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.
