What is the organ most at risk when treating a tumor in the maxillary sinus?
Radiation to the vocal cords only
Treatment of early stage cancers of the true glottis includes...
Field includes tumor and regional lymphatics, VMAT technique, shrinking field boost
What is true regarding EBRT to the oropharynx?
one
Tumor of the alveolar ridge will likely drain to which level?
52
TD 5/5 of the femoral heads
Nulliparity
What is associated with increased estrogen exposure in a female's lifetime?
Intracavitary
Tandem and ovoid/ring brachytherapy for cervical cancer with an intact uterus is
considered
seizure
Focal sign of a brain tumor
histopathology of the tumor
Most important prognostic factor for patients with brain cancer
T4/T5
,What is the level of the carina?
Mets
Most common intracranial neoplasm
Grade
Brain cancer is classified by WHO according to what
Dmax
SSD technique dose is normalized to what
SSD
Changes in ___ does not affect TMR
Photon side
When matching photon/electron fields, where is the hotspot?
a. Feather the border and increase skin gap
Patient is receiving craniospinal irradiation with POP lateral brain fields and abutting PA
spine fields. There is a hotspot because of the abutting spine fields. How do you solve
this problem?
isocenter
SAD technique dose is normalized to ___
Increasing field size, increasing energy, increasing field size, decreasing depth
TMR increases with... (4)
monitor units
What is not included in a RT prescription?
ateriovenous malformation (AVM)
What is a benign lesion of the CNS?
Disease is multifocal
Whole brain radiation is commonly used to manage brain metastases because...
Penumbra
What increases with an increased source size?
Lateral bulging
,What is a characteristic of electron isodose lines?
nose and chin
When creating a thermoplastic mask what two areas do you focus on?
Increase beams average energy, penetration, and HVL
How does filtration affect beam energy, penetration and HVL?
grade
the strongest prognostic factor for a malignant brain tumor is ___
Some isodose lines bulge and some constrict
Matching electron fields on the chest wall is difficult because...
6
Multiple fractions in a day must be separated by ___ hours
air
You are treating a femur which requires extended SSD. If the SSD is 115 cm, where is
isocenter?
remake the compensator
A patient has a custom compensator. If you need to make a 5cm shift on the first day,
what are next steps?
10% for 20 MeV
X-ray contamination in an electron beam is...
small penumbra
Which of the following is the primary advantage of a LINACs small focal spot?
5
Beam shaping blocks should transmit no more than ___% of the original beam
left upper
The spleen is located in the ___ ___ quadrant
matrix size
In order to increase spatial resolution, one must increase the ___ ___
MRI
, What imaging is best used for soft tissue visualization?
DICOM
What image format is used to transfer images for fusion?
Klystron
What is the source of microwave power in a Varian LINAC?
Magnetron
What is the source of microwave power in an Elekta LINAC?
advanced directive
A living will is an example of an ___ ___
Decrease slice thickness
What can you do to increase the quality of a DRR?
Compton
What interaction is responsible for MV image formation?
heart
Adriamycin (Doxorubicin) is toxic to the ___
Cyclotron
What is used to accelerate protons and neutrons to achieve a clinically useful beam?
denial, anger, bargaining, depression, acceptance
Elizabeth Kubler ross stages of grief (5)
pixel
In CT, a 2-D dimensional picture element is referred to as the ___
voxels
Picture elements with slice thickness are ___
Violated HIPAA and Code of Ethics
A celebrity is being treated and a reporter asks you questions regarding the treatment.
What can they say you did?
lung
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