Mock Exam questions Correct
Questions And Answers
If a linear accelerator is properly calibrated, the field size indicated at the control
console will correspond to the size of the field at the:Correct Answers Mechanical
Isocenter
A patient is treated with parallel-opposed mantle and paraortic fields of lengths 30 cm
and 15 cm respectively. Calculate the gap required on the surace for the beams to
intersect at the midline depth of 10 cm, SSD 100Correct Answers 2.25 cm
(30/2 X 100/10)+(15/2 X 100/10)
While treating a patient on a linear accelerator. an equipment malfunction causes the
main circuit breaker to be tripped. The therapist should do all fo the following EXCEPT:
A: immediately remove the patient from the treatment room
B: Record treatment dosage recieved on the mechanical counter
C: Resent circuit breaker and continue treating
D. Calculate required remaining doseageCorrect Answers immediately remove the
patient from the treatment room
While the frequency of acquiring digital or hard copy portal images varies, they should
all be aquiredCorrect Answers prior to or on the first day of treatment
The approximate 5 year survival rate for stage II (T4 N0 M0) colorectal cancer isCorrect
Answers 60-85%
The TD 5/5 for the rectum isCorrect Answers 6000 cGy
Gadolinium is a common contrast agent utilized for which diagnostic study?Correct
Answers 6000 cGy
Which of the following is not an item checked during daily warm-up of the linear
accelerator?Correct Answers MRI
If a patient has been prescribed 120 cGy/fraction b.i.d. to a total dose of 6000 cGy. How
many fractions remain after delivering 1800 cGy?Correct Answers 35
Wedge angle refers to:Correct Answers angle through which an isodose curve is tilted
at the central axis at a specific depth
The normal prostate is located:
anterior to rectum
inferior to bladder
,posterior to the symmphysisCorrect Answers all
The greatest occurrence of salivary neoplasms are found in theCorrect Answers parotid
gland
As identified in the treatment plan, which volume is the largest?Correct Answers
Irradiated Volume
IF a patient begins to cough vigorously during treatment delivery, the RT shouldCorrect
Answers stop the treatment and check on the patient and portal alignment
Radiographyically, which primary lesion can be described as having a sunburst
appearance?Correct Answers Osteosarcoma
The most frequent site of a soft tissue sarcoma metastases isCorrect Answers lung
Which of the following is not a pathogen?
A: viruses
B: protozoans
C: fungi
D: fomitesCorrect Answers D
The Philadelphia chromosome is associated with which leukemia?Correct Answers
CML
The intersection point of the axis of rotation of the collimator and the axis of rotation of
the gantry defines what?Correct Answers Mechanical isocenter
The first sign of the acute radiation syndrome following a large exposure of radiation is
usuallyCorrect Answers Nausea
This is a common oncologic emergency associated with cancer. Presenting symptoms
include fatigue, lethargy, weakness, nausea, dehydration, and decreased mental
fuctionCorrect Answers Hypercalcemia
The majority of larynx tumors arise on this areaCorrect Answers glottis
Acute radiation effects include all of the following EXCEPT:
A: diarrhea
B: erythema
C: epilation
D: radiation pneumonitisCorrect Answers D
Which is the main advantage of used a split beam technique? (1/2 beam
blocking)Correct Answers preventing beam divergence
, Which of the following would serve as the best method for protection from a high-energy
gamma sourceCorrect Answers increasing distance from source
A radiotherapy patient has
right to confidentiality of all info regarding their care
right to refuse treatmentCorrect Answers both
An ataxic patient is said to beCorrect Answers lacking coordination
The doctrine that holds an employer liable for negligent acts of employees is described
asCorrect Answers doctrine of respondeat superior
Inferiority, the spinal cord terminates at which levelCorrect Answers L2
Dose rate increasesCorrect Answers with increased field size
The practical range (max dose) for 6 MeV electrons isCorrect Answers 3cm
The use of a finger or ring badge monitoring is a particular importance to those persons
involved with theCorrect Answers handling of radionuclitides
The radiation safety officer must be notified if a personnel monitoring device isCorrect
Answers lost
damaged
left in vault during treatment
Characteristic radiation occurs whenCorrect Answers
Which of the following describes infection transmitted via droplet nuclei, dust particles,
or skin squamesCorrect Answers airborne transmission
the acceptable limit for linear accelerator jaw symmetry isCorrect Answers 2 mm
The most common pathologic subtype for melanoma of the skin isCorrect Answers
superficial spreading
The TD 5/5 for the whole kidney isCorrect Answers 2000-2500 cGy
Variation of output of a linear accelerator by more than 3% from the baseline
usuallyCorrect Answers requires notification of the physics staff
Hyperfractionated (bid) radiotherapy is becoming standard in the management of
certain cancer patients. The minimum interval between dose factions should beCorrect
Answers 6 hrs
300 rem is equivalent to ____ svCorrect Answers 3 sv
