Dosimetry: Module 5 Exam Actual
Questions and Answers 2026
Purpose and Function of Dosimetry (3) -
correct answer ✅To make recommendations to the physicians
regarding possible treatment approaches (to create plans)
To provide a Continuing Quality Improvement program - this is
done via chart checks to ensure treatment is being delivered per
the physicians prescription and follows the plan laid out by
dosimetry
To assist in the set-up and delivery of treatment via consulting in
the simulator, treatment room, or physician work room
The 3 Main Goals of Treatment Planning -
correct answer ✅1. Develop a plan that treats the tumor volume
-this plan should give as homogeneous a dose distribution as
possible throughout the target volume.
2. Minimize radiation dose to healthy structures
-areas outside the target should receive as little radiation as
possible.
,Dosimetry: Module 5 Exam Actual
Questions and Answers 2026
-this requires knowledge of how much radiation the tissues in the
treatment field can tolerate.
-dose levels to critical structures such as spinal cord, kidneys, and
lens of the eyes must be minimized
3. Provide a permanent record of dose calculations and
distributions so that others in the future understand the plan
-this should include prescriptions, diagrams of treatment fields,
tattoo identification simulation of portal films, and all relevant MU
calcs.
-this record may become important if the patient needs to receive
more radiation in the future.
Visualization -
correct answer ✅determination of the location and extent of
tumor with respect to anatomical landmarks.
i.e. palpation, radiography, radiographic imaging CT, MR, PET,
Ultrasound etc.
, Dosimetry: Module 5 Exam Actual
Questions and Answers 2026
Localization & Simulation -
correct answer ✅The determination radiographically, of the field
borders, required to encompass the target volume.
Flouro Sim or CT Sim.
We should always have orthogonal films to determine x, y, z planes
of a patients anatomy.
Selection & Placement -
correct answer ✅dosimetrist selects field sizes and beam
placement to deliver a homogenous dose to the target while
limiting dose to normal structures as best as possible.
Verification -
correct answer ✅this final step ensures that the volumes planned
for treatment are actually the areas being treated. Plan double
check and portal images.
SSD -
correct answer ✅Source to Surface Distance Beam parameters are
defined at the skin surface
Questions and Answers 2026
Purpose and Function of Dosimetry (3) -
correct answer ✅To make recommendations to the physicians
regarding possible treatment approaches (to create plans)
To provide a Continuing Quality Improvement program - this is
done via chart checks to ensure treatment is being delivered per
the physicians prescription and follows the plan laid out by
dosimetry
To assist in the set-up and delivery of treatment via consulting in
the simulator, treatment room, or physician work room
The 3 Main Goals of Treatment Planning -
correct answer ✅1. Develop a plan that treats the tumor volume
-this plan should give as homogeneous a dose distribution as
possible throughout the target volume.
2. Minimize radiation dose to healthy structures
-areas outside the target should receive as little radiation as
possible.
,Dosimetry: Module 5 Exam Actual
Questions and Answers 2026
-this requires knowledge of how much radiation the tissues in the
treatment field can tolerate.
-dose levels to critical structures such as spinal cord, kidneys, and
lens of the eyes must be minimized
3. Provide a permanent record of dose calculations and
distributions so that others in the future understand the plan
-this should include prescriptions, diagrams of treatment fields,
tattoo identification simulation of portal films, and all relevant MU
calcs.
-this record may become important if the patient needs to receive
more radiation in the future.
Visualization -
correct answer ✅determination of the location and extent of
tumor with respect to anatomical landmarks.
i.e. palpation, radiography, radiographic imaging CT, MR, PET,
Ultrasound etc.
, Dosimetry: Module 5 Exam Actual
Questions and Answers 2026
Localization & Simulation -
correct answer ✅The determination radiographically, of the field
borders, required to encompass the target volume.
Flouro Sim or CT Sim.
We should always have orthogonal films to determine x, y, z planes
of a patients anatomy.
Selection & Placement -
correct answer ✅dosimetrist selects field sizes and beam
placement to deliver a homogenous dose to the target while
limiting dose to normal structures as best as possible.
Verification -
correct answer ✅this final step ensures that the volumes planned
for treatment are actually the areas being treated. Plan double
check and portal images.
SSD -
correct answer ✅Source to Surface Distance Beam parameters are
defined at the skin surface
