Term
| CPR What is the half life of Cobalt-60? |
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Definition
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Term
| CPR What is an Indian Club Source? |
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Definition
| Heavily loaded with activity on one end of a source. |
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Term
| MKM What are the advantages of HDR? |
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Definition
more convenient than LDR-usually outpatient
shorter treatment time- minutes vs.days
less expensive- no hospital stay |
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Term
MKM What kind of implants and treatment is Gold-198 most commonly used for?
What is the main advantage of using Gold-198? |
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Definition
permanent implants, prostate
short half life of 2.7 days |
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Term
CG What malignancy is commonly treated with an external applicator or mold and with what kind of material?
A. Vulva, Palladium-103
B. Uveal melanoma, Iodine-125
C. Breast, Gold-198 |
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Definition
B. Uveal melanoma, Iodine-125
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Term
| CG Define tandem and ovoids. What kind malignancies is commonly uses these instruments? |
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Definition
Tandem- long narrow tube inserted into the cervix
Oviods-inserted into lateral fornices of the vagina
GYN |
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Term
SS
What is a uniform source vs. non-uniform source? |
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Definition
Uniform source: has equal radioactivity throughout the active length.
Non-uniform source: unequal radioactivity distributed throughout the source. EX: indian club source & dumbbell source. |
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Term
SS
What is a common type of source for brachytherapy treatments of the prostate? |
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Definition
Permanent tube source: Radon-222 & Gold-198
*Packaged in seeds 3-5mm long
*They have short 1/2 lives |
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Term
| ST What are the advantages of using brachytherapy? |
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Definition
| Organ preservation and acceptable cosmetic results |
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Term
| ST Define the decay constant. |
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Definition
| Total number of atoms that decay per unit time. |
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Term
| AM - Where are intraluminal sources placed in the body and give two examples |
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Definition
| AM-They are placed within body tubes; i.e. the trachea and the rectum. |
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Term
| AM-What is the difference between low dose rate and high dose rate? |
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Definition
AM- LDR: conventional, typically an inpatient and treatment lasts several continuous subsequent days.
HDR: Typically outpatients and fractionation can vary between several days, every other day, or BID (inpatient) |
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