Summary CTP 1 Exam 2 Questions with Complete Solutions (Latest 2025)

CTP 1 Exam 2 Questions with Complete
Solutions (Latest 2025)
PDD equation - Correct Answers ✅(Dd/Ddmax) * 100


profile - Correct Answers ✅dose profile of field laterally,
dose vs position


isodose normalization - Correct Answers
✅(100/normalization percentage) * 100


purpose of wedges - Correct Answers ✅tilt the isodose
line, compensate for missing tissue


wedge angle definition - Correct Answers ✅depth where
50% line is, depth of 10 cm


wedge angle ______ with depth - Correct Answers
✅decreases


factors affecting compensators - Correct Answers ✅-
energy
- field size
- depth
- compensator shape


partial transmission blocks - Correct Answers ✅older
technique that uses cerrobend

, CTP 1 Exam 2 Questions with Complete
Solutions (Latest 2025)

HVL of cerrobend - Correct Answers ✅15 mm


AP:PA hot spots - Correct Answers ✅4x : 20%
6x : 15%
10x : 12%
15x : 10%
18x : 8%


integral dose - Correct Answers ✅minimize total dose to
patient and reduce toxicity


integral dose equation - Correct Answers ✅mass * dose


MU Electron Equation - Correct Answers ✅MU = Rx
Dose/(CF * ROF * ISL * Norm)


ISL correction - Correct Answers ✅needed if SSD is not 100
cm
(100/SSD value)^2


VSD - Correct Answers ✅needed for extended distances
((VSD + d)/(VSD + dm + gap))^2