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Multi-slit prompt-gamma camera for locating of distal dose falloff in proton therapy
Multi-slit prompt-gamma camera for locating of distal dose falloff in proton therapy
- Source :
- Nuclear Engineering and Technology, Vol 51, Iss 5, Pp 1406-1416 (2019)
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In this research, a multi-slit prompt-gamma camera was developed to locate the distal dose falloff of the proton beam spots in spot scanning proton therapy. To see the performance of the developed camera, therapeutic proton beams were delivered to a solid plate phantom and then the prompt gammas from the phantom were measured using the camera. Our results show that the camera locates the 90% distal dose falloff (= d90%), within about 2–3 mm of error for the spots which are composed 3.8 × 108 protons or more. The measured location of d90% is not very sensitive to the irradiation depth of the proton beam (i.e., the depth of proton beam from the phantom surface toward which the camera is located). Considering the number of protons per spot for the most distal spots in typical treatment cases (i.e., 2 Gy dose divided in 2 fields), the camera can locate d90% only for a fraction of the spots depending on the treatment cases. However, the information of those spots is still valuable in that, in the multi-slit prompt-gamma camera, the distal dose falloff of the spots is located solely based on prompt gamma measurement, i.e., not referring to Monte Carlo simulation. Keywords: Proton therapy, Prompt gamma, Beam range verification, Distal dose falloff
- Subjects :
- Physics
Proton
Spots
business.industry
020209 energy
Monte Carlo method
02 engineering and technology
lcsh:TK9001-9401
Imaging phantom
030218 nuclear medicine & medical imaging
law.invention
03 medical and health sciences
0302 clinical medicine
Optics
Nuclear Energy and Engineering
law
0202 electrical engineering, electronic engineering, information engineering
lcsh:Nuclear engineering. Atomic power
Irradiation
business
Proton therapy
Beam (structure)
Gamma camera
Subjects
Details
- ISSN :
- 17385733
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- Nuclear Engineering and Technology
- Accession number :
- edsair.doi.dedup.....eb97c48f5322dc49c108cbb56eb7f23d
- Full Text :
- https://doi.org/10.1016/j.net.2019.03.008