scholarly journals Application of Three-Dimensional Computed Tomography Improved the Interrater Reliability of the AO/OTA Classification Decision in a Patellar Fracture

2021 ◽  
Vol 10 (15) ◽  
pp. 3256
Author(s):  
Seong-Eun Byun ◽  
Oog-Jin Shon ◽  
Jae-Ang Sim ◽  
Yong-Bum Joo ◽  
Ji-Wan Kim ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Interrater Reliability ◽  
Three Dimensional ◽  
Treatment Recommendations ◽  
Ct Imaging ◽  
Plain Radiography ◽  
Imaging Modalities ◽  
Patellar Fracture ◽  
Patellar Fractures

We investigated whether interrater reliabilities of the AO/OTA classification of patellar fracture and treatment recommendations change with the imaging modalities applied, including plain radiography and two- and three-dimensional (2-D and 3-D) computed tomography (CT). Seven orthopedic specialists and four orthopedic residents completed a survey of 50 patellar fractures to classify the fractures according to the AO/OTA classification for patellar fractures. Initially, the survey was conducted using plain radiography only, then with 2-D CT introduced three weeks later and 3-D CT introduced six weeks later. Fleiss’ Kappa coefficients were calculated to determine interrater reliability, respectively. The overall interrater reliability of the AO/OTA classifications was 0.40 (95% CI, 0.38–0.42) with plain radiography only and 0.43 (95% CI, 0.41–0.45) with the addition of 2-D CT. With the addition of 3-D CT, the reliability was significantly improved to 0.54 (95% CI, 0.52–0.56). In specialists, interrater reliability of the classifications was moderate with all three imaging modalities. With the use of 3-D CT, interrater reliability of the classification was 0.53 (95% CI, 0.50–0.56), which was significantly higher than that with the use of 2-D CT (κ = 0.45; 95% CI, 0.42–0.48). In residents, interrater reliability of the classification was 0.30 (95% CI, 0.24–0.36) with plain radiography. The reliability improved to 0.49 (95% CI, 0.43–0.56) with the addition of 2-D CT, which was significantly higher than that with plain radiography only. The use of 3-D CT imaging improved interrater reliability of the classification. Therefore, surgeons, especially residents, may benefit from using 3-D CT imaging for classifying and planning the treatment of patellar fractures.

scholarly journals Accuracy of Commonly-Used Imaging Modalities in Assessing Left Atrial Appendage for Interventional Closure: Review Article

2018 ◽  
Vol 7 (11) ◽  
pp. 441 ◽  
Author(s):  
Ramez Morcos ◽  
Haider Al Taii ◽  
Priya Bansal ◽  
Joel Casale ◽  
Rupesh Manam ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Transesophageal Echocardiography ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Atrial Appendage ◽  
Imaging Modalities ◽  
Three Dimensional Printing ◽  
Dimensional Printing

Periprocedural imaging assessment for percutaneous Left Atrial Appendage (LAA) transcatheter occlusion can be obtained by utilizing different imaging modalities including fluoroscopy, magnetic resonance imaging (MRI), computed tomography (CT), and ultrasound imaging. Given the complex and variable morphology of the left atrial appendage, it is crucial to obtain the most accurate LAA dimensions to prevent intra-procedural device changes, recapture maneuvers, and prolonged procedure time. We therefore sought to examine the accuracy of the most commonly utilized imaging modalities in LAA occlusion. Institutional Review Board (IRB) approval was waived as we only reviewed published data. By utilizing PUBMED which is an integrated online website to list the published literature based on its relevance, we retrieved thirty-two articles on the accuracy of most commonly used imaging modalities for pre-procedural assessment of the left atrial appendage morphology, namely, two-dimensional transesophageal echocardiography, three-dimensional transesophageal echocardiography, computed tomography, and three-dimensional printing. There is strong evidence that real-time three-dimensional transesophageal echocardiography is more accurate than two-dimensional transesophageal echocardiography. Three-dimensional computed tomography has recently emerged as an imaging modality and it showed exceptional accuracy when merged with three-dimensional printing technology. However, real time three-dimensional transesophageal echocardiography may be considered the preferred imaging modality as it can provide accurate measurements without requiring radiation exposure or contrast administration. We will present the most common imaging modality used for LAA assessment and will provide an algorithmic approach including preprocedural, periprocedural, intraprocedural, and postprocedural.

scholarly journals Diagnosis of COVID-19 Infection Using Three-Dimensional Semantic Segmentation and Classification of Computed Tomography Images

2021 ◽  
Vol 68 (2) ◽  
pp. 2451-2467
Author(s):  
Javaria Amin ◽  
Muhammad Sharif ◽  
Muhammad Almas Anjum ◽  
Yunyoung Nam ◽  
Seifedine Kadry ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Semantic Segmentation ◽  
Computed Tomography Images

A comprehensive classification of craniofacial fractures: postmortem and clinical studies with two- and three-dimensional computed tomography

