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Radiotherapy with protons and carbon ions enables to deliver dose distributions of high conformation to the target. Treatment with helium ions has been suggested due to their physical and biological advantages. A reliable benchmarking of the employed physics models with experimental data is required for treatment planning. However, experimental data for helium interactions is limited, in part due...
Radiotherapy with scanned particle beams enables a highly precise dose conformity to the target region while surrounding healthy tissue is widely spared. This leads to increased demands on the verification of the applied parameters of the beam and treatment plans. In several studies the potential of the commercially available amorphous silicon flat-panel detector RID 256-L (Perkin Elmer, Germany),...
Due to the finite range of ions in matter and the presence of the Bragg-peak, ion beams provide highly localized dose distributions. In radiation therapy with ion beams, unpredictable changes within the patient can deteriorate the quality of the dose distribution in the target. Therefore it is desired to monitor the beam within the patient in a non-invasive way. In this contribution the information...
Radiotherapy with narrow 12C ion beams enables treatment of tumors with high precision while sparing the sur-rounding healthy tissue. Unpredictable changes in the patient's geometry can alter the ion range and result in changes in the dose distribution. Therefore, it is desirable to verify the actual dose delivery in the patient, preferably in real-time and in a non-invasive manner.
The finite range of ion beams in matter and the presence of the Bragg-peak at the end of their range enable to create highly localized dose distributions. This advantage represents at the same time a challenge - namely to control all factors influencing the dose distribution with high precision. To ensure the required quality of the dose distribution applied to the patient, a number of measurement...
Radiotherapy with carbon ion beams is a highly precise method for cancer treatment. This is due to the finite range and the relatively low lateral scattering of the carbon ions in comparison to protons. On their path through tissue, the carbon ions can undergo nuclear fragmentation, resulting in lighter projectile fragments. Since the biological effect of the fragments differs from the primary particles,...
This paper presents a novel technique allowing for the measurement and visualization of the spatial distribution and time evolution of the charge collection process in semiconductor sensors of ionizing radiation. The study was carried out with a pixelated high resistivity silicon sensor bump-bonded to the Timepix readout chip (256 × 256 pixels, with pitch of 55 µm). The sensor was irradiated with...
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