Term
| three modalities used in treatment of cancer |
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Definition
radiation therapy
cancer
chemotherapy |
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Term
| __ or __ are treated with cancericidal doses of ionizing radiation as prescribed by a radiation oncologist |
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Definition
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Term
| radiation therapy is used after surgery when a patient is deemed to be at high risk for ___ |
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Definition
| recurrence in surgical bed |
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Term
| most often delivered ____ for ___ weeks |
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Definition
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Term
| dosages range from ____ for palliation and ___ for curative treatment (total dose) |
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Definition
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Term
| delievery of small amount of radiation per day (180-200 cGy) for certain treatments |
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Definition
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Term
| fractionation helps to minimize: |
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Definition
| acute toxic effect of radiation |
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Term
|
Definition
-radiation oncologist
-medical physicist
-medical dosimetrist
-radiation therapist
-oncology nurse |
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Term
| responsibilities of a radiation therapist |
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Definition
obtaining radiographs or CT scans
administering treatments
keeping accurate records of doses
monitoring patient's well-being |
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Term
| in the early days of xray, biological effects of ionizing radiation included: |
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Definition
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Term
| Dr. Emile Grubbe irradiated a woman with a carcinoma on her left breast on ___ |
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Definition
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Term
in ___, Dr. Clarence Skinner performed the first curative treatment using ionizing radiation on a woman with malignant fibrosarcoma
in ___ the woman was delclared free of her cancer |
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Definition
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Term
| two major categories for application of radiation for cancer treatment |
|
Definition
external beam
bracytherapy |
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Term
also called teletherapy
patient lies underneath a machine that emits radiation |
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Definition
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|
Term
radioactive material is placed in the patient
three techniques |
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Definition
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|
Term
first technique of brachytherapy
radioactive source is plaed in close proximity to lesion |
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Definition
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|
Term
second type of brachytherapy
placemetn of radioactive source in a body cavity |
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Definition
| intracavitary implant technique |
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|
Term
third type of brachytherapy
radioactive source is placed directly into tumor site and adjacent tissue |
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Definition
| interstitial implant technique |
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Term
| for treatment of superficial lesions |
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Definition
| 120 kVp superficial xray unit |
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Term
| for treatment of moderately superficial lesions |
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Definition
| 250 kVp orthovoltage unit |
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Term
average energy is 1.25 MeV
known as the "work horse" because of its reliability and mechanical simplicity
first machine to rotate 360 around patient |
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Definition
| cobalt 60 gamma ray source |
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|
Term
average energy is 1.25 MeV
known as the "work horse" because of its reliability and mechanical simplicity
first machine to rotate 360 around patient |
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Definition
| cobalt 60 gamma ray source |
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Term
| machine rotates around fixed point and maintains same distance from radiation source |
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Definition
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|
Term
source for high energy beam
most suitable for tumors deep in body
developed in 1952
modern version has "dualing asymmetric jaws" for collimation |
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Definition
| 6-35 MV linear accelerator/betatron |
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Term
| steps in radiation therapy |
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Definition
1. simulation
2. dosimetry
3. treatment |
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Term
radiation therapist uses fluoro to determine field dimensions and depth of isocenter per oncologist
treatment planning
treatment field is outlined |
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Definition
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Term
| the measurement of radiation dose and its distribution throughout the patient's body |
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Definition
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Term
| ___ monitors the dosage that critical anatomy is receiving and keeps the dose within established guidelines |
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Definition
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Term
| ensuring optimum treatment requires |
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Definition
-precision positioning of machine
-proper selectrion of treatment field
-accurate placement of cerrobend blocks
-implementation of any changes in treatment plan |
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Term
| produce a digital iamge that is displayed on a computer screen adjacent to linac computer console |
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Definition
| Electronic Portal Imaging Devices (EPIDs) |
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Term
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Definition
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Term
5000-6000 cGy of 10 MeV applied AP, PA and oblique
therapy used in conjunction with surgery and chemo |
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Definition
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Term
| 4 fields are used- AP, PA, right and left lat using 10 MV and 7000 cGy |
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Definition
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Term
| small lesion can be treated with 6000 cGy for 4 weeks with orthovoltage beam |
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Definition
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|
Term
uses two tangential fields to chest wall or intact breast
MV radiation delivers 5000 cGy in 5 weeks |
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Definition
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|
Term
| an additional ____ for lumpectomy |
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Definition
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Term
| cancer of the ___ is best treated with megavoltage radiation |
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Definition
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|
Term
| tumors confined to the true vocal cords have a ___% __ year cure rate |
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Definition
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|
Term
| cure rates end to run between __ and __% and basal cell lesions less than __ in diameter have a cure rate of almost 100% |
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Definition
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|
Term
| a medulloblastoma tumor is radiosensitive and patients who have had traetment of the entire cerebrospinal axis have a ___ year cure rate of greater than __% |
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Definition
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