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SPATIAL RESOLUTION

Physics

SPATIAL RESOLUTION

1. A structure in a patient is demonstrated by two factors - sharpness of the image at its boundary (spatial resolution), contrast between it and adjacent tissues caused by differing signal transmission (contrast resolution).

2. Spatial resolution describes the level of detail that can be seen on an image.

3. Assessed manually using the highest occurring frequency of lines that can be resolved in a bar pattern (line pairs per mm).

4. The smallest visible detail size is inversely related to the number of line pairs: smallest detail (mm) = 1 / number of line pairs per mm * 0.5

5. Quantified by the Modulation Transfer Function (MTF).


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REFERENCES

1. Bushberg, J. T. (2012). The essential physics of medical imaging. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. Find it at Amazon
2. Heggie, J. C., Liddell, N. A., & Maher, K. P. (1997). Applied imaging technology. Melbourne: St. Vincents Hospital.

Ⓒ A. Manickam 2018

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