Injury ◽  
2002 ◽  
Vol 33 (8) ◽  
pp. 651-668 ◽  
Author(s):  
Carlos H Buitrago-Téllez ◽  
Wilfried Schilli ◽  
Michael Bohnert ◽  
Kurt Alt ◽  
Martin Kimmig
Keyword(s):  
Computed Tomography ◽  
Clinical Studies ◽  
Three Dimensional ◽  
Comprehensive Classification ◽  
Craniofacial Fractures

scholarly journals Classification of Computed Tomography Images in Different Slice Positions Using Deep Learning

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Hiroyuki Sugimori
Keyword(s):  
Computed Tomography ◽  
Ct Imaging ◽  
Classification Models ◽  
Training Models ◽  
Computed Tomography Images ◽  
Contrast Enhanced ◽  
Noncontrast Ct ◽  
Time Required ◽  
The Relationship

This study aimed at elucidating the relationship between the number of computed tomography (CT) images, including data concerning the accuracy of models and contrast enhancement for classifying the images. We enrolled 1539 patients who underwent contrast or noncontrast CT imaging, followed by dividing the CT imaging dataset for creating classification models into 10 classes for brain, neck, chest, abdomen, and pelvis with contrast-enhanced and plain imaging. The number of images prepared in each class were 100, 500, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, and 10,000. Accordingly, the names of datasets were defined as 0.1K, 0.5K, 1K, 2K, 3K, 4K, 5K, 6K, 7K, 8K, 9K, and 10K, respectively. We subsequently created and evaluated the models and compared the convolutional neural network (CNN) architecture between AlexNet and GoogLeNet. The time required for training models of AlexNet was lesser than that for GoogLeNet. The best overall accuracy for the classification of 10 classes was 0.721 with the 10K dataset of GoogLeNet. Furthermore, the best overall accuracy for the classification of the slice position without contrast media was 0.862 with the 2K dataset of AlexNet.

scholarly journals Implications of Classification of Os Trigonum: A Study Based on Computed Tomography Three-Dimensional Imaging

2019 ◽  
Vol 25 ◽  
pp. 1423-1428 ◽  
Author(s):  
Xiaoyong Fu ◽  
Li Ma ◽  
Yan Zeng ◽  
Qizhou He ◽  
Fei Yu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Three Dimensional Imaging ◽  
Os Trigonum

scholarly journals Do We Really Need to Worry About Calcaneocuboid Subluxation During Lateral Column Lengthening for Planovalgus Foot Deformity?

2020 ◽  
Vol 5 (4) ◽  
pp. 2473011420S0024
Author(s):  
Brittany Hedrick ◽  
Anthony Riccio ◽  
Matthew Siebert ◽  
Claire Shivers ◽  
Mitchell Harris ◽  
...  
Keyword(s):  
Articular Surface ◽  
Three Dimensional ◽  
Porous Titanium ◽  
Ct Imaging ◽  
Plain Radiography ◽  
Matched Pair ◽  
Cross Sectional ◽  
Lateral Column ◽  
Lateral Column Lengthening ◽  
Rotatory Subluxation

Category: Midfoot/Forefoot; Other Introduction/Purpose: While lengthening of the lateral column through a calcaneal neck osteotomy is an integral component of flatfoot reconstruction in younger patients with flexible planovalgus deformities, the procedure has been implicated in iatrogenic calcaneocuboid (CC) subluxation and subsequent degenerative changes at the CC articulation. The purpose of this study is to characterize alterations at the CC joint following lateral column lengthening (LCL) as well as to determine if Steinman pin stabilization of the CC joint prior to distraction maintains a normal CC relationship. Methods: Seven matched pairs of fresh frozen cadaveric feet underwent pre-procedure plain radiography and cross-sectional computed tomography (CT) imaging. LCL via a calcaneal neck osteotomy was then performed. One foot of each matched pair had a single smooth Steinman pin placed centrally across the CC joint prior to osteotomy distraction. Distraction across each osteotomy was then performed and maintained with a 12mm porous titanium wedge. Repeat imaging was obtained and compared to pre-procedure studies to quantify sagittal and rotational differences at the CC articulation Results: Following LCL, plain radiography demonstrated statistically significant increases in the percentage of the calcaneal articular surface dorsal to the superior aspect of the cuboid in both the pinned (8.2% vs 17.6%, p=0.02) and unpinned (12.5% vs 16.3%, p=0.04) specimens. No difference in the percentage of subluxation was found between the two groups following LCL. CT imaging demonstrated statistically significant increases in rotation between the calcaneus and cuboid following LCL in both the pinned (7.6O +- 5.6O, p=0.01) and unpinned (17O +- 12.3O, p=0.01) specimens. Though a greater degree of rotation was present in the unpinned specimens following LCL, this difference was not statistically significant (p=0.28). Conclusion: Both sagittal and rotatory subluxation seem to occur at the CC joint following LCL regardless of pin stabilization. As a single pin would be expected to limit pure translation while having little effect on rotation, it is possible that the rotational changes identified on three-dimensional imaging are interpreted as dorsal translation when viewed two dimensionally using plain radiography. Consideration should therefore be given to CC stabilization with two pins during LCL to prevent this rotatory subluxation.

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