MDCB Practice Set 5 - Test 14 Exam
Questions With 100% Verified Answers
1. DICOM allows:
A. Imaging modalities and PACS to communicate in the same
language.
B. A networked group of computers to manage digital images.
C. X-ray absorber material and a charged coupled device to form an
image.
D. Improved image quality in digital portal films. -
correct answer ✅A
2. The Planning Target Volume provides margin around the Gross
Tumor Volume and/or Clinical Tumor Volume to
compensate for which of the following?
A. positive margins at tumor bed.
B. inconsistencies in physician drawing.
C. dose fall off.
D. variations in treatment setup. -
correct answer ✅D
3. The accuracy of a DVH depends on which of the following?
A. Normal Tissue Complication Probability Value
B. number of OARs assessed
,MDCB Practice Set 5 - Test 14 Exam
Questions With 100% Verified Answers
C. Biological Equivalent Dose
D. bin size of histogram -
correct answer ✅D
4. Which of the following concepts of 3-dimensional conformal
radiotherapy is/are correctly defined?
A. Differential DVH: Plot of a volume of a structure receiving a
certain dose as a function of dose
B. BEV: display of target and normal tissues parallel to the beam
C. GTV: gross demonstrable extent of tumor
D. PTV: true extent and location of disease -
correct answer ✅C
5. Which statement is true about the benefits of PET-CT for use in
Radiation Oncology treatment planning?
A. PET images show chemical or metabolic activity within the body.
B. PET images provide superior anatomical definition over CT
images.
C. PET images have an accuracy of 10-15 mm for anatomical
location.
, MDCB Practice Set 5 - Test 14 Exam
Questions With 100% Verified Answers
D. PET imaging is ideal for diabetic patients. -
correct answer ✅A
6. In megavoltage therapy, all beam modifying devices should be
placed at least 20.0 cm from the patient's skin surface
because:
A. the increase in half value layer (HVL) adversely affects skin dose.
B. alpha particles will not reach the skin's surface
C. percentage depth dose (PDD) is increased.
D. secondary electrons are scattered before reaching the patient. -
correct answer ✅D
7. When boosting the ethmoid sinus with electrons, where would
the hot spot(s) be expected to occur?
A. along the surface of the irregularity.
B. at the appropriate dmax for that energy.
C. at the bony interface.
D. along the air cavity interface. -
correct answer ✅D
Questions With 100% Verified Answers
1. DICOM allows:
A. Imaging modalities and PACS to communicate in the same
language.
B. A networked group of computers to manage digital images.
C. X-ray absorber material and a charged coupled device to form an
image.
D. Improved image quality in digital portal films. -
correct answer ✅A
2. The Planning Target Volume provides margin around the Gross
Tumor Volume and/or Clinical Tumor Volume to
compensate for which of the following?
A. positive margins at tumor bed.
B. inconsistencies in physician drawing.
C. dose fall off.
D. variations in treatment setup. -
correct answer ✅D
3. The accuracy of a DVH depends on which of the following?
A. Normal Tissue Complication Probability Value
B. number of OARs assessed
,MDCB Practice Set 5 - Test 14 Exam
Questions With 100% Verified Answers
C. Biological Equivalent Dose
D. bin size of histogram -
correct answer ✅D
4. Which of the following concepts of 3-dimensional conformal
radiotherapy is/are correctly defined?
A. Differential DVH: Plot of a volume of a structure receiving a
certain dose as a function of dose
B. BEV: display of target and normal tissues parallel to the beam
C. GTV: gross demonstrable extent of tumor
D. PTV: true extent and location of disease -
correct answer ✅C
5. Which statement is true about the benefits of PET-CT for use in
Radiation Oncology treatment planning?
A. PET images show chemical or metabolic activity within the body.
B. PET images provide superior anatomical definition over CT
images.
C. PET images have an accuracy of 10-15 mm for anatomical
location.
, MDCB Practice Set 5 - Test 14 Exam
Questions With 100% Verified Answers
D. PET imaging is ideal for diabetic patients. -
correct answer ✅A
6. In megavoltage therapy, all beam modifying devices should be
placed at least 20.0 cm from the patient's skin surface
because:
A. the increase in half value layer (HVL) adversely affects skin dose.
B. alpha particles will not reach the skin's surface
C. percentage depth dose (PDD) is increased.
D. secondary electrons are scattered before reaching the patient. -
correct answer ✅D
7. When boosting the ethmoid sinus with electrons, where would
the hot spot(s) be expected to occur?
A. along the surface of the irregularity.
B. at the appropriate dmax for that energy.
C. at the bony interface.
D. along the air cavity interface. -
correct answer ✅D
