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
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.
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
22.
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.
