A meta-review using the ROBIS tool of effective doses in dental and maxillofacial cone beam CT

2021 ◽  
pp. 20210042
Author(s):  
Ayman Al-Okshi ◽  
Keith Horner ◽  
Madeleine Rohlin
Keyword(s):  
Image Quality ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Quality Of Reporting ◽  
Eligibility Criteria ◽  
Study Selection ◽  
Significant Difference ◽  
Meta Review ◽  
Effective Doses ◽  
Operating Potential

Objectives: To apply the ROBIS tool for assessment of risk of bias (RoB) in systematic reviews (SRs) in a meta-review on effective doses (EDs) in dental and maxillofacial cone beam CT. Methods: Three electronic databases and reference lists of included SRs were searched. Eligible SRs were classified as having low, high or unclear RoB. Findings of SRs were synthesised and data from primary studies combined to relate ED to field of view (FOV) and operating potential (kV). Results: Seven SRs were included: three displayed low RoB, three high and one had unclear RoB. Only one SR related ED to image quality. Deficiencies in reporting of eligibility criteria, study selection and synthesis of results in SRs were identified. Median ED for three FOV categories differed significantly (p < 0.001) but there was no significant difference in median ED between three operating potential groups. Conclusion: The ROBIS tool should have a role for meta-reviews of different aspects of radiology. The disappointing results for RoB might be remedied by developing standards to improve the quality of reporting of primary dosimetry studies and of SRs. There is a continuing need to perform dosimetry studies, although relating ED to image quality or diagnostic accuracy would add value. Advances in knowledge: This meta-review is the first in radiology to implement ROBIS to assess RoB in SRs of ED and identified that the trustworthiness of some SRs is questionable. The results underpin the importance of FOV dimensions as a determinant of ED in CBCT.

scholarly journals 3D cone-beam CT with a twin robotic x-ray system in elbow imaging: comparison of image quality to high-resolution multidetector CT

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Jan-Peter Grunz ◽  
Andreas Max Weng ◽  
Andreas Steven Kunz ◽  
Maike Veyhl-Wichmann ◽  
Rainer Schmitt ◽  
...  
Keyword(s):  
High Resolution ◽  
Image Quality ◽  
Multidetector Ct ◽  
Cone Beam Ct ◽  
Intraclass Correlation ◽  
Cone Beam ◽  
Single Measure ◽  
X Ray ◽  
Mdct Image ◽  
Significant Difference

Abstract Background Elbow imaging is challenging with conventional multidetector computed tomography (MDCT), while cone-beam CT (CBCT) provides superior options. We compared intra-individually CBCT versus MDCT image quality in cadaveric elbows. Methods A twin robotic x-ray system with new CBCT mode and a high-resolution clinical MDCT were compared in 16 cadaveric elbows. Both systems were operated with a dedicated low-dose (LD) protocol (equivalent volume CT dose index [CTDIvol(16 cm)] = 3.3 mGy) and a regular clinical scan dose (RD) protocol (CTDIvol(16 cm) = 13.8 mGy). Image quality was evaluated by two radiologists (R1 and R2) on a seven-point Likert scale, and estimation of signal intensity in cancellous bone was conducted. Wilcoxon signed-rank tests and intraclass correlation coefficient (ICC) statistics were used. Results The CBCT prototype provided superior subjective image quality compared to MDCT scans (for RD, p ≤ 0.004; for LD, p ≤ 0.001). Image quality was rated very good or excellent in 100% of the cases by both readers for RD CBCT, 100% (R1) and 93.8% (R2) for LD CBCT, 62.6% and 43.8% for RD MDCT, and 0.0% and 0.0% for LD MDCT. Single-measure ICC was 0.95 (95% confidence interval 0.91–0.97; p < 0.001). Software-based assessment supported subjective findings with less “undecided” pixels in CBCT than dose-equivalent MDCT (p < 0.001). No significant difference was found between LD CBCT and RD MDCT. Conclusions In cadaveric elbow studies, the tested cone-beam CT prototype delivered superior image quality compared to high-end multidetector CT and showed a potential for considerable dose reduction.

scholarly journals Comparison of a Dental Cone Beam CT with a Multi-detector Row CT on Effective Doses and Physical Image Quality

