Cone beam CT radiation dose in dental implant surgery

• Published in: Physica medica Vol. 32; p. 280
• Main Authors: Stefanopoulou, N, Fotos, N, Tsapaki, V, Kouratiadis, G, Krompas, N
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2016
• Subjects: Radiology
• ISSN: 1120-1797; 1724-191X
• DOI: 10.1016/j.ejmp.2016.07.625

Introduction New applications of CT are still shown, the most prominent example of which is the development of Cone Beam Computed Tomography (CBCT) for dental and maxillofacial imaging. The majority of studies related to CBCT dental radiation dose are based on anthropomorphic phantoms. Patient clinical studies on radiation dose are still scarce. Purpose The purpose of this study was to measure patient radiation exposure in terms of Kerma Area Product (KAP) and effective dose (Ef) in implant dentistry. Materials and methods The X-ray system used was a CS 9300 Carestream system. Patient sample included 177 individuals undergoing one or more CBCT examinations. Data recorded included: KAP, tube voltage (kV), tube current (mA), exposure time (s), field of view (FOV), patient age (A) and clinical indication. Results Patient sample mean age was 56 years. Women were 52.5% and men 47.5%. Patients had either 1 (80.2%), 2 (14.7%), 3 (2.35%) or >3 (2.3%) CBCT exams. Protocol details were: 80–90 kV, 4–5 mA, 8 s and a fixed FOV of 10 × 10 cm2 . Mean ± sd KAP was 523 ± 119 mGycm2 . A conversion factor of 0.08 mSv/Gycm2 was used to calculate Ef. Mean ± sd Ef was 42.4 ± 9.6 μSv. A coarse comparison was done with international data from phantom studies. This showed that our results were at the low part of the dose range reported in the international literature Conclusion The radiation dose values presented provide a baseline for future reference. More clinical studies are needed in order to derive more robust results on radiation dose levels in dental CBCT. Disclosure Authors should disclose any relationship that may bias their presentation. Please enter disclosure information here.