Term
| Defined are in which the occupational exposure of personnel to radiation is under the supervision of the radiation protection supervisor. |
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Definition
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Term
| Can be occupied by anyone. Dose limits must be reduced to less than 2mREM/week |
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Definition
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Term
| Useful beam, most intense, hazardous and most difficult to sheild against. |
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Definition
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Term
| composed of scatter and leakage radiation. Scattering object considered a new source of radiation. |
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Definition
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Term
| Protective barrier materials |
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Definition
lead
steel
concrete
earth |
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Term
| Any wall/floor to which the primary beam can be directed. requirements depends on the level of energy. must be over __ ft thick : |
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Definition
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Term
| Designed to shield against scatter or leakage radiation. |
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Definition
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Term
| control booth is an example of |
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Definition
| secondary barrier. must have leaded glass with 1.5mm Pb equiv. |
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Term
| Factors that affect barrier thickness |
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Definition
workload
occupancy factor
use factor
distance |
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Term
| number of patients that will be treated per week and how much radiation will be given to each one |
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Definition
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Term
| expressed in cGy per week at isocenter |
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Definition
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Term
The amount of time adjacent areas will be occupied
values range 0 to 1 |
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Definition
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Term
use of the primary beam
the amount of time during the use that the primary beam will be aimed at a wall
0 to 1 |
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Definition
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Term
distance from the source of radiation to the occupied area.
areas further from the radiation source receive less radiation and require less shielding |
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Definition
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Term
| amount of thickness of a material that will decrease the radiation intensity by 50% of its original value. |
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Definition
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Term
| what are the 3 cardinal principles of radiation protection |
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Definition
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Term
| Substances (usually protein) that can be found in the body ( BLOOD OR URINE ) , when cancer is present. |
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Definition
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Term
| They can be products of the cancer cells or of the body response to cancer cells. |
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Definition
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Term
Tests:
blood or urine samples are combined with antibodies designed to react to that specific |
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Definition
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Term
| T/F tumor markers by themselves are usually not enough to rule out or diagnose a specific cancer. |
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Definition
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Term
| most tumor cells are also produced by |
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Definition
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Term
| t/f = every person with cancer has elevated tumor markers. |
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Definition
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Term
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Definition
| prostate specific antigen - used for prostate cancer |
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Term
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Definition
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Term
| some newer tumor markers help show how aggressive a tumor is or how it will |
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Definition
| respond to a particular drug |
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Term
| What is the present most common use of tumor markers |
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Definition
| determining effectiveness of treatment |
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Term
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Definition
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Term
| for cancer of the placenta |
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Definition
| HCG human chorionic gonadrotrophan |
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Term
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Definition
| CEA carcinoembryonic antigen |
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Term
| for colorectal and pancreatic cancers |
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Definition
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Term
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Definition
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Term
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Definition
| Bladder tumor antigen BTA |
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Term
| BTA for bladder is used along with |
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Definition
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Term
| In breast, no tm has been found useful for screening t/f |
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Definition
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Term
| Colorectral: an elevated CEA may indicate a |
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Definition
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Term
| Liver: higher AFP occurs in |
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Definition
| 2/3 patients. screening with AFP is used in countries where liver cancer is common. |
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Term
| CA 125 is elevated with with |
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Definition
| epithelial ovarian cancer |
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Term
| attention is focused on ? to detect cancer. |
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Definition
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Term
| sealed source of ionizing radiation is placed within the patient |
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Definition
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Term
| 3 types of radioactive materials for brachytherapy are |
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Definition
| 1.Cesium 2.iridium 3.gold |
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Term
| form of application for brachytherapy: |
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Definition
| radioactive source placed within applicator |
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Term
| dose rate for brachytherapy... |
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Definition
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Term
| brachytherapy is used to treat.. (what) |
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Definition
Head and neck cancers,
gynecological cancers and
genitourinary cancers. |
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Term
| Radiation safety procedures for use of sealed radiation sources are prepared, implemented and supervised by |
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Definition
| clinical medical physicist |
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Term
| most temporary implants will be inserted into the patient in the |
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Definition
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Term
| before brachy therapy, notification of safety officer should be at least ? prior to source implantation |
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Definition
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Term
| what information must the safety officer be notified of..? |
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Definition
- date of insertion
- length of treatment
- radioactive material used
- radioactive material activity
- where patient will be located
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Term
| after insertion of radiation sources, the radiation oncology department must: |
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Definition
- post a warning sign on/by the door
- " " on the patients chart
- perform a radiation exposure survey
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Term
| final records taken after brachytherapy treatment |
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Definition
| 1. area surveys taken after the implant 2. patient surveys 3. room surveys taken after removal of the sources. 4. Final inventory of sources. these records will be kept separate from the patient's chart. |
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Term
| if a source becomes dislodged... |
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Definition
| use long forceps to put it in the shielded container provided. |
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Term
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Definition
| surveyed before they leave the room |
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Term
| four things about visitors to brachy pt.'s |
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Definition
1.visitors must be 18 years old or older,
2.sit or stand at least six feet from the patient
3.remain no longer than two hours per day (unless otherwise instructed).
4.No pregnant visitors shall be allowed to visit patients receiving brachytherapy treatment. |
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