2011 ◽  
Vol 67 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Yutaka Yoshida ◽  
Kenji Tokumori ◽  
Kazutoshi Okamura ◽  
Kazunori Yoshiura
Keyword(s):  
Image Quality ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Effective Doses

Dose and Image Quality Evaluation of a Dedicated Cone-Beam CT System for High-Contrast Neurologic Applications

2010 ◽  
Vol 194 (2) ◽  
pp. W193-W201 ◽  
Author(s):  
Lifeng Yu ◽  
Thomas J. Vrieze ◽  
Michael R. Bruesewitz ◽  
James M. Kofler ◽  
David R. DeLone ◽  
...  
Keyword(s):  
Image Quality ◽  
Quality Evaluation ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
High Contrast ◽  
Image Quality Evaluation ◽  
Ct System

A 3D printed phantom for Image Quality Assessment in Cone-beam CT

2018 ◽  
Vol 52 ◽  
pp. 170
Author(s):  
James O’Halloran ◽  
Paddy Gilligan ◽  
Sinead Cleary ◽  
Susan Maguire ◽  
Gerald O’Connor ◽  
...  
Keyword(s):  
Image Quality ◽  
Quality Assessment ◽  
Image Quality Assessment ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
3D Printed

Improved image quality of cone beam CT scans for radiotherapy image guidance using fiber-interspaced antiscatter grid

2014 ◽  
Vol 41 (6Part1) ◽  
pp. 061910 ◽  
Author(s):  
Uros Stankovic ◽  
Marcel van Herk ◽  
Lennert S. Ploeger ◽  
Jan-Jakob Sonke
Keyword(s):  
Image Quality ◽  
Image Guidance ◽  
Cone Beam Ct ◽  
Ct Scans ◽  
Cone Beam ◽  
Antiscatter Grid

scholarly journals EP-1854: Variations of coefficients for estimating effective doses of cone beam CT scans

2018 ◽  
Vol 127 ◽  
pp. S1000-S1001
Author(s):  
A. Abuhaimed ◽  
C.J. Martin ◽  
O. Demirkaya
Keyword(s):  
Cone Beam Ct ◽  
Ct Scans ◽  
Cone Beam ◽  
Effective Doses

Gingival thickness assessment at mandibular incisors of orthodontic patients with ultrasound and cone-beam ct.

2019 ◽  
Author(s):  
Dimitrios Kloukos ◽  
Lydia Kakali ◽  
George Koukos ◽  
Anton Sculean ◽  
Andreas Stavropoulos ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Point Estimate ◽  
Central Incisor ◽  
Gingival Thickness ◽  
Significant Difference ◽  
Orthodontic Patients ◽  
Clinically Significant ◽  
The Right ◽  
Mandibular Incisors

Abstract Background Quantitative and qualitative analysis of several periodontal parameters plays an important role in several dental procedures. Aim of the current study was to assess gingival thickness (GT) at mandibular incisors of orthodontic patients with two methods and determine how these methods are compared to each other when assessing periodontal anatomy through soft tissue thickness.Methods The sample consisted of 40 consecutive adult orthodontic patients. GT was measured at both central mandibular incisors, mid-facially on the buccal aspect, 2mm apically to the free gingival margin with two methods: a) clinically with an Ultrasound device (USD) and b) radiographically with Cone Beam Computed Tomography (CBCT).Results CBCT measurements were consistently higher than USD measurements, with the difference ranging from 0.13 mm to 0.21 mm. No difference was noted between the repeated CBCT measurements at the right central incisor (Bias= 0.05 mm; 95% CI= -0.01, 0.11, p=0.104). Although the respective results for the left incisor indicated, statistically, that the measurements were not exactly replicated, the magnitude of the point estimate was small and not clinically significant (Bias= 0.06 mm; 95% CI= 0.01, 0.11, p=0.014). Small differences between CBCT measurements made by the 2 examiners at the left central incisor (bias= 0.06 mm, 95% CI= 0.01, 0.11, p=0.014) were detected. However, this difference was minor, and again, not clinically significant. The respective analysis on the right incisor showed no significant difference (bias= 0.05 mm, 95% CI= -0.01, 0.11, p=0.246).Conclusions Present data indicate that CBCT measurements were highly reproducible and yielded greater values compared to USD measurements.

Sign in / Sign up

Export Citation Format

Share Document