Comparison of CTDIvol and DLP values between cadaveric cases and clinical scans*
| CT Protocol | MDCT | CARE Dose | Cadaveric Cases | Clinical Cases | ||
|---|---|---|---|---|---|---|
| CTDIvol (mGy) (mean ± SD) | DLP (mGy.cm) (mean ± SD) | CTDIvol (mGy) (mean ± SD) | DLP (mGy.cm) (mean ± SD) | |||
| Brain (tilted axial mode) | 16 | + | 63.36 ± 2.18 | 930.50 ± 61.08 | 59.56 ± 2.25 | 857.00 ± 24.49 |
| Brain (helical mode) | 64 | + | 36.77 ± 1.76 | 601.33 ± 47.48 | 39.43 ± 1.30 | 711.67 ± 35.43 |
| Paranasal sinus navigation | 16 | + | 40.57 ± 0.66 | 563.67 ± 28.24 | 40.19 ± 1.01 | 587.17 ± 60.49 |
| 64 | + | 20.69 ± 0.77 | 301.83 ± 7.11 | 23.37 ± 1.19 | 334.33 ± 28.79 | |
| Temporal bone/orbits | 16 | + | 102.86 ± 7.08 | 483.33 ± 48.84 | 104.45 ± 6.78 | 648.17 ± 132.09 |
| 64 | + | 46.71 ± 2.07 | 298.50 ± 20.97 | 58.34 ± 7.08 | 487.00 ± 84.38 | |
* Clinical scanning is routinely performed with ATCM. The CTDIvol and DLP values for clinical brain scans acquired in the helical mode on the 16-section MDCT are not available for comparison. This is because the protocol is only used in the rare clinical situation when the tilted axial mode cannot be executed (eg, patients in a cervical collar).