en Radiation Biology Radiation Biology تحقيق بديع Original Research <div style="text-align: justify;"><span style="font-size:10pt"><span style="text-justify:newspaper"><span style="text-kashida-space:50%"><span style="line-height:119%"><span style="font-family:Calibri"><span style="color:black"><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Background</span></span></span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-weight:bold"><span style="language:en-US">:</span></span></span></span></span> <span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-US">The purpose of this study was to measure the surface dose in breast cancer patients undergoing supraclavicular irradiation using a thermoluminescent dosimeter (TLD) and compare the measurements to calculated doses determined by the treatment planning system (TPS). The results of in vivo patients&rsquo; measurements were verified using a phantom. </span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Materials and Methods</span></span></span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-weight:bold"><span style="language:en-US">:</span></span></span></span></span> <span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-US">The oesophageal surface dose of 30 breast cancer patients undergoing supraclavicular lymph node irradiation was measured by TLD and TPS. For each patient, two TLDs were positioned on the oesophageal surface. The TLD and TPS results were verified using a phantom that covered from the oesophagus to the supraclavicular area. The TLD was positioned within or outside the treatment field on the phantom depending on the patient. </span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Results</span></span></span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-weight:bold"><span style="language:en-US">:</span></span></span></span></span> <span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-US">The average oesophagus surface dose was 9.04 &plusmn; 5.07 Gy and 8.06 &plusmn; 6.17 Gy for TLD and TPS, respectively (p=0.09). Oesophagus surface doses were greater for the left than for the right side. The calculated and measured dose values at the surface for the phantom were 0.78 Gy and 0.96 Gy, respectively, with the TLD placed inside the radiation field (p=0.02). The calculated and measured dose values at the surface for the phantom were 0.024 Gy and 0.10 Gy, respectively, with the TLD placed outside the radiation field (p=0.01). </span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-style:italic"><span style="font-weight:bold"><span style="language:en-US">Conclusion</span></span></span></span></span></span><span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:#1f497d"><span style="font-weight:bold"><span style="language:en-US">:</span></span></span></span></span> <span lang="en-US" style="font-size:9.0pt"><span style="font-family:Calibri"><span style="color:black"><span style="language:en-US">The results showed a good agreement between TLD measurements and TPS calculations, except when the TLD was placed outside the radiation field. Therefore, dose calculations in peripheral regions should be used with caution.</span></span></span></span></span></span></span></span></span></span></div> Oesophagus, TLD dose, breast cancer, oesophageal dose, TPS dose. 647 652 http://ijrr.com/browse.php?a_code=A-10-1-1094&slc_lang=en&sid=1 S.S. Mohammed Amin Soma.amin@spu.edu.iq 7900319475328460024853 7900319475328460024853 Yes Department of Anesthesia, College of Health & Medical Technology in Sulaimani, Sulaimani Polytechnic University, Sulaimaniyah, Iraq K.A. Faraj 7900319475328460024854 7900319475328460024854 No Department of Physics, College of Science, University of Sulaimani, Sulaimaniyah, Iraq