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10.1120/jacmp.v11i2.3183 http://scihub22266oqcxt.onion/10.1120/jacmp.v11i2.3183 C5719945/?report=reader!5719945!20592702     free     free     free Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       J+Appl+Clin+Med+Phys 2010 ; 11 (2): 181-97 Nephropedia Template TP {{tp|p=20592702|t=2010. An organ and effective dose study of XVI and OBI cone?beam CT systems |pdf=|usr=}}{{20592702}} gab.com Text An organ and effective dose study of XVI and OBI cone beam CT systems JO: J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=20592702 #FOAvip The main purpose of this work was to quantify patient organ doses from the two kilovoltage cone beam computed tomography (CBCT) systems currently available on medical linear accelerators, namely the X?ray Volumetric Imager (XVI, Elekta Oncology Systems) and the On?Board Imager (OBI, Varian Medical Systems). Organ dose measurements were performed using a fiber?optic coupled (FOC) dosimetry system along with an adult male anthropomorphic phantom for three different clinically relevant scan sites: head, chest, and pelvis. The FOC dosimeter was previously characterized at diagnostic energies by Hyer et al. [Med Phys 2009;36(5):1711?16] and a total uncertainty of approximately 4% was found for in?phantom dose measurements. All scans were performed using current manufacturer?installed clinical protocols and appropriate bow?tie filters. A comparison of image quality between these manufacturer?installed protocols was also performed using a Catphan 440 image quality phantom. Results indicated that for the XVI, the dose to the lens of the eye (1.07 mGy) was highest in a head scan, thyroid dose (19.24 mGy) was highest in a chest scan, and gonad dose (29 mGy) was highest in a pelvis scan. For the OBI, brain dose (3.01 mGy) was highest in a head scan, breast dose (5.34 mGy) was highest in a chest scan, and gonad dose (34.61 mGy) was highest in a pelvis scan. Image quality measurements demonstrated that the OBI provided superior image quality for all protocols, with both better spatial resolution and low?contrast detectability. The measured organ doses were also used to calculate a reference male effective dose to allow further comparison of the two machines and imaging protocols. The head, chest, and pelvis scans yielded effective doses of 0.04, 7.15, and 3.73 mSv for the XVI, and 0.12, 1.82, and 4.34 mSv for the OBI, respectively.PACS number: 87.57.uq Twit Text FOAVip An organ and effective dose study of XVI and OBI cone beam CT systems ????J Appl Clin Med Phys http://www.kidney.de/pget.php?&tw=1&pmid=20592702 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=20592702 #FOAvip English Wikipedia <ref>{{Cite pmid|20592702}}</ref> An organ and effective dose study of XVI and OBI cone?beam CT systems #MMPMID20592702 Hyer DE; Serago CF; Kim S; Li JG; Hintenlang DE J Appl Clin Med Phys 2010[Spr]; 11 (2): 181-97 PMID20592702show ga The main purpose of this work was to quantify patient organ doses from the two kilovoltage cone beam computed tomography (CBCT) systems currently available on medical linear accelerators, namely the X?ray Volumetric Imager (XVI, Elekta Oncology Systems) and the On?Board Imager (OBI, Varian Medical Systems). Organ dose measurements were performed using a fiber?optic coupled (FOC) dosimetry system along with an adult male anthropomorphic phantom for three different clinically relevant scan sites: head, chest, and pelvis. The FOC dosimeter was previously characterized at diagnostic energies by Hyer et al. [Med Phys 2009;36(5):1711?16] and a total uncertainty of approximately 4% was found for in?phantom dose measurements. All scans were performed using current manufacturer?installed clinical protocols and appropriate bow?tie filters. A comparison of image quality between these manufacturer?installed protocols was also performed using a Catphan 440 image quality phantom. Results indicated that for the XVI, the dose to the lens of the eye (1.07 mGy) was highest in a head scan, thyroid dose (19.24 mGy) was highest in a chest scan, and gonad dose (29 mGy) was highest in a pelvis scan. For the OBI, brain dose (3.01 mGy) was highest in a head scan, breast dose (5.34 mGy) was highest in a chest scan, and gonad dose (34.61 mGy) was highest in a pelvis scan. Image quality measurements demonstrated that the OBI provided superior image quality for all protocols, with both better spatial resolution and low?contrast detectability. The measured organ doses were also used to calculate a reference male effective dose to allow further comparison of the two machines and imaging protocols. The head, chest, and pelvis scans yielded effective doses of 0.04, 7.15, and 3.73 mSv for the XVI, and 0.12, 1.82, and 4.34 mSv for the OBI, respectively.PACS number: 87.57.uq äAn organ and effective dose study of XVI and OBI cone?beam CT systems (epmc).pdf DeepDyve Pubget Overpricing