際際滷shows by User: athuliya / http://www.slideshare.net/images/logo.gif 際際滷shows by User: athuliya / Mon, 15 Jul 2019 09:01:38 GMT 際際滷Share feed for 際際滷shows by User: athuliya Computed tomograpy /athuliya/computed-tomograpy computedtomograpy-190715090138
computed tomography is an method of examining the body organs.it is originally known as computed axial tomography. PRINCIPLE-It uses ionizing radiation or x rays ,coupled with an electronic detector array to record a pattern of densities and to create an image. GANTRY-Donut shape.It contain the scanner, x ray tube as well as detectors that generate and detect x rays. Two type-Scintillation detectors and gas filled detector OPERATING CONSOLE-Used to input all the factors related to taking a scanner (KVp, mA, Scan time ,Slice thickness etc.) Two different console One is Used by CAT Scanner operators and other by physicians.different generation of CT ie, first,second,third and fourth. QA tests Alignment of gantry laser-To verify the gantry lasers are parallel and orthogonal with the imaging plane,To verify that the wall lasers are accurately spaced from the scan plane,To verify proper identification of scan plane with gantry laser,Tolerance limit +/- 2mm,Should be done monthly and after laser adjustment, Gantry tilt-To verify the accuracy of gantry tilt indicators To verify that the gantry accurately return to nominal position after tilting Tolerance limit +/- 1mm or +/-1 degree Should be done annually. Generator tests-To verify the proper operation of a x ray generator.Should be done after the replacement of generator components Radiation profile width-To verify the radiation profile width meets the specification of manufacture.To verify that the sensitivity profile width meets the manufacturer specification.This is optional if the CTDI (computed tomography dose index) accuracy has been verified.Tolerance limit is specified by the manufacture.Should be done annually CT number accuracy-Daily-CT number for water.Monthly-4 to 5 different materials.Annually-electron density phantom.Tolerance limit for water 0 +/- 5 HU. In plane spatial integrity-Daily- x or y direction,Monthly- both direction,Tolerance limit +/-1mm ]]>
computed tomography is an method of examining the body organs.it is originally known as computed axial tomography. PRINCIPLE-It uses ionizing radiation or x rays ,coupled with an electronic detector array to record a pattern of densities and to create an image. GANTRY-Donut shape.It contain the scanner, x ray tube as well as detectors that generate and detect x rays. Two type-Scintillation detectors and gas filled detector OPERATING CONSOLE-Used to input all the factors related to taking a scanner (KVp, mA, Scan time ,Slice thickness etc.) Two different console One is Used by CAT Scanner operators and other by physicians.different generation of CT ie, first,second,third and fourth. QA tests Alignment of gantry laser-To verify the gantry lasers are parallel and orthogonal with the imaging plane,To verify that the wall lasers are accurately spaced from the scan plane,To verify proper identification of scan plane with gantry laser,Tolerance limit +/- 2mm,Should be done monthly and after laser adjustment, Gantry tilt-To verify the accuracy of gantry tilt indicators To verify that the gantry accurately return to nominal position after tilting Tolerance limit +/- 1mm or +/-1 degree Should be done annually. Generator tests-To verify the proper operation of a x ray generator.Should be done after the replacement of generator components Radiation profile width-To verify the radiation profile width meets the specification of manufacture.To verify that the sensitivity profile width meets the manufacturer specification.This is optional if the CTDI (computed tomography dose index) accuracy has been verified.Tolerance limit is specified by the manufacture.Should be done annually CT number accuracy-Daily-CT number for water.Monthly-4 to 5 different materials.Annually-electron density phantom.Tolerance limit for water 0 +/- 5 HU. In plane spatial integrity-Daily- x or y direction,Monthly- both direction,Tolerance limit +/-1mm ]]> Mon, 15 Jul 2019 09:01:38 GMT /athuliya/computed-tomograpy athuliya@slideshare.net(athuliya) Computed tomograpy athuliya computed tomography is an method of examining the body organs.it is originally known as computed axial tomography. PRINCIPLE-It uses ionizing radiation or x rays ,coupled with an electronic detector array to record a pattern of densities and to create an image. GANTRY-Donut shape.It contain the scanner, x ray tube as well as detectors that generate and detect x rays. Two type-Scintillation detectors and gas filled detector OPERATING CONSOLE-Used to input all the factors related to taking a scanner (KVp, mA, Scan time ,Slice thickness etc.) Two different console One is Used by CAT Scanner operators and other by physicians.different generation of CT ie, first,second,third and fourth. QA tests Alignment of gantry laser-To verify the gantry lasers are parallel and orthogonal with the imaging plane,To verify that the wall lasers are accurately spaced from the scan plane,To verify proper identification of scan plane with gantry laser,Tolerance limit +/- 2mm,Should be done monthly and after laser adjustment, Gantry tilt-To verify the accuracy of gantry tilt indicators To verify that the gantry accurately return to nominal position after tilting Tolerance limit +/- 1mm or +/-1 degree Should be done annually. Generator tests-To verify the proper operation of a x ray generator.Should be done after the replacement of generator components Radiation profile width-To verify the radiation profile width meets the specification of manufacture.To verify that the sensitivity profile width meets the manufacturer specification.This is optional if the CTDI (computed tomography dose index) accuracy has been verified.Tolerance limit is specified by the manufacture.Should be done annually CT number accuracy-Daily-CT number for water.Monthly-4 to 5 different materials.Annually-electron density phantom.Tolerance limit for water 0 +/- 5 HU. In plane spatial integrity-Daily- x or y direction,Monthly- both direction,Tolerance limit +/-1mm <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/computedtomograpy-190715090138-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> computed tomography is an method of examining the body organs.it is originally known as computed axial tomography. PRINCIPLE-It uses ionizing radiation or x rays ,coupled with an electronic detector array to record a pattern of densities and to create an image. GANTRY-Donut shape.It contain the scanner, x ray tube as well as detectors that generate and detect x rays. Two type-Scintillation detectors and gas filled detector OPERATING CONSOLE-Used to input all the factors related to taking a scanner (KVp, mA, Scan time ,Slice thickness etc.) Two different console One is Used by CAT Scanner operators and other by physicians.different generation of CT ie, first,second,third and fourth. QA tests Alignment of gantry laser-To verify the gantry lasers are parallel and orthogonal with the imaging plane,To verify that the wall lasers are accurately spaced from the scan plane,To verify proper identification of scan plane with gantry laser,Tolerance limit +/- 2mm,Should be done monthly and after laser adjustment, Gantry tilt-To verify the accuracy of gantry tilt indicators To verify that the gantry accurately return to nominal position after tilting Tolerance limit +/- 1mm or +/-1 degree Should be done annually. Generator tests-To verify the proper operation of a x ray generator.Should be done after the replacement of generator components Radiation profile width-To verify the radiation profile width meets the specification of manufacture.To verify that the sensitivity profile width meets the manufacturer specification.This is optional if the CTDI (computed tomography dose index) accuracy has been verified.Tolerance limit is specified by the manufacture.Should be done annually CT number accuracy-Daily-CT number for water.Monthly-4 to 5 different materials.Annually-electron density phantom.Tolerance limit for water 0 +/- 5 HU. In plane spatial integrity-Daily- x or y direction,Monthly- both direction,Tolerance limit +/-1mm
Computed tomograpy from Athuliya K
]]> 182 2 https://cdn.slidesharecdn.com/ss_thumbnails/computedtomograpy-190715090138-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://public.slidesharecdn.com/v2/images/profile-picture.png