Multi slice ct ppt
- 1. Prepared by, Anand and Shonima
- 4. MULTI-SLICE AQUISITION • 4 slice since 1999 (GE, Siemens, Philips, Toshiba) • 8 slice since 2001 (GE) • 16 slice since 2002 (GE, Siemens, Philips, Toshiba)
- 5. MAIN PARTS Generator • High voltage generator 60 kw out put X-ray tube • Rotating anode tube • Very high heat capacity Detector • Solid state detector
- 6. DIFFERENCE
- 7. LIMITATIONS OF SINGLE SLICE CT • Speed performance • MPR low accuracy • image quality and artifacts • More intravenous contrast
- 8. ADVANTAGES • Improved spatial resolution. • Motion artifacts reduced. • Patient breath hold is much less demanding. • Imaging larger z-axis volume in less time. • Less contrast medium required. • Improved accuracy in needle placement CT fluoroscopy.
- 9. ARTIFACTS IN MULTI-SLICE SCANNING • Motion artifact reduced by faster scanning. • Stair-step artifacts in 3D reconstruction reduced by using thinner slices. • Partial volume artifacts reduced by using thinner slices.
- 12. MANUFACTURERS
- 17. DETECTOR DESIGN
- 21. Major impact areas for multi-slice ct • The multi-slice technique has added new possibilities for faster, better and safer evaluation of many different disease
- 23. Stellar detector • The stellar detector provide ultra-thin slices. • very high spatial resolution • It significantly reduces electronic noise for uncompromised diagnostic outcome at a low dose.
- 26. cost