Author: Anonymous

Which of the following statements is true of kilovoltage x-ray units on a linear accelerator?

Stereotactic radiosurgery therapy involves  

Calculate the monitor units for each portal of an AP/PA abdomen with a 12 cm x 16 cm field with an SSD of 100 cm, treated to midplane to a depth of 7 cm. The collimator scatter factor is 1.08, the phantom scatter factor is 1.007, the percentage depth dose is 76%, the tumor target is 180 cGy. 

EXTRA CREDIT: To avoid exceeding the dose limits to the kidneys, which of the following techniques can be employed to threat the pancreas?

A patient is being treated on a 10 MV linear accelerator at 100 SSD with a reference dose rate of 0.997 cGy/MU. The collimator setting is 12 x 12 with a scatter factor of 1.005. The blocked field has an equivalent factor square of 6 x 6 with a phantom scatter of 0.995. The dose to be delivered is to a depth of 6.5 cm with a percentage depth dose of 81.3. The prescribed dose is 250 cGy per fraction. The doctor orders a parallel opposed AP/PA. What is the MU for each portal?

BrainLab is the use of

EXTRA CREDIT: The force between two charged particles is called the

EXTRA CREDIT: The representation of volumetric or planar variations in absorbed dose at different levels are depicted by means of 

Which of the following brachytherapy treatment planning systems is often used for calculating line sources?

The basic difference between conventional radiotherapy using three dimensional non-intensity modulated conformal therapy and intensity modulated therapy is