Reduction of scatter-induced image noise in cone beam computed tomography: effect of field of view size and position

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
R PauwelsSoontra Panmekiate

Abstract

To measure the effect of field of view (FOV) size and position on scatter-induced image noise in cone beam computed tomography (CBCT). A polymethyl methacrylate (PMMA) phantom containing air and aluminum underwent CBCT scanning, using seven FOVs ranging between 4 × 4 cm and 14 × 10 cm, positioned both centrally and according to a dental scan. Signal difference to noise ratio (SDNR) was measured on two-dimensional (2-D) projection images. At a central position, SDNR decreased with increasing FOV size, ranging between 9.8 (14 × 10 cm) and 10.9 (4 × 4 cm). For dental FOV positions, SDNR values were between 6.3 (14 × 10 cm) and 9.5 (4 × 4 cm). To reach a constant SDNR, a dose reduction up to 76% was possible for small FOVs compared with the 14 × 10 cm FOV. The use of small FOVs and peripheral FOV positioning decreases scatter at the detector, resulting in a considerable potential for reduction of radiation dose to the patient.

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Citations

Dec 3, 2016·Dento Maxillo Facial Radiology·Polyane M QueirozDeborah Q Freitas
Jan 4, 2017·Dento Maxillo Facial Radiology·Marcus V L de OliveiraRubens Spin-Neto
Apr 23, 2017·Clinical Oral Implants Research·Marina CodariReinhilde Jacobs
Mar 28, 2018·Dento Maxillo Facial Radiology·Amanda P CandemilMatheus L Oliveira
Dec 20, 2018·Dento Maxillo Facial Radiology·Eliana Dantas da CostaDeborah Queiroz Freitas
Dec 13, 2018·Dento Maxillo Facial Radiology·Amanda Pelegrin CandemilMatheus Lima Oliveira
Jan 4, 2019·Dento Maxillo Facial Radiology·Danieli Moura BrasilReinhilde Jacobs
Aug 31, 2019·Dento Maxillo Facial Radiology·Gustavo Machado SantaellaRubens Spin-Neto
Sep 5, 2019·Dentistry Journal·Ahmad Abdelkarim
Jun 6, 2020·Dento Maxillo Facial Radiology·Hugo Gaêta-AraujoReinhilde Jacobs
May 23, 2020·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Karla de Faria VasconcelosFrancisco Haiter-Neto
Apr 22, 2021·Dento Maxillo Facial Radiology·Ruben PauwelsSoontra Panmekiate
Jul 30, 2020·The Journal of Prosthetic Dentistry·Sergio Lins de-Azevedo-VazRogério Albuquerque Azeredo
Jul 22, 2021·Dento Maxillo Facial Radiology·Husniye Demirturk KocasaracDeborah Queiroz Freitas
Feb 15, 2020·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Amanda P CandemilMatheus Lima Oliveira

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