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SUMMARY:Basics Of Clinical X-Ray Computed Tomography
DTSTART;VALUE=DATE-TIME:20060210T110000Z
DTEND;VALUE=DATE-TIME:20060210T120000Z
DTSTAMP;VALUE=DATE-TIME:20260611T102458Z
UID:indico-event-800@indico.ific.uv.es
DESCRIPTION:CT imaging evolves faster than ever. After the advent of spira
 l CT in the early nineties multislice\nCT scanners were introduced in 1998
 . Today 64-slice scanners allow to cover a complete\nanatomical region wit
 h in a few seconds with isotropic spatial resolution of below 0.5 mm. The\
 ntechnology behind these devices is rather complex. CT detectors\, based o
 n ceramic scintillators\,\nmust be able to read out large amounts of data 
 within short times\; up to 600 MB/s data transfer\nrates are achieved. X-r
 ay tubes must have the capability to withstand centrifugal forces of more\
 nthan 20 g since rotation times are in the order of 0.3 s.\nAn even more i
 mportant key technology is image reconstruction. It is rather easy to perf
 orm reconstruction\nfor single or four-slice scanners but it becomes arbit
 rarily difficult for cone-beam\nscanners since one runs into the so-called
  cone-beam problem. Today\, clinical cone-beam scanners\nare either equipp
 ed with Feldkamp-type or with advanced single-slice rebinning (ASSR)-\ntyp
 e algorithms. They must be capable of handling redundant data (arbitrary s
 piral pitch) to ensure\nfull dose utilization. Further these algorithms mu
 st be able to perform phase-correlated image\nreconstruction for imaging t
 he heart.\nThe increase in spatial resolution leads to a potential increas
 e in patient dose. Important measures\nto compensate that effect are dose 
 modulation techniques\, automatic exposure control and adaptive\nfiltering
  algorithms.\nThis lecture gives an overview of CT technology\, CT image r
 econstruction algorithms and the\ninterdependence of CT image quality and 
 dose. Important parameters are introduced and underlying\nrelations are di
 scussed.\n\nhttps://indico.ific.uv.es/event/800/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/800/
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