Head and neck, CT, Radiation safety, Dosimetric comparison
P. P. RAGUCCI1, C. VALTOLINA2, D. D'Angelo1, I. Divenuto1, L. Balzarini2; 1ROZZANO, LO/IT, 2Rozzano/IT
All scans were considered to be of adeguate diagnostic image quality. Median score of ethmoid cribrose laminae and ostium-meatali complexes was 4.6.
Regarding radiation exposure,
in both protocols we evaluated Size and Size-Specific Dose Estimates SSDE, Computer Tomography Dose Index CTDIvol and Dose Lenght Product DLP.
Results are shown in table 1.
DLP decreases from 171.6 to 77.3 mGy*cm; SSDE decreases from 12.1 to 6.7 mGy while CTDI decreases from 10.9 to 6 mGy.
These results were obtained by changing only kV values.
Radiation exposure was significant smaller in the ultra-low-dose protocol group,
decreasing radiation dose approximately to 50% with respect to the standard low-dose protocol.