Bitewing radiography dosimetry of a stationary intraoral tomosynthesis imaging system

This study assessed effective doses (E) from conventional and stationary intraoral tomosynthesis (s-IOT) radiography for posterior bitewing (PBW) examinations and evaluated the effect of sensor attenuation. An adult human tissue–equivalent phantom and optically stimulated luminescent dosimeters were...

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Bibliographic Details
Published in:Oral surgery, oral medicine, oral pathology and oral radiology oral medicine, oral pathology and oral radiology, 2020-12, Vol.130 (6), p.717-724
Main Authors: Johnson, K. Brandon, LaPrade, J. Colin, Platin, Enrique, Broome, Angela M., Ludlow, John B., Mol, André
Format: Article
Language:English
Subjects:
Dentistry
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Summary:This study assessed effective doses (E) from conventional and stationary intraoral tomosynthesis (s-IOT) radiography for posterior bitewing (PBW) examinations and evaluated the effect of sensor attenuation. An adult human tissue–equivalent phantom and optically stimulated luminescent dosimeters were used. Series of 4 PBW radiographs were acquired with circular and rectangular collimation. s-IOT PBW radiographs were acquired with built-in rectangular collimation. Radiographs were acquired without and with a sensor in the beam path. E (in µSv) was 15.7 and 8.2 for conventional–circular, 4.6 and 1.1 for conventional–rectangular, and 11.9 and 5.9 for s-IOT in sensor-absent and sensor-present scenarios, respectively. For sensor-absent exposures, E for conventional–rectangular was 29.3% and E for s-IOT was 75.8% of the conventional–circular dose. With the sensor present, these values were 13.4% and 72.0%, respectively (P < .001). Sensor-present E was lower than sensor-absent E for all modalities (P < .001). Reductions in equivalent doses were similar to effective dose reductions. For PBW examinations, E for s-IOT was smaller than for conventional radiography with circular collimation, but larger than for conventional radiography with rectangular collimation. The presence of a sensor maintained these differences but reduced E for all modalities.
ISSN:2212-4403
2212-4411
DOI:10.1016/j.oooo.2020.06.004