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10.1120/jacmp.v4i3.2514 http://scihub22266oqcxt.onion/10.1120/jacmp.v4i3.2514 C5724447!5724447!12841788     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       J+Appl+Clin+Med+Phys 2003 ; 4 (3): 189-94 Nephropedia Template TP {{tp|p=12841788|t=2003. Neutron source strength measurements for Varian, Siemens, Elekta, and General Electric linear accelerators |pdf=|usr=}}{{12841788}} gab.com Text Neutron source strength measurements for Varian, Siemens, Elekta, and General Electric linear accelerators JO: J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=12841788 #FOAvip The shielding calculations for high energy (>?10?MV) linear accelerators must include the photoneutron production within the head of the accelerator. Procedures have been described to calculate the treatment room door shielding based on the neutron source strength (Q value) for a specific accelerator and energy combination. Unfortunately, there is currently little data in the literature stating the neutron source strengths for the most widely used linear accelerators. In this study, the neutron fluence for 36 linear accelerators, including models from Varian, Siemens, Elekta/Philips, and General Electric, was measured using gold?foil activation. Several of the models and energy combinations had multiple measurements. The neutron fluence measured in the patient plane was independent of the surface area of the room, suggesting that neutron fluence is more dependent on the direct neutron fluence from the head of the accelerator than from room scatter. Neutron source strength, Q, was determined from the measured neutron fluences. As expected, Q increased with increasing photon energy. The Q values ranged from 0.02 for a 10 MV beam to 1.44(×1012) neutrons per photon Gy for a 25 MV beam. The most comprehensive set of neutron source strength values, Q, for the current accelerators in clinical use are presented for use in calculating room shielding.PACS number(s): 87.53.?j, 87.52.?g Twit Text FOAVip Neutron source strength measurements for Varian, Siemens, Elekta, and General Electric linear accelerators ????J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=12841788 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=12841788 #FOAvip English Wikipedia <ref>{{Cite pmid|12841788}}</ref> Neutron source strength measurements for Varian, Siemens, Elekta, and General Electric linear accelerators #MMPMID12841788 Followill DS; Stovall MS; Kry SF; Ibbott GS J Appl Clin Med Phys 2003[Sum]; 4 (3): 189-94 PMID12841788show ga The shielding calculations for high energy (>?10?MV) linear accelerators must include the photoneutron production within the head of the accelerator. Procedures have been described to calculate the treatment room door shielding based on the neutron source strength (Q value) for a specific accelerator and energy combination. Unfortunately, there is currently little data in the literature stating the neutron source strengths for the most widely used linear accelerators. In this study, the neutron fluence for 36 linear accelerators, including models from Varian, Siemens, Elekta/Philips, and General Electric, was measured using gold?foil activation. Several of the models and energy combinations had multiple measurements. The neutron fluence measured in the patient plane was independent of the surface area of the room, suggesting that neutron fluence is more dependent on the direct neutron fluence from the head of the accelerator than from room scatter. Neutron source strength, Q, was determined from the measured neutron fluences. As expected, Q increased with increasing photon energy. The Q values ranged from 0.02 for a 10 MV beam to 1.44(×1012) neutrons per photon Gy for a 25 MV beam. The most comprehensive set of neutron source strength values, Q, for the current accelerators in clinical use are presented for use in calculating room shielding.PACS number(s): 87.53.?j, 87.52.?g äNeutron source strength measurements for Varian, Siemens, Elekta, and (epmc).pdf DeepDyve Pubget Overpricing