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PLANAR IMAGING-PARAMETERS

Physics

PLANAR IMAGING-PARAMETERS

1. Collimator (appropriate collimator needs to be selected for the study):
- Low, medium or high energy
- General purpose, high resolution or high sensitivity
- Parallel, diverging, converging or pinhole

2. Count number (increase count number to increase signal-to-noise ratio, hence improving contrast resolution):
- Increase imaging time
- Increase administered radiation
3. Matrix size (large matrix provides better spatial resolution but more noise).
4. Orientation of camera/patient:
- Oblique/lateral for superimposed structures
- Continuous or step-and-shoot for large object
5. Position of camera (the gamma camera should be as close to the patient as possible to optimise spatial resolution & signal):
- Use infrared contouring system.


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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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