Home
Radiology Guides Anatomy Physio & Path Medicine Physics Contact
MAMMOGRAPHY-TARGET MATERIALS

Physics

MAMMOGRAPHY-TARGET MATERIALS

1. Since the breast is soft tissue, we need to use a lower kV than for skeletal radiology.
2. Mammography sets, therefore, use a lower atomic number (Z) target to generate X-rays, usually molybdenum–42, sometimes rhodium–45.
3. These have a narrower, lower energy, characteristic X-ray spectrum than tungsten.
4. Molybdenum (Mo) - K-edge is 20 keV. Characteristic radiations at 17 and 19 keV.
5. Rhodium (Rh) - K-edge is 23 keV. Characteristic radiations at 20 and 23 keV (thus more penetrating).


Avatar
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

+ Home