Spatial resolution (CT)
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Spatial resolution in CT is the ability to distinguish between object or structures that differ in density.
A high spatial resolution is important for one to discriminate between structures that are located within a small proximity to each other.
Factors affecting CT spatial resolution
- field of view
- as the FOV increases so do the pixel size; resulting in a decrease
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pixel size
- the smaller the pixel size the higher the spatial resolution
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focal spot size
- a larger focal spot will decrease the resolution
- magnification
- increasing will decrease the resolution
- motion of the patient
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pitch
- is inversely related to the resolution, the higher the pitch the less the resolution
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kernel
- edge enhancement kernels will have a higher resolution than soft tissue kernels
- slice thickness
- the larger the slice thickness the lower the resolution
- detector size
- increase in detector size decreases resolution
-<a href="/articles/pitch">pitch</a> <ul><li>is inversely related to the resolution, the higher the pitch the less the resolution </li></ul>- +<a href="/articles/pitch-ct">pitch</a> <ul><li>is inversely related to the resolution, the higher the pitch the less the resolution </li></ul>
-<li>kernel <ul><li>edge enhancement kernels will have a higher resolution than soft tissue kernels </li></ul>- +<li>
- +<a title="Kernel (image reconstruction for CT)" href="/articles/kernel-image-reconstruction-for-ct-1">kernel</a> <ul><li>edge enhancement kernels will have a higher resolution than soft tissue kernels </li></ul>
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