1 / 43

MULTISLICE CT

MULTISLICE CT. SINGLE vs MULTI. CT EVOLUTION. 1998 MULTISLICE CT SCANNERS INTRODUCED AT RSNA MEETING. SINGLE SLICE CT LIMITATIONS. SPEED PERFORMANCE 3D,MPR,MIP Z-AXIS RESOLUTION MPR LOW ACCURACY 360 LIA ( IMAGE QUALITY & ARTIFACTS) CT ANGIO LIMITATIONS MORE INTRAVENOUS CONTRAST.

gail-wiley
Download Presentation

MULTISLICE CT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. MULTISLICE CT

  2. SINGLE vs MULTI

  3. CT EVOLUTION

  4. 1998 MULTISLICE CT SCANNERS INTRODUCED AT RSNA MEETING

  5. SINGLE SLICE CT LIMITATIONS • SPEED PERFORMANCE • 3D,MPR,MIP Z-AXIS RESOLUTION • MPR LOW ACCURACY • 360 LIA ( IMAGE QUALITY & ARTIFACTS) • CT ANGIO LIMITATIONS • MORE INTRAVENOUS CONTRAST

  6. SLICE THICKNESS IN SINGLE SLICE CT DETERMINED BY: • PITCH • PRE-PATIENT COLLIMATION

  7. MULTISLICE CT COLLIMATION • BEAM FALLS ON THE ENTIRE MULTIROW DETECTOR ARRAY 8 MM WIDE BEAM FALLING ON FOUR DCETECTORS CAN PRODUCE: 4 –2MM SLICES

  8. SINGLE SLICE SPIRAL MULTISLICE FAN CONE BEAM GEOMETRY

  9. BEAM GEOMETRY • AS THE NUMBER OF DETECTORS IN A MULTIROW DETECTOR ARRAY INCREASES THE BEAM BECOMES WIDER TO COVER THE 2D DETECTOr ARRAY. LARGER # OF ROWS IN THE DETECTOR ARRAY WILL RESULT IN A WIDER BEAM IN Z-AXIS DIRECTION ( CONE BEAM)

  10. POST DETECTOR COLLIMATION IN MULTISLICE CT • THE COLLIMATORS ARE POSITIONED BETWEEN DETECTOR COLUMNS.

  11. IMAGE RECON IN MULTI SLICE CT • SPECIAL FAN BEAM RECON ALGORITHMS HAVE BEEN DEVELOPED

  12. INSTRUMENTATION

  13. DAS • ALMOST ALL MULTISLICE CT SCANNERS ARE BASED ON III GENERATION SYSTEM DESIGN ROTATE-ROTATE

  14. GENERATOR • HIGH FREQUENCY GENERATOR 60 KW OUTPUT.

  15. X-RAY TUBE • ROTATING ANODE TUBE WITH VERY HIGH HEAT CAPACITY

More Related