Rad 370 Exam 1 Latest Questions With Verified Solutions
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Course
Rad 370
Institution
Rad 370
Radiopaque Marker - ️️material with high atomic number, lead, copper or solder
wire, used on the surface of a patient or placed in a body cavity. Used to mark or outline
specific parts or points of a patient
Quality Assurance (QA) - ️️All planned or systemic actions needed to provide
co...
Rad 370 Exam 1
Radiopaque Marker - ✔️✔️material with high atomic number, lead, copper or solder
wire, used on the surface of a patient or placed in a body cavity. Used to mark or outline
specific parts or points of a patient
Quality Assurance (QA) - ✔️✔️All planned or systemic actions needed to provide
confidence that a service will satisfy requirements for quality
Quality Control - ✔️✔️Techniques and activities used to fulfill requirements of quality
(Tests to be performed)
Quality Indicators - ✔️✔️Measurable elements of quality (Ex: 2%, 2mm, 1 degree)
Quality Assessment - ✔️✔️Collection and review of Quality Assurance data
Homogenuity - ✔️✔️Must be within 5 Hounsfield units
Percent of all cancer patients that will receive radiation therapy - ✔️✔️60%
Percent of patients cured through radiation therapy - ✔️✔️50-60%
Fixed Isocenter Distance - ✔️✔️100 cm
Varian scale begins with x degree at the top - ✔️✔️180
IEC scale begins with x degree at the top - ✔️✔️0
Projects the number field on the patient to accurately measure SSD - ✔️✔️ODI (Optical
Distance Indicator)
Separation - ✔️✔️the thickness of a patient along the CA or at any point within the the
irradiated volume; helps calculate the amount of tissue in front of, behind, or around a
tumor
Quality - ✔️✔️Features and characteristics that bear on its ability to satisfy patient
needs
DRR - ✔️✔️2D image reconstructed from CT data that shows a beam's eye view
(BEV) of the treatment field
, Fudicial Plate - ✔️✔️measurement device with little lead pieces which represent 1 cm;
helpful when taking port films
Accessory Holder - ✔️✔️Holds blocks and the electron applicator
Port Film - ✔️✔️2D image taken at least once a week to help verify the treatment setup
Ideal DRR slice - ✔️✔️3x3 mm
Aperture size of a CT - ✔️✔️80-90 cm
Translation - ✔️✔️Patient moving into the CT aperture
2 Main functions of CT Sim - ✔️✔️1. Target Localization: locate exactly what needs to
be treated and mark the patient
2. Create DRRs
PET CT Fusion - ✔️✔️PET shows physiology, CT shows anatomy; detect hot areas
and better represent the disease
CT MRI Fusion - ✔️✔️Anatomy of soft tissue; useful for brain tumors
Treatment failure - ✔️✔️10% or greater reduction in dose can be the difference in cure
or relapse; missing the tumor once or twice in the treatment series
Patient Position Aids - ✔️✔️Help the patient feel comfortable and reduce motion but
does not ensure the patient will not move
Ex: head holder, sponges, sandbags, prone pillow, arm board
Simple Immobilization Devices - ✔️✔️Require the patient to hold still; supplemental aid
Ex: arm stretcher, bite block
Complex Immobilization Devices - ✔️✔️Restrict movement and ensure reproducibility;
unique to patient anatomy
Ex: Alpha Cradle, Vac Bag, Aquaplast Mask
Separation - ✔️✔️Measurement of patient thickness from the point of beam entry to the
point of beam exit
PET - ✔️✔️Best modality to image lymphnodes
Posterior/Dorsal Body Cavity - ✔️✔️Cranial and spinal cavity
Anterior/Ventral Body Cavity - ✔️✔️Thoracic cavity and abdominopelvic cavity
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