RTT 300 Exam 3 Questions And Answers
must be signed by pt's physician - Answer all pages on which the treatment prescription
is _
quality management of the treatment & prescription - Answer pt's history, dx study,
rationale behind the tx, informed consent, tx delivery
info. needed in tx & prescription pages - Answer pt identification, physician signature, tx
planning data, daily treatment record, pt monitoring
Daily tx record-tx number, elapsed days, daily dose, cumulative dose, verification
imaging
Orthogonals and port films-weekly verification imaging types
Face page, prescription, tx page, simulation, dosimetry, pathology, radiology, nursing,
correspondence-Rad Onc chart components
Simulation page of chart -tx machine parameters, films, set up instructions - field size,
gantry angle, positioning, immobilization, etc.
dosimetry page of chart - Answer isodose charts, special requests from dept + those
from physics, wedge diagrams, bolus/ compensators, etc
correspondence page of chart - Answer outside report from physicians, reports from
dept to outside facilities, notes
planned treatment volume (PTV) - Answer usually larger than the target volume by
, encompassing additional margins due to tx technique -> CTV + margins for pt motion,
beam penumbra, set-up differences
treated volume - Answer the tissue volume enclosed by isodose surface, specified by
the radiation oncologist, that is planned to receive a dose selected as being appropriate
to achieve the purpose of tx
gross tumor volume (GTV) - Answer palpable or visible tumor
clinical target volume (CTV) - Answer tumor + surrounding volume of tissue that may
contain subclinical or microscopic disease (edema, necrosis)
contour - Answer external reproduction of a patient's body shape done at the end of
simulation after the treated volume is determined
solder wire, CT, MRI, platic tubes, plaster of Paris - Answer ways to make a contour
planes through which a contour can be taken - Answer tranverse (thru CAX), coronal,
sagittal, off-axis
transverse plane contour - Answer used for minimal changes in topography
Coronal plane contour - Response used when parallel beams and vertexes enter the pt
must include right and left sides of the body
Sagittal plane contour - Response useful for visualizing the spine
Off-axis contour - Response used when contour varies over a few cm (H&N) primarily
through CT, MRI, US, and simulator (orthogs)
purpose of contours - Answto provide the therapist and dosimetrist with the most
accurate model of the pt's body contour -> ensure correct information for performing
dose distribution within patient