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IMAGE QUALITY/RESOLUTION

Physics

IMAGE QUALITY/RESOLUTION

DETERMINED BY:

1. Spatial resolution (sharpness of the image at its boundary) - described by Line Spread Function (LSF), Modulation Transfer Function (MTF). Improves with increasing mAs, kVp.

2. Contrast resolution (contrast between it and adjacent tissues caused by differing signal transmission) - improves with increasing tissue thickness. Worsens with increasing kVp, noise.

3. Noise (decreases contrast resolution) - described by Signal to Noise Ratio (SNR). Improves with increasing mAs, kVp.

4. Artefacts.


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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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