Effects of tube current on cone-beam computerized tomography image quality for presurgical implant planning in vitro

Sur, Jaideep; Seki, Kazuhiko; Koizumi, Hiroshi; Nakajima, Kei; Okano, Toshio

doi:10.1016/j.tripleo.2010.03.041

Cited by 49 publications

(49 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3,5 No randomized controlled trials were found during the literature search. Of the 22 other full-text articles included in the review, 10 studies looked at the effect of altering the current, [19][20][21][22][23][24][25][26][27][28] 6 studies at altering kilovoltage 19,20,23,24,26,27 and 18 studies at altering exposure time factors 19,21,22,[24][25][26][27][29][30][31][32][33][34][35][36][37][38][39] (some studies looked at more than one exposure parameter, so this total equals .20 studies). One study 40 investigated the combined effect of current and exposure times on image quality by altering mAs values.…”

Section: Resultsmentioning

confidence: 99%

Dose optimization by altering the operating potential and tube current exposure time product in dental cone beam CT: a systematic review

Goulston

Davies

Horner

et al. 2016

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

Objectives: Current guidelines highlight the need to optimize exposure parameters on CBCT equipment to levels that are as low as diagnostically acceptable. This systematic review aimed to answer the question "Can altering operating potential (kV) and tube current exposure time product (mAs) on CBCT machines reduce radiation dose to patients undergoing dental and/ or maxillofacial scans without a detrimental impact on image quality/diagnostic accuracy?" Methods: Studies were selected and results reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) method. For each individual study, two authors (RG and JD or KH) independently extracted data using a specifically designed collection form, and an overall quality value was assigned using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) system. Any disagreements in the overall quality value of a study were resolved by discussion between the current authors. Results: Nearly 75% of studies were considered to be of low or very low methodological quality using the GRADE system, and more studies stated that their results applied only in the specific situations they had investigated. However, most studies demonstrated that patient dose reduction is possible without a clinically relevant reduction in image quality. Conclusions: For many CBCT machines, it should be possible to optimize one, or more, of the investigated exposure parameters and therefore reduce patient radiation dose, while maintaining diagnostic image quality for some diagnostic tasks. However, more rigorous research is still required.

show abstract

Section: Resultsmentioning

confidence: 99%

Dose optimization by altering the operating potential and tube current exposure time product in dental cone beam CT: a systematic review

Goulston

Davies

Horner

et al. 2016

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

show abstract

“…[9][10][11][12][13][14][15][16][17][18][19][20] Most of these have been aimed at the use of CBCT in implant dentistry, while others have investigated the impact on diagnosis of simulated root resorption and periapical pathosis. Only two studies have specifically looked at orthodontic-related applications of CBCT.…”

Section: Discussionmentioning

confidence: 99%

“…Others have found that there is scope for reducing exposure factors without loss of adequate image quality in various clinical contexts. [9][10][11][12][13][14][15][16][17][18][19][20] Low-dose protocols are a familiar optimization strategy for "medical" CT, 21 but there is almost no comparable literature related to dental CBCT. The impact of low-dose scanning protocols on objective measurements of image quality, available on one CBCT machine, has been assessed, 22 but this study did not include a subjective image quality assessment of clinical images.…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…20 Reducing tube current causes an increase in image noise. 22,24 However, noise could be reduced by the use of a non-linear edgepreserving smoothing filter. 30 In clinical circumstances, low tube current is mostly used when a large FOV with a large resultant voxel size is needed, and high tube current is selected when a small FOV with small resultant voxel size is required.…”

Section: Discussionmentioning

confidence: 99%

“…22 Based on subjective evaluation, significant reduction in peak kilovoltage and milliampere value did not substantially affect overall image quality. 23,24 Various radiation doses from four CBCT scanners rendered different image qualities in terms of segmentation accuracy. 25 The requisites of image quality change according to the various types of examination or even various purposes within the same examinations.…”

Section: Introductionmentioning

confidence: 99%

Effect of electric potential and current on mandibular linear measurements in cone beam CT

Panmekiate

Apinhasmit²,

Petersson³

2012

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

Objectives: The purpose of this study was to compare mandibular linear distances measured from cone beam CT (CBCT) images produced by different radiographic parameter settings (peak kilovoltage and milliampere value). Methods: 20 cadaver hemimandibles with edentulous ridges posterior to the mental foramen were embedded in clear resin blocks and scanned by a CBCT machine (CB MercuRay TM ; Hitachi Medico Technology Corp., Chiba-ken, Japan). The radiographic parameters comprised four peak kilovoltage settings (60 kVp, 80 kVp, 100 kVp and 120 kVp) and two milliampere settings (10 mA and 15 mA). A 102.4 mm field of view was chosen. Each hemimandible was scanned 8 times with 8 different parameter combinations resulting in 160 CBCT data sets. On the cross-sectional images, six linear distances were measured. To assess the intraobserver variation, the 160 data sets were remeasured after 2 weeks. The measurement precision was calculated using Dahlberg's formula. With the same peak kilovoltage, the measurements yielded by different milliampere values were compared using the paired t-test. With the same milliampere value, the measurements yielded by different peak kilovoltage were compared using analysis of variance. A significant difference was considered when p , 0.05. Results: Measurement precision varied from 0.03 mm to 0.28 mm. No significant differences in the distances were found among the different radiographic parameter combinations. Conclusions: Based upon the specific machine in the present study, low peak kilovoltage and milliampere value might be used for linear measurements in the posterior mandible.

show abstract

Effects of tube current on cone-beam computerized tomography image quality for presurgical implant planning in vitro

Cited by 49 publications

References 13 publications

Dose optimization by altering the operating potential and tube current exposure time product in dental cone beam CT: a systematic review

Dose optimization by altering the operating potential and tube current exposure time product in dental cone beam CT: a systematic review

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

Effect of electric potential and current on mandibular linear measurements in cone beam CT

Contact Info

Product

Resources

About