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Radiation Therapy Terminology Exam Questions with Latest Update
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Akimbo - Answer-Patients treated with hands above their heads AP/PA - Answer-Anteroposterior and Posteroanterior Aquaplast - Answer-Trade name for a thermoplastic that is frequently used as an immobilization device Beam modifiers - Answer-Devices that change the shape of the treatment fiel...

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  • October 7, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • radiation therapy terminology exam questions with
  • akimbo answer patients treated with hands above

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  • Radiation therapy

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Radiation Therapy Terminology Exam
Questions with Latest Update
Akimbo - Answer-Patients treated with hands above their heads

AP/PA - Answer-Anteroposterior and Posteroanterior

Aquaplast - Answer-Trade name for a thermoplastic that is frequently used as an
immobilization device

Beam modifiers - Answer-Devices that change the shape of the treatment field or
distribution of radiation at depth

BEV - Answer-Beams eye view

Blocks - Answer-Pieces of metal alloy that can be used to shape the radiation beam

Bolus - Answer-Materials that interact with the radiation beam in a way that mimics
tissue. Bolus comes in many forms and has many applications. Common materials
include paraffin wax, Vaseline gauze, wet gauze or towels, and water bags

Boost fields - Answer-Fields that are used to deliver a high dose to a small volume. With
boost fields the radiation dose is generally delivered to the gross tumor volume only,
excluding regional lymph nodes and organs at risk (OAR)

C2-3 - Answer-Control the head and neck, including movements forward, backward,
and to the sides. These nerves also play key roles in breathing. The C2 dermatome
handles sensation for the upper part of the head, and the C3 dermatome covers the
side of the face and behind the head

C7 - Answer-The seventh cervical vertebra, also called the vertebra prominens, is
commonly considered a unique vertebra and has the most prominent spinous process.
When feeling the back of the neck, the C7 vertebra's spinous process (bony hump)
sticks out more than the other cervical vertebrae

Central axis - Answer-Dividing the body vertically into equal right and left haves

Collimator - Answer-Arrangement of shielding material designed to define the "x" and
"y" dimensions of the beam of radiation

Conformal therapy - Answer-(CRT) Therapy that, with the use of three-dimensional
treatment planning, allows the delivery of higher tumor doses to selected target volumes
without increasing treatment morbidity

, Console - Answer-Monitoring and controlling of the linear accelerator occur at the
control console. Located outside the treatment room, the control console may take the
form of a digital display, push-button panel, and/or video display terminal (VDT) in which
the machine status and patient-treatment information are incorporated into the
computerized treatment unit

Coplanar - Answer-Geometrical principle describing two radiation fields configured in
such a way that the beam edges lie in the same plane. (Central ray is not parallel
opposed.)

Couch - Answer-Is mounted on a rotational axis around the isocenter. This permits the
positioning of a patient lying supine or prone on the treatment couch

Craniospinal Irradiation (CSI) - Answer-Complex irradiation of all central nervous
system and cerebrospinal fluid regions from behind the eye down to the midsacrum for
treatment of medulloblastoma and other cerebrospinal fluid seeding tumors

CTV - Answer-Clinical Target Volume

CV - Answer-Couch Vertical

Daily treatment record - Answer-Includes:
-Date
-Time out performed
-Daily and cumulative doses to all prescription, critical structure, and anatomic reference
points
-Fraction number and elapsed days
-Treatment aids
-Verification imaging

Desquamation - Answer-Skin peeling, is the shedding of the outermost membrane or
layer of a tissue, such as the skin

Divergence - Answer-Divergence is the spreading out of the beam of radiation. Farther
from the source, the more the beam has spread

Dosimeter badge - Answer-Used for monitoring cumulative radiation dose due to
ionizing radiation

DRR - Answer-Digitally reconstructed radiograph

Dmax - Answer-Dose maximum

Dose volume histogram - Answer-Histogram relating radiation dose to tissue volume in
radiation therapy planning. DVHs are most commonly used as a plan evaluation tool
and to compare doses from different plans or to structures

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