ObjectiveThe aim of this study was to present optimized device-specific low-dose cone-beam
computed tomography (CBCT) protocols with sufficient image quality for pre-surgical
diagnostics and three-dimensional (3D) modelling of cleft defects.MethodsSix paediatric
skulls were acquired, and an artificial bony cleft was created. A high-resolution
CBCT scan acted as a reference standard (Accuitomo 170, Morita, Kyoto, Japan) for
comparing eight low-dose protocols of Newtom VGi-evo (QR Verona, Cefla, Verona, Italy),
which included Eco and Regular protocols with different field of views (FOVs). Delineation
of lamina dura, cementoenamel junction (CEJ), trabecular bone and bony bridge were
assessed. A 3D model of the defect was also evaluated.ResultThe dose area product
of low-dose protocols ranged from 31 to 254 mGy*cm2. Despite the dose difference of
up to eight times between applied protocols, trabecular bone and CEJ exhibited appropriate
image quality in all scans. However, Regular small FOV protocols (5 x 5 and 8 x 5
cm2), for both lamina dura and bony bridge, demonstrated a significant improvement
in image quality compared to Eco FOV counterparts. Based on 3D defect analysis, no
significant difference existed between low-dose protocols and the reference standard.ConclusionThe
findings highlight the possibility of achieving a considerable reduction (up to eight
times) in the radiation dose using low-dose CBCT protocols while maintaining sufficient
image quality for assessing anatomical structures and 3D modelling in cleft cases.
Optimization of device-specific low-dose CBCT protocols for orofacial cleft imaging.image
