scholarly journals Teleconsultation for pre-operative evaluation during the coronavirus disease 2019 pandemic

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Jan Wienhold ◽  
Lucas Mösch ◽  
Rolf Rossaint ◽  
Ilka Kemper ◽  
Matthias Derwall ◽  
...  
Keyword(s):  
Operative Evaluation

Essentials in the Post-operative Evaluation of Congenital Heart Disease

2009 ◽  
Vol 6 (2) ◽  
pp. 107-114
Author(s):  
Jonathan N Johnson ◽  
Frank Cetta ◽  
◽  
◽  
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
Operative Evaluation

scholarly journals Computer-assisted contralateral side comparison of the ankle joint using flat panel technology

2021 ◽  
Author(s):  
Sarina Thomas ◽  
Lisa Kausch ◽  
Holger Kunze ◽  
Maxim Privalov ◽  
André Klein ◽  
...  
Keyword(s):  
Information Gain ◽  
Contralateral Side ◽  
Computer Assisted ◽  
Ankle Joints ◽  
Additional Radiation ◽  
Median Position ◽  
Operative Evaluation ◽  
Overall Performance ◽  
The Individual ◽  
Segmentation Problem

Abstract Purpose Reduction and osteosynthesis of ankle fractures is a challenging surgical procedure when it comes to the verification of the reduction result. Evaluation is conducted using intra-operative imaging of the injured ankle and depends on the expertise of the surgeon. Studies suggest that intra-individual variance of the ankle bone shape and pose is considerably lower than the inter-individual variance. It stands to reason that the information gain from the healthy contralateral side can help to improve the evaluation. Method In this paper, an assistance system is proposed that provides a side-to-side view of the two ankle joints for visual comparison and instant evaluation using only one 3D C-arm image. Two convolutional neural networks (CNN) are employed to extract the relevant image regions and pose information of each ankle so that they can be aligned with each other. A first U-Net uses a sliding window to predict the location of each ankle. The standard plane estimation is formulated as segmentation problem so that a second U-Net predicts the three viewing planes for alignment. Results Experiments were conducted to assess the accuracy of the individual steps on 218 unilateral ankle datasets as well as the overall performance on 7 bilateral ankle datasets. The experiments on unilateral ankles yield a median position-to-plane error of $$0.73\pm 1.36$$ 0.73 ± 1.36 mm and a median angular error between 2.98$$^\circ $$ ∘ and 3.71$$^\circ $$ ∘ for the plane normals. Conclusion Standard plane estimation via segmentation outperforms direct pose regression. Furthermore, the complete pipeline was evaluated including ankle detection and subsequent plane estimation on bilateral datasets. The proposed pipeline enables a direct contralateral side comparison without additional radiation. This has the potential to ease and improve the intra-operative evaluation for the surgeons in the future and reduce the need for revision surgery.

Excision of nasopharyngeal angiofibroma facilitated by intra-operative 3D-image guidance

2000 ◽  
Vol 114 (4) ◽  
pp. 311-313 ◽  
Author(s):  
A. Murray ◽  
M. Falconer ◽  
G. W. McGarry
Keyword(s):  
Image Guidance ◽  
Juvenile Nasopharyngeal Angiofibroma ◽  
3D Image ◽  
Nasopharyngeal Angiofibroma ◽  
Infra Red ◽  
Operative Evaluation ◽  
Guidance Systems ◽  
Operative Assessment

The latest 3D-image guidance systems to assist surgeons have greatly improved over earlier models. We describe the use of an optical infra-red system to assist in the removal of a juvenile nasopharyngeal angiofibroma. The specific advantages of this system in pre-operative assessment, intra-operative evaluation and excision of the angiofibroma are discussed.

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