Contrast resolution
Contrast Resolution
Contrast resolution (pronunciation: /ˈkɒntrɑːst rɛzəˈluːʃən/) is a term used in medical imaging to describe the ability to distinguish between differences in intensity in an image. It is a critical factor in the quality of images produced by imaging systems such as MRI (Magnetic Resonance Imaging), CT scan (Computed Tomography), and Ultrasound.
Etymology
The term "contrast resolution" is derived from the English words "contrast", which refers to the difference in visual properties that makes an object distinguishable from other objects and the background, and "resolution", which refers to the detail an image holds.
Definition
Contrast resolution is the measure of the smallest intensity difference between two adjacent structures that can be detected. It is a key parameter in the evaluation of image quality in medical imaging systems. High contrast resolution allows for the detection of small or low-contrast objects within the body, which is crucial in diagnosing certain conditions.
Factors Affecting Contrast Resolution
Several factors can affect the contrast resolution of an image, including the imaging system's characteristics, the properties of the tissue being imaged, and the presence of noise in the image. For example, in MRI, the contrast resolution can be influenced by the type of tissue, the magnetic field strength, and the specific imaging sequence used.
Related Terms
- Spatial resolution: This refers to the ability of an imaging system to distinguish between two closely spaced objects.
- Image contrast: This is the difference in brightness or color that makes an object distinguishable.
- Signal-to-noise ratio (SNR): This is a measure that compares the level of a desired signal to the level of background noise.
External links
- Medical encyclopedia article on Contrast resolution
- Wikipedia's article - Contrast resolution
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