TP3 Exam 1 Questions With Correct Answers

IMRT stands for Intensity Modulated Radioactive Treatment. - ANS False VMAT is rotational IMRT. - ANS True The best energy for IMRT is: - ANS 6MV Neutrons are produced in the accelerator at energies of: - ANS 15MV Neutrons are a planning and shielding concern with energies of what and higher? - ANS 15 MV The best energy to use for IMRT to ensure the minimal penumbra is: - ANS 6MV IMRT plans with greater than what number of beams show little gain in plan quality? - ANS 9 beams The penalty with IMRT Optimization is called: - ANS Cost function The weighting parameter or priority level with the IMRT penalty is: - ANS Multiplicative The convolution equation for dose calculation is based on convolving the TERMA with: - ANS Dose Kernals Which of the following is when a transplant occurs from a donor/patient with reinfusion of the native HSCs back into the donor? This occurs when nothing is being transferred between different individuals. - ANS Autologous Which of the following are special considerations when talking about Total Body Irradiation? - ANS Dose Uniformity There are multiple techniques when treating TBI? - ANS True The average dose minimum for Upper Lung is? - ANS 11.8 Gy The commissioning data related to TBI Sp is? - ANS a. Within 3% b. Within 1% c. Within 2% Which of the following has to do with compensatory thickness design? - ANS a. Field size b. Depth of the point dose compensation c. Compensator material used Implementation of Sc involves? - ANS Measured in Air Adverse reactions during TMI treatment in the Late stages are: - ANS Sterility c. Lung and heart problems Late Adverse reactions to TBI involve all but? - ANS a. Kidney disfunction b. Cataracts c. Xerostomia 80% of patients undergoing myeloablative TBI have oral mucositis as a side effect? - ANS False IGRT stands for Image Guided Radiation Therapy. - ANS True One advantage of KVCT is that it has better contrast than MVCT. - ANS False MVCT is advantageous over KVCT when dealing with: - ANS metal artifact Portal Imagers use what type of detector? - ANS Amorphous Silicon Tomotherapy uses what type of detectors for the MVCT? - ANS Xenon Gas Detectors To increase contrast, Tomotherapy uses what energy with MVCT. - ANS 3.5MV The resolution of KVCT is about: - ANS 0.5mm The resolution of MVCT is about: - ANS 1mm-2mm Doses with KVCT are about: - ANS 1-3cGy Lung is an ideal body site for IMRT. - ANS False Dose heterogeneity to the target is not uncommon for lung IMRT. - ANS true It is always best practice to treat Lung IMRT with 5, 7, or 9 equally spaced fields. - ANS False Lung IMRT plans should be normalized to: - ANS a point not in gradient a target volume When defining the PTV, the SM and IM are based on the same criteria. - ANS False A common RTOG bladder constraint for a prostate IMRT is? - ANS b. V25% @ 7500 cGy FCCC common Bladder constraint for a prostate is V25% @ 40Gy? - ANS