Padlet #1 🩻 ~ Angelina Guadagna , Assil Khalil, Bentley Butler, Samuel Guerrier, & Shereece Dorsainvil by Samuel Guerrier https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw en-us 2024-01-11 14:41:26 UTC 2024-02-08 14:52:44 UTC hello@padlet.com https://padlet.net/icons/png/2620.png High attenuation would have more absorption/scatter, low attenuation would have barely any absorption/scatter. In CT, attenuation is measured in Hounsfield units for the different densities seen in the image. angelsflute https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845712575 2024-01-11 14:52:59 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845712575 Tissues like air and water have little attenuation and are displayed as low densities. Bone has high attenuation and is displayed as high density on CT. bentleybutler99 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845716670 2024-01-11 14:55:25 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845716670 Depending on the tissue density of what is being examined, this is what will affect what type of attenuation will take place. For example, tissues like air and water have low denities which will result in low attenuation. mkhl1998 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845719223 2024-01-11 14:57:04 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845719223 Attenuation depends on the energy of the photon & the density of the body part being imaged. It results when the energy of the photon is not strong enough to be transmitted through the body of the patient and gets absorbed into the atoms of their body. samuelguerrier12232 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845725170 2024-01-11 15:00:26 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845725170 attenuation is represented by gray scale appearance in the image and a numerical value that you can measure called Hounsfield unit (HU). the higher the number, the more x-rays the structure absorbs. so a high attenuation structure (eg. bone) will have a higher HU value than low attenuation structures (eg. fat or air) shereecedorsainvil https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845727011 2024-01-11 15:01:44 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845727011 EMI Research Laboratories bentleybutler99 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845729802 2024-01-11 15:03:43 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845729802 Hounsfield (1967) developed the first clinical CT on October 1, 1971 angelsflute https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845732654 2024-01-11 15:05:42 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845732654 EMI Research Laboratories accomplished this based on the patented inventions of Godfrey Hounsfield. samuelguerrier12232 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845737514 2024-01-11 15:08:51 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845737514 The main difference between the 1st and 2nd generation CT scanner is that the 1st gen only employs a single detector, while the 2nd gen has multiple detectors. angelsflute https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845747526 2024-01-11 15:15:17 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845747526 First generation scanners only use a single detector and second generation scanners use a row of up to 30 detectors. bentleybutler99 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845754972 2024-01-11 15:20:11 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845754972 2nd Generation CT Scanners are more technologically advanced than the 1st generation. Instead of one rudimentary detector, the 2nd generation scanner contains a row of 30 detectors to pick up the X-ray beam which leads to a more detailed image. samuelguerrier12232 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845756540 2024-01-11 15:21:16 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845756540 First gen takes up 5 minutes per slice, while second gen takes only 5-90 seconds per slice. mkhl1998 https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845767908 2024-01-11 15:29:02 UTC https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845767908 first generation ct scanner has a pencil like x-ray beam, and second generation ct scanner has a fan shaped x-ray beam shereecedorsainvil https://padlet.com/samuelguerrier12232/f2jcs9h0xqwf8ilw/wish/2845768014 first and second generation ct scanners have the same tube detector movement: translate-rotate

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