A comparative study for spatial resolution and subjective image characteristics of a multi-slice CT and a cone-beam CT for dental use

Watanabe, Hiroshi; Honda, Eiichi; Tetsumura, Akemi; Kurabayashi, Tohru

doi:10.1016/j.ejrad.2009.09.023

Cited by 99 publications

(76 citation statements)

References 9 publications

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“…[32][33][34][35] The SedentexCT IQ phantom Pauwels et al 36 was used in this study for objective measurement of image quality because it was specifically designed for dental CBCT and was readily available to us. However, the SedentexCT IQ phantom represents an adult head with no paediatric equivalent phantom being available at the time of the study.…”

Section: Discussionmentioning

confidence: 99%

Development of a low-dose protocol for cone beam CT examinations of the anterior maxilla in children

Hidalgo

Horner

Thiruvenkatachari

et al. 2015

BJR

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Objective: The aim of this study was to develop a low-dose protocol suitable for cone beam CT (CBCT) examination of an impacted maxillary canine in children by using a combination of dosimetry with subjective and objective image quality assessment.Methods: Radiation dose and image quality measurements were made using a dental CBCT machine. An image quality phantom was used to investigate the relationship between objective image quality and dosearea product (DAP) for a broad range of exposure settings. Subjective image quality assessment was achieved using a paediatric skull phantom submerged in a water bath for the same range of exposure settings. Eight clinicians assessed each CBCT data set for nine aspects of image quality using a five-point rating scale of agreement.

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Section: Discussionmentioning

confidence: 99%

Development of a low-dose protocol for cone beam CT examinations of the anterior maxilla in children

Hidalgo

Horner

Thiruvenkatachari

et al. 2015

BJR

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“…3,13 CBCT can achieve a high spatial resolution and display more characteristic radiographic findings. 14,15 It is suitable for the radiolographic diagnosis of jawbone lesions and odontogenic tumours with hard-tissue components. 2,15,16 However, few descriptions of the CBCT features of OM have been published.…”

Section: Introductionmentioning

confidence: 99%

Characteristic features of the odontogenic myxoma on cone beam computed tomography

Wang¹,

Guo²,

Meng³

et al. 2017

Dentomaxillofacial Radiology

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Objectives: To illustrate the characteristic features of odontogenic myxoma (OM) on CBCT. Methods: From 52 subjects with histopathologically diagnosed OMs, 18 subjects who underwent a CBCT examination were retrieved between May 2009 and April 2016. Features on CBCT images and clinical records were carefully observed and analyzed. Results: Characteristic features include: (1) fine and straight septa that were recognized to separate the tumour into triangular, square or rectangular spaces, which appeared as "tennis racket" or "honeycomb" patterns; (2) septa that frequently scattered to the borders of lesions and appeared perpendicular to the margins; (3) tooth displacement and resorption that were seen in most of the OM lesions; (4) OMs that were noted to have a tendency to involve the alveolar process, scallop between the roots and affect the integrity of the alveolar ridge; (5) the cortex of OMs that appeared normally perforated and the edge of the cortex expanded into the soft tissue. Conclusions: CBCT is highly effective in demonstrating the comprehensive internal structures of the lesions precisely and providing detailed information for the diagnosis of OM.

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“…They differ in several technical characteristics, notably their spatial resolution, which is defined by the size of the acquisition voxel. [1][2][3][4][5] The clinical applications differ according to the size of the field of view (FOV) of the CBCT scanner. The smaller the FOV, the better the spatial resolution and the smaller the voxel size.…”

Section: Introductionmentioning

confidence: 99%

Effect of voxel size on the accuracy of 3D reconstructions with cone beam CT

Maret¹,

Telmon²,

Peters³

et al. 2012

Dentomaxillofacial Radiology

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Objectives: The various types of cone beam CT (CBCT) differ in several technical characteristics, notably their spatial resolution, which is defined by the acquisition voxel size. However, data are still lacking on the effects of voxel size on the metric accuracy of threedimensional (3D) reconstructions. This study was designed to assess the effect of isotropic voxel size on the 3D reconstruction accuracy and reproducibility of CBCT data. Methods: The study sample comprised 70 teeth (from the Institut d'Anatomie Normale, Strasbourg, France). The teeth were scanned with a KODAK 9500 3DH CBCT (Carestream Health, Inc., Marne-la-Vallée, France), which has two voxel sizes: 200 mm (CBCT 200 mm group) and 300 mm (CBCT 300 mm group). These teeth had also been scanned with the KODAK 9000 3DH CBCT (Carestream Health, Inc.) (CBCT 76 mm group) and the SCANCO Medical micro-CT XtremeCT (SCANCO Medical, Brü ttisellen, Switzerland) (micro-CT 41 mm group) considered as references. After semi-automatic segmentation with AMIRAH software (Visualization Sciences Group, Burlington, MA), tooth volumetric measurements were obtained. Results: The Bland-Altman method showed no difference in tooth volumes despite a slight underestimation for the CBCT 200 mm and 300 mm groups compared with the two reference groups. The underestimation was statistically significant for the volumetric measurements of the CBCT 300 mm group relative to the two reference groups (Passing-Bablok method). Conclusions: CBCT is not only a tool that helps in diagnosis and detection but it has the complementary advantage of being a measuring instrument, the accuracy of which appears connected to the size of the voxels. Future applications of such measurements with CBCT are discussed.

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A comparative study for spatial resolution and subjective image characteristics of a multi-slice CT and a cone-beam CT for dental use

Cited by 99 publications

References 9 publications

Development of a low-dose protocol for cone beam CT examinations of the anterior maxilla in children

Development of a low-dose protocol for cone beam CT examinations of the anterior maxilla in children

Characteristic features of the odontogenic myxoma on cone beam computed tomography

Effect of voxel size on the accuracy of 3D reconstructions with cone beam CT

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