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13 Cards in this Set
- Front
- Back
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NRC Regulations
He most likely will not ask these type of questions |
** See P.P
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The Required Dose Calibrator Quality Control Tests are:
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Daily Constancy
Linearity Accuracy Geometry |
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Accuracy
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The purpose of the accuracy test is to compare the DC activity reading to a known source standard source. The source used must be traceable to a NBSR. ACCURACY MUST BE WITHIN +/- 10%
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Linearity/Lab
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The purpose is to assure the DC gives accurate readings over the entire range of doses given clinically. The licensee must mathematically correct for any deviation in linearity which is greater then +/- 10%
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A record for dosage determination must be kept for
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3 years.
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Two methods for linearity
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1. Decay Method
2. Sleeve Method |
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Geometry- the licensee must keep a record for this test for the duration of the DC
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The purpose is to assure that the DC response does not differ with the change in shape,size or container types used in nuclear medicine. The licensee must mathematically correct for any deviation in geometry which is greater than +/- 10%.
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For the photon emitters used in NM,
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there is no significant geometry or volume effect.
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Mo-99 contamination is
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undesirable in our Tc-99m.
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*****A license may not administer to humans a radiopharmaceutical
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containing more than 0.15 microcuries of Mo-99m per millicuries of Tc-99m
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Daily Dose Calibrator
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Zero the DC
Check the Background Perform daily Constancy check, pretty much the same as accuracy |
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For most locations, this is performed using two sealed sources of different energies.
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Most locations use Co-57 & Cesium-137
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Cobalt 57 122keV is used because it has an energy level close to Tc-99m of 140 keV....and a reasonably long half-life of 272 days.
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Cesium 137 is used because of its 662 keV energy close to F-18 511keV. It has a very long half life of 30 years which makes it an ideal reference source,.
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