SU-E-I-58: Evaluation of Radiation Dose and Image Quality for TheVarian Cone Beam Computed Tomography System

2011 ◽  
Vol 38 (6Part4) ◽  
pp. 3409-3409
Author(s):  
H Cheng ◽  
V Wu ◽  
E Liu ◽  
D Kwong
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Tomography System

scholarly journals Cone-Beam Computed Tomography and Radiographs in Dentistry: Aspects Related to Radiation Dose

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Diego Coelho Lorenzoni ◽  
Ana Maria Bolognese ◽  
Daniela Gamba Garib ◽  
Fabio Ribeiro Guedes ◽  
Eduardo Franzotti Sant’Anna
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Cone Beam Computed Tomography ◽  
Field Of View ◽  
Cone Beam ◽  
Special Focus ◽  
Radiation Doses ◽  
Lower Effective Dose ◽  
Plain Radiographs

Introduction. The aim of this study was to discuss the radiation doses associated with plain radiographs, cone-beam computed tomography (CBCT), and conventional computed tomography (CT) in dentistry, with a special focus on orthodontics.Methods. A systematic search for articles was realized by MEDLINE from 1997–March 2011.Results. Twenty-seven articles met the established criteria. The data of these papers were grouped in a table and discussed.Conclusions. Increases in kV, mA, exposure time, and field of view (FOV) increase the radiation dose. The dose for CT is greater than other modalities. When the full-mouth series (FMX) is performed with round collimation, the orthodontic radiographs transmit higher dose than most of the large FOV CBCT, but it can be reduced if used rectangular collimation, showing lower effective dose than large FOV CBCT. Despite the image quality, the CBCT does not replace the FMX. In addition to the radiation dose, image quality and diagnostic needs should be strongly taken into account.

Radiation dose and image quality in dental cone beam computed tomography

2014 ◽  
Vol 30 ◽  
pp. e86
Author(s):  
Olivera Ciraj-Bjelac ◽  
Danijela Arandjic ◽  
Predrag Bozovic ◽  
Jelena Stankovic ◽  
Sandra Ceklic
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Cone Beam Computed Tomography ◽  
Cone Beam

scholarly journals Experiences with image quality and radiation dose of cone beam computed tomography (CBCT) and multidetector computed tomography (MDCT) in pediatric extremity trauma

2020 ◽  
Vol 49 (12) ◽  
pp. 1939-1949
Author(s):  
Sebastian Tschauner ◽  
Robert Marterer ◽  
Eszter Nagy ◽  
Georg Singer ◽  
Michael Riccabona ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Multidetector Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Motion Artifacts ◽  
Cone Beam ◽  
Beam Hardening ◽  
Ct Dose ◽  
Diagnostic Certainty

Abstract Introduction Novel dedicated extremity cone beam computed tomography (CBCT) devices, recently introduced to the market, raised attention as a possible alternative in advanced diagnostic pediatric trauma imaging, today usually performed by multidetector computed tomography (MDCT). This work aimed to compare image quality and radiation dose of CBCT and MDCT. Materials and methods Fifty-four CBCT-MDCT examination pairs, containing nine MDCTs acquired in parallel prospectively and 45 MDCTs matched in retrospect, were included in this study. Image quality was analyzed semi-objectively by measuring noise, contrast-to-noise ratio (CNR), and signal-to-noise ratios (SNR) and subjectively by performing image impression ratings. CT dose records were readout. Results Image noise was significantly lower in CBCT compared with MDCT, both semi-objectively and subjectively (both p < 0.001). CNR and SNRs were also in favor of CBCT, though CBCT examinations exhibited significantly more beam hardening artifacts that diminished the advantages of the superior semi-objective image quality. These artifacts were believed to occur more often in children due to numerous bone-cartilage transitions in open growth plates and may have led to a better subjective diagnostic certainty rating (p = 0.001). Motion artifacts were infrequently, but exclusively observed in CBCT. CT dose index (CTDIvol) was substantially lower in CBCT (p < 0.001). Conclusion Dedicated extremity CBCT could be an alternative low-dose modality in the diagnostic pathway of pediatric fractures. At lower doses compared with MDCT and commonly affected by beam hardening artifacts, semi-objective CBCT image quality parameters were generally better than in MDCT.

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