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Table 1 Exposure parameters of the CBCT and MSCT scanners and conventional X-ray devices

From: Effective radiation dose of a MSCT, two CBCT and one conventional radiography device in the ankle region

  Siemens NewTom 5G Planmed Shimadzu
  Somatom CBCT Planmed FH-21 HR
  Definition AS+ Hi Res Standard Standard Verity AP + LAT
  MSCT “12 × 8” “15 × 12” “18 × 16” CBCT Radiography
Potential (kV) 120 110 110 110 90 57
Tube current (mA)‡ 54 11 1,5 0,6 8 -
Exposure time (s) 1.0 5,4 3,6 3,6 6 -
Q (mAs) 54 59 5,3 2,3 48 16
Slice thickness (mm) 0.6 - - - - -
Pitch (mm) 0.5 - - - - -
Voxel H (mm) - 0.15 0.3 0.3 0.2 -
Voxel L (mm) - 0.15 0.3 0.3 0.2 -
Voxel W (mm) - 0.15 0.3 0.3 0.2 -
Scan angle 360° 360° 360° 360° 210° -
Frame number - 360 360 360 300 -
Scan FOV (mm)† 130 × 160 120 × 80 150 × 120 180 × 160 130 × 160 130 × 160
  1. †For MSCTs and CBCT: diameter × length, for conventional X-ray width × height.
  2. ‡For NewTom 5G CBCT: mA is automatically adjusted using the “SafeBeam™” acquisition option.