Nuclear Medicine Quality Control

An established set of ongoing measurements and analyses designed to ensure that the performance of a procedure or instrument is within a predefined acceptable range

To ensure that clinical studies are producing correct results

To evaluate their functionality for detection of radiation

<p>Verification of battery functionality, reading of background radiation level, and check on the constancy of the detector’s response to a radioactive source</p> Signup and view all the answers

<p>By the response to the constancy check</p> Signup and view all the answers

<p>That the detector has not become contaminated with radioactivity</p> Signup and view all the answers

<p>To compare the reading given by the detector to the reading expected from a source with a known amount of radioactivity.</p> Signup and view all the answers

<p>By multiplying its gamma constant by the reference source’s activity and dividing by the square of the distance between the source and the detector.</p> Signup and view all the answers

<p>A commercial calibration laboratory, health physics consulting firm, or nuclear medicine product vendor.</p> Signup and view all the answers

<p>Within ±10% of the expected value.</p> Signup and view all the answers

<p>Daily.</p> Signup and view all the answers

<p>To verify the proper operation of the dose calibrator on a given day.</p> Signup and view all the answers

<p>±10% (measured activity vs calibration data) or less.</p> Signup and view all the answers

<p>Three separate measurements.</p> Signup and view all the answers

<p>Within ±5% of the reference standard activity.</p> Signup and view all the answers

<p>To check the reading of the constancy source with each of the isotope selector buttons.</p> Signup and view all the answers

<p>For older electromechanical models.</p> Signup and view all the answers

<p>Several quality control measures.</p> Signup and view all the answers

<p>To measure the ability of the dose calibrator to accurately measure sources with activities spanning several orders of magnitude in a proportional manner.</p> Signup and view all the answers

<p>By measuring a short-lived source such as Tc-99m at several time points over 2 to 3 days, plotting the measured activity vs time on semilogarithmic graph paper, and ensuring consistent and accurate timing.</p> Signup and view all the answers

<p>Using a set of commercially available lead sleeves and a single high-activity source, where the source is put into each of the sleeves and the measured activity is compared to that expected based on the known amount of attenuation by the sleeve.</p> Signup and view all the answers

<p>Quarterly over a range of activities from the maximum activity dispensed down to 30 μCi (1.1 MBq).</p> Signup and view all the answers

<p>(observed ÷ predicted × 100%)</p> Signup and view all the answers

<p>It should be serviced.</p> Signup and view all the answers

<p>Saturation of capacitor and recombination.</p> Signup and view all the answers

<p>By geometry testing, which involves the measurement of a variety of radioactive sources in different geometric and volumetric configurations.</p> Signup and view all the answers

<p>Inaccuracies are subject to beta particles or low-energy gamma rays when the radionuclide is contained in a glass vial vs a plastic syringe.</p> Signup and view all the answers

<p>The voltage of the power supply should be noted during the constancy check.</p> Signup and view all the answers

<p>An error of 10 minutes can give an apparent 2% linearity error.</p> Signup and view all the answers

<p>Incremental additions of water to a radioactive solution, with a dose calibrator measurement after each addition using 3-ml syringes and 30-ml glass vials.</p> Signup and view all the answers

<p>To ensure that the clinical studies are producing correct results</p> Signup and view all the answers

<p>To check if the detector has become contaminated with radioactivity</p> Signup and view all the answers

<p>Verifying that the battery is working and measuring background radiation level</p> Signup and view all the answers

<p>By performing a constancy check</p> Signup and view all the answers

<p>That the detector has not become contaminated with radioactivity</p> Signup and view all the answers

<p>To ensure correct readings for activity measurements</p> Signup and view all the answers

<p>&quot;To check if the detector has become contaminated with radioactivity&quot;</p> Signup and view all the answers

<p>To verify their functionality for detection of radiation.</p> Signup and view all the answers

<p>Reading background radiation level and checking constancy of response to a radioactive source.</p> Signup and view all the answers

<p>Ensure that procedures and instruments are within an acceptable range.</p> Signup and view all the answers

<p>Because they must be evaluated on a regular basis despite their simplicity.</p> Signup and view all the answers

<p>To verify the proper operation of the dose calibrator on a given day</p> Signup and view all the answers

<p>Daily</p> Signup and view all the answers

<p>+/- 10%</p> Signup and view all the answers

<p>To maintain accurate readings and reliable instruments</p> Signup and view all the answers

<p>Ensuring that the distance between the source and the detector is correct</p> Signup and view all the answers

<p>Differences in response to different source containers</p> Signup and view all the answers

<p>Perform routine quality control tests</p> Signup and view all the answers

<p>By evaluating long-lived source activity daily</p> Signup and view all the answers

<p>By using an alternative power source</p> Signup and view all the answers

<p>Variations in background radiation levels</p> Signup and view all the answers

<p>Performing constancy and accuracy testing</p> Signup and view all the answers

<p>Stability and reliability of instruments</p> Signup and view all the answers

<p>To check for contamination and zero the calibrator</p> Signup and view all the answers

<p>To assess the ability of the calibrator to measure variable quantities in a linear fashion</p> Signup and view all the answers

<p>To minimize errors in assessing the linearity of the measured activity vs time</p> Signup and view all the answers

<p>Using a set of commercially available lead sleeves and a single high-activity source</p> Signup and view all the answers

<p>To correct values for known attenuation factors and obtain percent error</p> Signup and view all the answers

<p>It needs to be serviced</p> Signup and view all the answers

<p>Calculating (observed ÷ predicted × 100%)</p> Signup and view all the answers

<p>Using a set of commercially available lead sleeves and a single high-activity source.</p> Signup and view all the answers

<p>The need for servicing.</p> Signup and view all the answers

<p>Calculating (observed ÷ predicted × 100%).</p> Signup and view all the answers