Figures
- Figure 1
A multileaf collimator used to form the treatment beams.
- Figure 2
After fractionated radiotherapy, tumour cells are not capable of the same degree of repair as normal tissue cells. In the ideal situation, all tumour cells are eliminated while normal tissue is spared.
- Figure 3
The optimal dose is that which causes maximal tumour damage while sparing normal tissue. Due to different goals in effect and a different willingness to risk side-effects, doses for palliative treatment are typically lower.
- Figure 4
A linear accelerator. The gantry is shown above the table. Depending on the treatment plan, the gantry rotates around the table to deliver the planned dose.
- Figure 5
The defintion of the target volume by gross (GTV), clinical (CTV), intrafraction (ITV) and planning (PTV) target volume.
- Figure 6
Mask for head immobilisation. Masks may also cover the shoulder region.
- Figure 7
Lines as positions markers for external beam radiotherapy. The treatment couch is too low in this image. When it is moved up; the patient will be in the correct treatment position.
- Figure 8
Lung cancers may cause pain, bleeding, atelectasis and mediastinal involvement with a variety of symptoms. Many of these can be treated succesfully with radiotherapy.
