FCA EXAM QUIESTIONS 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:
Mechanical Isocenter
A patient is treat
...
FCA EXAM QUIESTIONS 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:
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 100
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 doseage
immediately remove the patient from the treatment room
While the frequency of acquiring digital or hard copy portal images varies, they
should all be aquired
prior to or on the first day of treatment
The approximate 5 year survival rate for stage II (T4 N0 M0) colorectal cancer is
60-85%
The TD 5/5 for the rectum is
6000 cGy
Gadolinium is a common contrast agent utilized for which diagnostic study?
6000 cGy
Which of the following is not an item checked during daily warm-up of the linear
accelerator?
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?
35
Wedge angle refers to:
angle through which an isodose curve is tilted at the central axis at a specific dept
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