Questions And Answers
If a linear accelerator is properly calibrated, the field size indicated at the control
console will correspond to the size of the field at the:Correct Answers Mechanical
Isocenter
A patient is treated with parallel-opposed mantle and paraortic fields of lengths 30 cm
and 15 cm respectively. Calculate the gap required on the surace for the beams to
intersect at the midline depth of 10 cm, SSD 100Correct Answers 2.25 cm
(30/2 X 100/10)+(15/2 X 100/10)
While treating a patient on a linear accelerator. an equipment malfunction causes the
main circuit breaker to be tripped. The therapist should do all fo the following EXCEPT:
A: immediately remove the patient from the treatment room
B: Record treatment dosage recieved on the mechanical counter
C: Resent circuit breaker and continue treating
D. Calculate required remaining doseageCorrect Answers immediately remove the
patient from the treatment room
While the frequency of acquiring digital or hard copy portal images varies, they should
all be aquiredCorrect Answers prior to or on the first day of treatment
The approximate 5 year survival rate for stage II (T4 N0 M0) colorectal cancer isCorrect
Answers 60-85%
The TD 5/5 for the rectum isCorrect Answers 6000 cGy
Gadolinium is a common contrast agent utilized for which diagnostic study?Correct
Answers 6000 cGy
Which of the following is not an item checked during daily warm-up of the linear
accelerator?Correct Answers MRI
If a patient has been prescribed 120 cGy/fraction b.i.d. to a total dose of 6000 cGy. How
many fractions remain after delivering 1800 cGy?Correct Answers 35
Wedge angle refers to:Correct Answers angle through which an isodose curve is tilted
at the central axis at a specific depth
The normal prostate is located:
anterior to rectum
inferior to bladder
,posterior to the symmphysisCorrect Answers all
The greatest occurrence of salivary neoplasms are found in theCorrect Answers parotid
gland
As identified in the treatment plan, which volume is the largest?Correct Answers
Irradiated Volume
IF a patient begins to cough vigorously during treatment delivery, the RT shouldCorrect
Answers stop the treatment and check on the patient and portal alignment
Radiographyically, which primary lesion can be described as having a sunburst
appearance?Correct Answers Osteosarcoma
The most frequent site of a soft tissue sarcoma metastases isCorrect Answers lung
Which of the following is not a pathogen?
A: viruses
B: protozoans
C: fungi
D: fomitesCorrect Answers D
The Philadelphia chromosome is associated with which leukemia?Correct Answers
CML
The intersection point of the axis of rotation of the collimator and the axis of rotation of
the gantry defines what?Correct Answers Mechanical isocenter
The first sign of the acute radiation syndrome following a large exposure of radiation is
usuallyCorrect Answers Nausea
This is a common oncologic emergency associated with cancer. Presenting symptoms
include fatigue, lethargy, weakness, nausea, dehydration, and decreased mental
fuctionCorrect Answers Hypercalcemia
The majority of larynx tumors arise on this areaCorrect Answers glottis
Acute radiation effects include all of the following EXCEPT:
A: diarrhea
B: erythema
C: epilation
D: radiation pneumonitisCorrect Answers D
Which is the main advantage of used a split beam technique? (1/2 beam
blocking)Correct Answers preventing beam divergence
, Which of the following would serve as the best method for protection from a high-energy
gamma sourceCorrect Answers increasing distance from source
A radiotherapy patient has
right to confidentiality of all info regarding their care
right to refuse treatmentCorrect Answers both
An ataxic patient is said to beCorrect Answers lacking coordination
The doctrine that holds an employer liable for negligent acts of employees is described
asCorrect Answers doctrine of respondeat superior
Inferiority, the spinal cord terminates at which levelCorrect Answers L2
Dose rate increasesCorrect Answers with increased field size
The practical range (max dose) for 6 MeV electrons isCorrect Answers 3cm
The use of a finger or ring badge monitoring is a particular importance to those persons
involved with theCorrect Answers handling of radionuclitides
The radiation safety officer must be notified if a personnel monitoring device isCorrect
Answers lost
damaged
left in vault during treatment
Characteristic radiation occurs whenCorrect Answers
Which of the following describes infection transmitted via droplet nuclei, dust particles,
or skin squamesCorrect Answers airborne transmission
the acceptable limit for linear accelerator jaw symmetry isCorrect Answers 2 mm
The most common pathologic subtype for melanoma of the skin isCorrect Answers
superficial spreading
The TD 5/5 for the whole kidney isCorrect Answers 2000-2500 cGy
Variation of output of a linear accelerator by more than 3% from the baseline
usuallyCorrect Answers requires notification of the physics staff
Hyperfractionated (bid) radiotherapy is becoming standard in the management of
certain cancer patients. The minimum interval between dose factions should beCorrect
Answers 6 hrs
300 rem is equivalent to ____ svCorrect Answers 3 sv
