Table 2.
Bit depth and grey shades of acquired data, file size and number of voxels according to the unit
| Parameter | CBCT units |
|||||
|---|---|---|---|---|---|---|
| CRAN | SCAN | NEWT | PROM | ICAT | ACCU | |
| Nominal bit depth (bits) | 12.0 | 12.0 | 16 | 12.0 | 14.0 | 13.0 |
| Real bit depth (shades of grey) | 4096.0 | 4096.0 | 32,768 | 4096.0 | 16,384.0 | 8192.0 |
| Grey shades used | 4096.0 | 4096.0 | 17,271 | 4096.0 | 4329.0 | 3667.0 |
| DICOM file (MB) | 27.9 | 54.0 | 382 | 30.2 | 46.6 | 212.5 |
| Number of voxels (million) | 14.1 | 27.7 | 201 | 15.6 | 24.3 | 111.2 |
ACCU, 3D Accuitomo FPD80 (Morita, Kyoto, Japan); CBCT, cone beam CT; CRAN, Cranex® 3D (Soredex Oy, Tuusula, Finland); DICOM, digital imaging and communications in medicine; ICAT, i-CAT (Imaging Sciences International, Hatfield, PA); NEWT, NewTom™ 5G (QR Srl, Verona, Italy); PROM, Promax® Dimax 3 Digital (Planmeca Oy, Helsinki, Finland); SCAN, Scanora® 3D (Soredex Oy).