532-533 / 3581
Fan beam CT vs. Cone beam CT
(same radiation quality)
Advantages of FBCT:
• Efficient, ‘optimized’ detectors
Ionisation chambers, ultra-fast ceramics
Detectors are shielded against scattered radiation
• Reduced scatter (imaging a smaller volume per rotation)
• Faster gantry rotation
FBCT Image quality > CBCT Image quality