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CRO-CT Exam Part 9 Questions & Answers 2024/2025 $8.49   Add to cart

Exam (elaborations)

CRO-CT Exam Part 9 Questions & Answers 2024/2025

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CRO-CT Exam Part 9 Questions & Answers 2024/2025 Goals of simulation - ANSWERSto identify location of tumor and its relationship to surrounding anatomy -to determine the ideal pt position Conventional Sim - ANSWERS-pt set up in establish tx position -field size marked on pt -setup docume...

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  • August 5, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CRO-CT
  • CRO-CT
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CRO-CT Exam Part 9 Questions &
Answers 2024/2025

Goals of simulation - ANSWERSto identify location of tumor and its relationship to surrounding anatomy

-to determine the ideal pt position



Conventional Sim - ANSWERS-pt set up in establish tx position

-field size marked on pt

-setup documented

-only contour taken at central axis

-needed orthogonal images to find isocenter

-fluoroscopy



Borders - ANSWERSused to be very standardized and could include healthy tissue



Fluoroscopy - ANSWERS-live-x-ray

-push pedal and plays x-rays

-can see pts moving around

-can see them swallowing



Virtual Sim - ANSWERSCT



3D planning - ANSWERS-anatomy better visualized

-tx plans conform to true tumor vol

-increased dose to tumor and decreased dose to normal tissue

-have outlines that are diff colors for diff doses

, 5 Major advantages of CT over conventional sim - ANSWERS-better visualization of anatomy

-helps increase tx dose

-helps minimize dose to surrounding critical structures

-ability to simulate hard to verify tx portals

-DRRS allow image manipulation



Disadvantages of CT - ANSWERS-bore size can limit pts position

-loss of real time imaging



CT Sim table - ANSWERS-must be identical to tx table

-concave tables must be modified



CT Gantry - ANSWERS-has bore

-field of view (actual width of imaging capability, 20 cm less than bore size of gantry)

-pts entire anatomy must be visible from al 360 degrees

-scan as close to center of bore as possible

-make sure not to cut off any anatomy



TX planning computer - ANSWERS-shape beam to anatomy

-depict exact dose of each organ

-manipulate isodose line to get optimal tx plan

-archives treatment data



Intro of what allowed drs to increase dose - ANSWERSCT



Understanding CT images - ANSWERS-knowledge of sectional anatomy is important

-can be viewed axial, coronal and sagittal

-axial plane is most common to view in RTT

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