proton beam therapy

[CeeJay724]

Advertisement - Members don't see this ad

Hi
Setup: A pencil proton beam (approximately 0.5 mm in diameter) with an energy of 250MeV incident on a water phantom.

Question: What would the beam current be?

Also, if this proton beam was used to treat a patient, what would the expected dose be that the patient would recieve?

Sorry for my english - not my first language.

 

[steve7745]

The beam current would typically range between 100 - 200 nA.
Dose to a target (tumor) volume within a patient under these conditions - irradiate the 10cm X 10cm X 10cm (1 litre) volume, 10 cm deep (proximal edge of the cube) within the body (water phantom) for approximately 2 minutes with this beam and the absorbed dose is approximately 2 Gy.

 

[CeeJay724]

Thank You

You have been most helpful. Much appreciated

Could you also give me those details for a :
1) 50 MeV incident proton beam
2) 100 MeV incident proton beam
3) 150 MeV incident proton beam
4) 200 Mev incident proton beam
please.

Thank You