Devita, Hellman, and Rosenberg's Cancer

LWBK1006-07 LWW-Govindan-Review November 22, 2011 13:54

Chapter 7•Principles of Radiation Oncology 89

Question 7.18. Which of the following best describes the treatment planning process?

A. At the time of image acquisition for planning, tumor motion caused

by respiration must be determined.

B. Immobilization is not important because it does not add to accuracy.

C. Three-dimensional dose distribution in each patient is easily mea-

sured.

D. Intensity-modulated radiation therapy (IMRT) cannot control the

shaping of the dose distribution.

Question 7.19. Which of the following is NOT true regarding charged particle beams?

A. Charged particle beam therapy include proton and carbon based

therapy.

B. Protons have shown to confer a definite clinical benefit over photon

based therapies for most clinical cancer applications.

C. Ability of charged particles to stop at a given depth gives it a poten-

tial advantage for treatment of tumors in close proximity to critical

structures.

D. Current challenges involved with widespread use of charged particle

therapy include cost involved with production and operation of such

facility.