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Dear colleagues, Most guidance (AAPM TG-181, IAEA, IEC, EANM, and manufacturer manuals) specifies a minimum of annual linearity testing, plus acceptance and post-repair/relocation. However, ACR accreditation documents recommend quarterly testing,</div>
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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;"><span style="font-size: 13.3333px;">Dear colleagues, </span>
<div><span style="font-size: 13.3333px;"><br>
</span></div>
<div><span style="font-size: 13.3333px;">Most guidance (AAPM TG-181, IAEA, IEC, EANM, and manufacturer manuals) specifies a minimum of annual linearity testing, plus acceptance and post-repair/relocation. However, ACR accreditation documents recommend quarterly
testing, and most textbooks for technologists and physicists still present quarterly as the routine standard. </span></div>
<div><span style="font-size: 13.3333px;"><br>
</span></div>
<div><span style="font-size: 13.3333px;">In practice, this raises the question: should we consider quarterly testing as best practice, given the central role of the dose calibrator, or is annual testing sufficient? </span></div>
<div><span style="font-size: 13.3333px;"><br>
</span></div>
<div><span style="font-size: 13.3333px;">I would be very interested to hear how your departments are currently handling this. </span></div>
<div><span style="font-size: 13.3333px;"><br>
</span></div>
<div><span style="font-size: 13.3333px;">Many thanks, </span></div>
<div><span style="font-size: 13.3333px;">Sajjad</span><br>
<div><br>
</div>
<div>
<p class="MsoNormal" style="margin: 0in; font-size: medium; font-family: Aptos, sans-serif;">
<b><span style="font-size: 11pt;">Sajjad Aftabi, B.A., B.Sc. (Hon), M.Sc. (CAMPEP), CRPA (R), DABSNM</span></b><b><span style="font-size: 11pt;"></span></b></p>
<p class="MsoNormal" style="margin: 0in; font-size: medium; font-family: Aptos, sans-serif;">
<i><span style="font-size: 10pt;">Provincial Nuclear Medicine Physicist, </span></i><span style="font-size: 10pt;">Medical Physics Department, CancerCare Manitoba</span></p>
<p class="MsoNormal" style="margin: 0in; font-size: medium; font-family: Aptos, sans-serif;">
<i><span style="font-size: 10pt;">Clinical Adjunct Professor,</span></i><span style="font-size: 10pt;"> Department of Physics and Astronomy, University of Manitoba</span></p>
<p class="MsoNormal" style="margin: 0in; font-size: medium; font-family: Aptos, sans-serif;">
<span style="font-size: 10pt;">675 McDermot Ave, Winnipeg MB, R3E 0V9</span></p>
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<span style="font-size: 10pt;">Phone: (204) 787-2167</span></p>
<p class="MsoNormal" style="margin: 0in; font-size: medium; font-family: Aptos, sans-serif;">
<span style="font-size: 10pt;">Email: <a href="mailto:saftabi@cancercare.mb.ca" target="_blank" rel="noopener noreferrer" style="color: blue;"><span style="color: rgb(5, 99, 193);">saftabi@cancercare.mb.ca</span></a></span></p>
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<span style="font-size: 10pt; font-family: Helvetica, sans-serif; color: rgb(51, 51, 51);"> </span><span style="font-size: 10pt; color: rgb(51, 51, 51);"> <a href="mailto:sajjad.aftabi@umanitoba.ca" target="_blank" rel="noopener noreferrer" style="color: blue;"><span style="color: rgb(5, 99, 193);">sajjad.aftabi@umanitoba.ca</span></a></span></p>
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