3D Scanner

3. measurements made in the 3D scanner are considered as such as they are made in water and will set the linac baseline
5. casual name given to the major periodic machine QA session during which all major beam parameters must be controled and compared to the baseline
6. type of detectors most commonly used in the 3D scanner for Beam commissioning (reference detector)
8. type of detectors used in the 3D scanner for small fields sizes (because of its better response than IC), itcan require specific setting for measurements
9. A second verification carried out for planned treatments using a monitor unit verification or dose calculation independent software
10. Software used to plan patient treatment. It is commissionned using the data set measured in the 3D scanner
12. To insure the consistency of the linac performances based on the initial commissioning measurements

1. An area treated by the radiation beam at a particular angle. Both light or dosimetric. it is shaped either by the jaws or the MLC
2. measurments made using relative values. The measured dose at all points is compared to one selected spatial point called "normalization point"
4. a process where a full set of data is acquired to be used to characterize the linac in the treatment planning system and create a baseline
7. usually requires additional measurements (in specific conditions) in the 3D scanner to add beam information into the TPS for accurate planned dose calculation (e.g. SRS)
11. A type of radiation therapy that uses x-rays or gamma rays that come from a special machine called a linear accelerator (linac)