Skip to Main content Skip to Navigation
Theses

Design study of a Compton camera for prompts-gamma imaging during ion beam therapy

Abstract : Ion beam therapy is an innovative radiotherapy technique using mainly carbon ion and proton irradiations. Its aim is to improve the current treatment modalities. Because of the sharpness of the dose distributions, a control of the dose if possible in real time is highly desirable. A possibility is to detect the prompt gamma rays emitted subsequently to the nuclear fragmentations occurring during the treatment of the patient. In a first time two different Compton cameras (double and single scattering) have been optimised by means of Monte Carlo simulations. The response of the camera to a photon point source with a realistic energy spectrum was studied. Then, the response of the camera to the irradiation of a water phantom by a proton beam was simulated. It was first compared with measurement performed with small-size detectors. Then, using the previous measurements, we evaluated the counting rates expected in clinical conditions. In the current set-up of the camera, these counting rates are pretty high. Pile up and random coincidences will be problematic. Finally we demonstrate that the detection system is capable to detect a longitudinal shift in the Bragg peak of +or- 5 mm, even with the current reconstruction algorithm.
Complete list of metadata

Cited literature [116 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00934715
Contributor : ABES STAR :  Contact
Submitted on : Wednesday, January 22, 2014 - 3:02:27 PM
Last modification on : Friday, January 14, 2022 - 5:59:04 AM
Long-term archiving on: : Wednesday, April 23, 2014 - 4:55:15 AM

File

TH2012RichardMarie-Helene.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00934715, version 1

Citation

Marie-Hélène Richard. Design study of a Compton camera for prompts-gamma imaging during ion beam therapy. Other [cond-mat.other]. Université Claude Bernard - Lyon I, 2012. English. ⟨NNT : 2012LYO10124⟩. ⟨tel-00934715⟩

Share

Metrics

Record views

723

Files downloads

1906