being imaged.
Spatial Resolution
- Spatial resolution: the visualization of detail in the MR image, and the ability to distinguish between two points as separate and distinct.
- Factors that can increase spatial resolution:
- Thin slices
- Fine matrices
- Small field of view (FOV)
Image Noise
- Image noise: results from irregular granular patterns, similar to interferences.
- Sources of image noise:
- Thermal motion in the patient's body: RF emission from the patient's body.
- Electronics inherent in the imaging process: noise from the imaging equipment.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
