Hôpital CHAHIDS MAHMOUDI

Radiotherapy

Treatment techniques (clinical routine) :

SSimulation on PET/CT: ENT/Lung/Cervix cancer

It presents the advantage of having a better definition of the tumor volumes ; consequently an increasing of the dose at the level of the tumor and a better sparing of healthy tissues, thus, improving the effectiveness of the treatment.

Stereotactic radiotherapy : / Radiosurgery :

Radiochirurgie stéréotaxique crânienne(SRS)

Stereotactic radiotherapy is based on the principle of using ionizing radiation to destroy cancer cells in a single session (SRS radiosurgery) or in 3 to 5 sessions (Steretactic radiotherapy SRT). There are different treatment techniques including Dynamic Arc Therapy (AD) and Intensity Modulated Arc Therapy (VMAT) which are commonly used for SRS/SRT. To exploit effectively the benefits of SRS, a high precision is needed, the processing requires an overall precision of approximately 1mm. Historically, SRS referred to the targeting of intracranial lesions. Stereotactic radiosurgery can be performed in several modalities and has been applied to a number of benign and malignant malformations. en une seule séance.

Radiochirurgie stéréotaxique crânienne (SRT)

Management of inoperable brain deseases:

MAV.
Schwannoma.
Neuralgia, trigeminal nerve.
Small brain tumors.

Treatment of multiple brain metastases.

A high definition collimation system.

An ultra-precise repositioning system.

A software package dedicated for radiosurgery.

A dedicated staff (4 physicists, 1 radiotherapist, 1 neurosurgeon, 3 radiologists, 3 IT engineers).

An advanced imaging platform.

HDR Ir-192 curietherapy:

This high-precision technique is based on 2 technological advances. On the one hand, the distribution of source projectors which ensure the radiation protection of the staff and the visitors, and to move a miniaturized radioactive source of iridium 192 in "steps" of 5 mm. On the other hand, the development of dosimetry software authorizing the use of CT and MRI to delineate tumor targets, identify healthy organs to avoid (bladder, rectum, sigmoid) and plan treatment. It is also possible by modulating the proposal and the downtime of the source, to individualize the dose distribution and to escalate the dose delivered to the tumor.

Respiration-dependent radiotherapy (Gating).

When planning radiotherapy, special attention should be paid to respiratory movements when irradiating the thoracic region (lung and breast cancer). Gating makes it possible to better adapt the irradiation fields to the tumor and thus protect certain critical organs (lungs, heart, etc.) It is a complementary optimization tool for other innovative techniques, such as conformational radiotherapy, with and without intensity modulation.