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14th Geant4 Users and Collaboration Workshop

15–22 Oct 2009
Laboratori Nazionali del Sud - INFN
Europe/Rome timezone

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Session

Parallel Session III - Medical

15 Oct 2009, 16:30
Laboratori Nazionali del Sud - INFN

Laboratori Nazionali del Sud - INFN

Via S. Sofia 62, Catania (I)

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  1. 23. From imaging to dosimetry: Geant4-based study on the application of Medipix2 to neutron personnel dosimetry.
    Dr S. Guatelli (University of Wollongong, Australia)
    15/10/2009, 16:30
    Users' Workshop
    Oral presentation Users Workshop
    A Geant4 simulation study is performed to optimise a novel neutron personnel dosimeter, developed at the Centre of Medical Radiation Physics (CMRP), University of Wollongong, consisting of a silicon pixelated detector device - Medipix2- covered with a polyethylene converter on top. In this talk we would like to illustrate the Geant4 simulation developed to optimise the novel neutron...
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  2. 3. Skin Dosimetry in MRI-guided Radiotherapy (MRIgRT)
    Mr Bradley Oborn (Centre for Medical Radiation Physics)
    15/10/2009, 16:50
    Users' Workshop
    Oral presentation Users Workshop
    Geant4 has been used to simulate in high-resolution (10 micron thick voxels) the skin doses below 0.5 mm depth occurring in MRIgRT (6 MV photon beam, Varian 2100C). On the entry side lepton contamination removal has been studied to show potential skin dose reductions (at low magnetic field strengths). At high magnetic fields (>2 T) skin dose increases (up to 30% of dmax). In the exit region...
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  3. 24. Geant4-based studies to characterise the tissue-equivalence of SOI and diamond microdosimeter detectors, under development at CMRP.
    Dr S. Guatelli (CMRP, University of Wollongong, Australia)
    15/10/2009, 17:10
    Users' Workshop
    Oral presentation Users Workshop
    Silicon On Insulator (SOI) microdosimeters have been under investigation for the past ten years as a possible alternative to tissue equivalent gas counters for microdosimetric measurements in medical physics and radiation protection in earth labs, aviation and space, at Centre of Medical Radiation Physics, University of Wollongong. In the last 5-6 years, extensive Geant4-based simulation...
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  4. 108. Dosimetric study of photon dose distribution in lungs under different respiratory phases: comparison with GEANT4 simulations
    Dr Barbara Caccia (Technologies and Health Dept. Istituto Superiore di Sanità and INFN, Roma (Italy))
    15/10/2009, 17:30
    Users' Workshop
    Oral presentation Users Workshop
    The advances in oncological research have had an important impact on cancer patients survival, but there has been no major or dramatic improvement in long-term survival in the lung cancer despite more innovative treatment techniques and protocols implemented in radiation oncology. The problematic concerning dose calculation in the presence of in-homogeneities has already been afforded by...
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  5. 59. Implementation of a Monte Carlo - GEANT4 Simulation for the dosimetric study of electron beams produced by a mobile accelerator for IORT
    Dr Giorgio Russo (Laboratorio di Tecnologie Oncologiche (LATO) HSR Giglio, Cefalù (PA), Italy)
    15/10/2009, 17:50
    Users' Workshop
    Oral presentation Users Workshop
    In the last few years the use of ionising radiation has obtained a relevant role as a remedy for many types of tumour pathologies. Among the different radiation techniques the Intra Operative radiation therapy (IORT) is a new way to treat some tumours [1,2,3,4], consisting of exposing the surrounding involved tissues to a single high radiation dose during surgery after the obliteration of the...
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  6. 66. The role of Geant4 in the production of a database for an ion therapy Treatment Planning System
    Germano Russo (INFN (Istituto Nazionale di Fisica Nucleare), Dipartimento di Fisica Sperimentale - Università di Torino, Italy)
    15/10/2009, 18:10
    Users' Workshop
    Oral presentation Users Workshop
    In radiotherapy with carbon ions, the beam interaction with tissues has to be carefully estimated, since the spatial changes in the radiation quality due to fragmentation, energy loss and multiple scattering imply variations in the local radiobiological effectiveness. The information of dose deposition pattern alone is not sufficient to predict the biological effect of treatment: a...
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  7. 82. Geant4 based simulation of the Leksell Gamma Knife for treatment planning validation
    Dr Francesco Romano (Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Catania, Italy)
    15/10/2009, 18:30
    Users' Workshop
    Oral presentation Users Workshop
    The Monte Carlo code Geant4 has been used to simulate the Leksell Gamma Knife® and to verify its treatment planning system Leksell GammaPlan® (LGP). By means of this radiosurgical technique, intracranial lesions can be treated in a single session with high precision and critical brain structures can be protected. Radiation from 201 60Co sources comes through a collimation system to the target...
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