Radiation Physics CH4
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low-energy treatment below 20kv
Contact Therapy / Endocavitary
operates at 40-50kv tube current of 2ma SSD-2.0cm filter of .5-1.0mm Al.
Contact Therapy/Endocavitary Dept
not deeper than 2mm mostly for superficial treatments
50-150kv filter 1-6mm Al tube current 5-8mA. SSD 15-20cm
HVL half value layer
defined as the thickness of a specified material that m when introduced into the path of the beam, reduces the exposure rate by one half.
Orthovoltage therapy or deep therapy
150-500kv most operate from 200-300kv and 10-20 mA
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