Hybrid VMAT-3DCRT as breast cancer treatment improvement tool.

Radiation therapy is an important tool in the treatment of breast cancer and can play a crucial role in improving patient outcomes. For breast cancer, if the technique has been for a long time the use of 3DCRT, clinicians have seen the management evolve greatly in recent years. Field-in-field and IMRT approaches and more recently dynamic arctherapy are increasingly available.

Biological effects and equivalent doses in radiotherapy: A software solution.

Background: The limits of TDF (time, dose, and fractionation) and linear quadratic models have been known for a long time. Medical physicists and physicians are required to provide fast and reliable interpretations regarding delivered doses or any future prescriptions relating to treatment changes.

Aim: We, therefore, propose a calculation interface under the GNU license to be used for equivalent doses, biological doses, and normal tumor complication probability (Lyman model).

Dosimetric uncertainties related to the elasticity of bladder and rectal walls: adenocarcinoma of the prostate.

Purpose: Radiotherapy is an important treatment for prostate cancer. During treatment sessions, bladder and rectal repletion is difficult to quantify and cannot be measured with a single and initial CT scan acquisition. Some methods, such as image-guided radiation therapy and dose-guided radiation therapy, aim to compensate this missing information through periodic CT acquisitions.

Therapeutic potential of atmospheric neutrons.

Background: Glioblastoma multiform (GBM) is the most common and most aggressive type of primary brain tumour in humans. It has a very poor prognosis despite multi-modality treatments consisting of open craniotomy with surgical resection, followed by chemotherapy and/or radiotherapy. Recently, a new treatment has been proposed - Boron Neutron Capture Therapy (BNCT) - which exploits the interaction between Boron-10 atoms (introduced by vector molecules) and low energy neutrons produced by giant accelerators or nuclear reactors.

[Dose comparison between three planing prostate: 3D conformational radiotherapy, coplanar arctherapy and non-coplanar arctherapy].

Purpose: Comparative study between a classical conformational prostate radiotherapy (3DRTC) and two arctherapy techniques, a coplanar (AT-C) and the other non-coplanar (AT-NC).

Patients And Methods: The comparison has been made retrospectively on 30 patients with localized prostate cancer (T2-T3a, PSA< 20 ng/ml, Gleason<7). The objective criteria for comparison were the NTCP, EUD, and dose volume (on DVH), for the volumes of bladder wall, rectal wall, femoral heads, small bowel, prostate (P) and seminal vesicles (VS).