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10.1120/jacmp.v12i4.3554 http://scihub22266oqcxt.onion/10.1120/jacmp.v12i4.3554 C5718753!5718753!22089010     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 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 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 2011 ; 12 (4): 15-23 Nephropedia Template TP {{tp|p=22089010|t=2011. Increased beam attenuation and surface dose by different couch inserts of treatment tables used in megavoltage radiotherapy |pdf=|usr=}}{{22089010}} gab.com Text Increased beam attenuation and surface dose by different couch inserts of treatment tables used in megavoltage radiotherapy JO: J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=22089010 #FOAvip The use of solid carbon fiber table materials in radiotherapy has become more common with the implementation of image?guided radiotherapy (IGRT), since the solid materials give less imaging artifacts than the so?called tennis racket couchtops. The downside of the solid carbon fiber couch inserts is that they increase the beam attenuation, resulting in increased surface doses and inaccuracies in determine the dose in the patient. The purpose of this study was to evaluate the interaction of 6 and 15 MV photons with eight different couch inserts. The presented results enable direct comparison of the attenuation properties of the studied couchtops. With a direct posterior beam the maximum attenuations reach 3.6% and 2.4% with 6 and 15 M V, respectively. The measured maximum attenuation by a couchtop with an oblique gantry angle was 10.8% and 7.4% at 6 and 15 MV energies, respectively. The skin?sparing effect was decreased substantially with every couchtop. The highest increases in surface doses were recorded to be four? and threefold, as compared to the direct posterior open field surface doses of 6 and 15 MV, respectively. In conclusion, the carbon fiber tabletops decrease the skin?sparing effect of megavoltage photon energies. The increased beam attenuation and skin doses should be taken into account in the process of treatment planning.PACS number: 07.90.+c Twit Text FOAVip Increased beam attenuation and surface dose by different couch inserts of treatment tables used in megavoltage radiotherapy ????J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=22089010 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=22089010 #FOAvip English Wikipedia <ref>{{Cite pmid|22089010}}</ref> Increased beam attenuation and surface dose by different couch inserts of treatment tables used in megavoltage radiotherapy #MMPMID22089010 Seppälä JK; Kulmala JA J Appl Clin Med Phys 2011[Fal]; 12 (4): 15-23 PMID22089010show ga The use of solid carbon fiber table materials in radiotherapy has become more common with the implementation of image?guided radiotherapy (IGRT), since the solid materials give less imaging artifacts than the so?called tennis racket couchtops. The downside of the solid carbon fiber couch inserts is that they increase the beam attenuation, resulting in increased surface doses and inaccuracies in determine the dose in the patient. The purpose of this study was to evaluate the interaction of 6 and 15 MV photons with eight different couch inserts. The presented results enable direct comparison of the attenuation properties of the studied couchtops. With a direct posterior beam the maximum attenuations reach 3.6% and 2.4% with 6 and 15 M V, respectively. The measured maximum attenuation by a couchtop with an oblique gantry angle was 10.8% and 7.4% at 6 and 15 MV energies, respectively. The skin?sparing effect was decreased substantially with every couchtop. The highest increases in surface doses were recorded to be four? and threefold, as compared to the direct posterior open field surface doses of 6 and 15 MV, respectively. In conclusion, the carbon fiber tabletops decrease the skin?sparing effect of megavoltage photon energies. The increased beam attenuation and skin doses should be taken into account in the process of treatment planning.PACS number: 07.90.+c äIncreased beam attenuation and surface dose by different couch inserts(epmc).pdf DeepDyve Pubget Overpricing