Radiotherapy

Glioblastoma

The patient is treated radically with external beam radiotherapy and concurrent temozolomide. 60 Gy in 30 fractions is prescribed.

In elderly patients, a hypofractionated course is sometimes used (40 Gy in 15 fractions).

Pre-simulation, informed consent is obtained.

The patient is simulated supine with the head in a neutral position.

Immobilisation is with a thermoplastic mask.

A CT scan is obtained through the region of interest.

The CT scan is fused with the pre-operative MRI scan.

A 3D-conformal technique is used.

The GTV is the contrast enhancing lesion.

The CTV is a 2 cm expansion from the GTV, respecting tissue planes.

The PTV is a 0.3 cm expansion from the CTV.


Anaplastic Astrocytoma

The patient is treated radically with external beam radiotherapy followed by sequential temozolomide. 60 Gy in 30 fractions is prescribed.

Pre-simulation, informed consent is obtained.

The patient is simulated supine with the head in a neutral position.

Immobilisation is with a thermoplastic mask.

A CT scan is obtained through the region of interest.

The CT scan is fused with the pre-operative MRI scan.

A 3D-conformal technique is used.

The GTV is the contrast enhancing lesion.

The CTV is a 2 cm expansion from the GTV, respecting tissue planes.

The PTV is a 0.3 cm expansion from the CTV.


Anaplastic Oligodendroglioma

The patient is treated radically with external beam radiotherapy and sequential PCV chemotherapy. 60 Gy in 30 fractions is prescribed.

Pre-simulation, informed consent is obtained.

The patient is simulated supine with the head in a neutral position.

Immobilisation is with a thermoplastic mask.

A CT scan is obtained through the region of interest.

The CT scan is fused with the pre-operative MRI scan.

A 3D-conformal technique is used.

The GTV is the contrast enhancing lesion.

The CTV is a 2 cm expansion from the GTV, respecting tissue planes.

The PTV is a 0.3 cm expansion from the CTV.


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