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You did a CT simulation on your patient’s abdomen for treatment of the pancreatic head. The mass on the scan image is 2.87cm. The lesion’s true size is 2.54 cm. What is the object percentage of magnification?

You did a CT simulation on your patient’s abdomen for treatment of the pancreatic head. The mass on the scan image is 2.87cm. The lesion’s true size is 2.54 cm. What is the object percentage of magnification?

A secondary electron that is produced that can cause further ionization is a called a

The removal of the flattening filter during megavoltage treatments will

Field separation can be accomplished either dosimetrically or geometrically. Which of the following best describes dosimetric field separation? 

EXTRA CREDIT: For droplet transmission, because of their size, they typically travel a distance of 

The use of cone-beam computed tomography imaging for isocenter verification uses what type of algorithm to reconstruct volumetric images? 

EXTRA CREDIT: Tenesmus is a clinical presentation that is associated with

The detection of respiratory motion and dynamic repositioning of the radiation beam in order to follow the tumor’s changing position is called 

A radiation therapist is standing 28 cm from a radioactive source, which is resulting in an exposure rate of 9 mR/hour. In order to reduce the exposure rate to 0.06 mR/hour, at what distance must the therapist be standing?