Assessment of protocols in cone-beam CT with symmetric and asymmetric beams usingeffective dose and air kerma-area product

Batista, Wilson Otto; Soares, Maria Rosangela; Oliveira, Marcus; Maia, Ana F.; Caldas, Linda V.E.

doi:10.1016/j.apradiso.2015.01.014

Cited by 3 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the difference in equivalent dose values between the two devices was 48%. Another factor related to the lower doses obtained in the Gendex was the use of an asymmetrical beam, as described by Scarfe and Farman (2008) and Batista et al (2015). This asymmetric beam was obtained by decentralizing the isocenter of the beam so that the central beam focused on the object's margin, focusing on one side more than the other.…”

Section: Resultsmentioning

confidence: 99%

Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

Oliveira

Andrade

Batista

et al. 2015

Braz. arch. biol. technol.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

Oliveira

Andrade

Batista

et al. 2015

Braz. arch. biol. technol.

Self Cite

View full text Add to dashboard Cite

show abstract

Monte Carlo simulation of a cone-beam CT system for lightweight casts

Tran

Bui

Tran

et al. 2021

Radiat Detect Technol Methods

View full text Add to dashboard Cite

Dosimetry of Critical Organs in Maxillofacial Imaging with Cone-beam Computed Tomography

et al. 2019

View full text Add to dashboard Cite

Background: While the benefits of cone-beam computed tomography (CBCT) are well known in maxillofacial imaging, the use of this modality is not risk-free.Objective: The aim of this study was to evaluate the exposure doses received by patients during maxillofacial imaging with CBCT.Methods: Entrance surface dose (ESD) was measured by using thermoluminescent dosimeters (TLDs) attached to the eyes lids, parotid glands and thyroid of 64 patients in two imaging centers (A and B). Phantom dosimetry was performed by a cylindrical poly-methyl methacrylate (PMMA) head-size phantom and an ionization chamber for different exposure parameters. NewTom VGi and Planmeca Promax 3D CBCT scanners were used at centers A and B, respectively.Results: The mean ESD of the eyes, parotid glands and thyroid were 2.57, 2.33 and 0.28 mGy in center A, 0.35, 2.11 and 0.37 mGy in center B, respectively. ESD of the eyes revealed a significant difference in two centers; in center B, it was 86.4% lower than center A. In the phantom dosimetry, the measured doses of NewTom VGi were 2.63 and 2.08 mGy, respectively by changing field of view (FOV) size from 8×8 cm2 (height × diameter) to 6×6 cm2. For Planmeca Promax 3D, it ranged from 0.98 to 3.24 mGy depending on exposure parameters.Conclusion: There is a wide range of radiation doses dependent on the units, patients and selected scan parameters. Inappropriate selection of exposure settings, especially FOV size, can seriously increase patient dose.

show abstract

Assessment of protocols in cone-beam CT with symmetric and asymmetric beams usingeffective dose and air kerma-area product

Cited by 3 publications

References 10 publications

Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography

Monte Carlo simulation of a cone-beam CT system for lightweight casts

Dosimetry of Critical Organs in Maxillofacial Imaging with Cone-beam Computed Tomography

Contact Info

Product

Resources

About