Mobius AIRO Mobile CT System - Page 253

MI-42-0001 Rev. 19 241
CT USER INFORMATION: Dosage Factors and Image Quality
Modulation
Transfer Function
Typical Results for
Standard Kernel
Figure 167
The deviations in the measured MTFs are within the range of +/- 10%.
Typical Values
Circular ROI Diameters Mean CT NUMBER HU Noise HU Uniformity HU
60mm @ ISO
0 +- 7 8 +- 40%
15mm @ ISO
0 +- 7 10 +- 40%
15mm @ 12 o’clock
0 +- 7 6 +- 40% < 5 HU
15mm @ 3 o’clock
0 +- 7 6 +- 40% < 5 HU
15mm @ 6 o’clock
0 +- 7 6 +- 40% < 5 HU
15mm @ 9 o’clock
0 +- 7 6 +- 40% < 5 HU
Phantom: The CT conditions of Operation Gammex 464 MTF Module.
kVp 120
mA 110
Scan Mode Helical
Pitch Scan Time 1.41
FOV 21.0 cm
Recon Image Pixels 512 x 512
Recon Kernel Standard
Tomographic Section Length 1.0 mm