Search

Your search keyword '"Charl P. Botha"' showing total 133 results
Start Over Author "Charl P. Botha"
133 results on '"Charl P. Botha"'

45. Visualization in Connectomics

Author

Hanspeter Pfister, Verena Kaynig, Charl P. Botha, Stefan Bruckner, Vincent J. Dercksen, Hans-Christian Hege, and Jos B. T. M. Roerdink

Published
2012

50. A fluoroscopy-based planning and guidance software tool for minimally invasive hip refixation by cement injection

Author

Bas van den Berg, Stefan van der Walt, Charl P. Botha, Daniel F. Malan, Rob G H H Nelissen, Edward R. Valstar, Renata Georgia Raidou, Berend C. Stoel, and Medical Image Analysis

Subjects
Percutaneous, Arthroplasty, Replacement, Hip, medicine.medical_treatment, Prosthesis, 030218 nuclear medicine & medical imaging, 0302 clinical medicine, Fluoroscopy, 030222 orthopedics, Injection Procedure, medicine.diagnostic_test, Bone Cements, General Medicine, Bone cement, Computer Graphics and Computer-Aided Design, Computer Science Applications, surgical procedures, operative, Radiology Nuclear Medicine and imaging, Hip arthroplasty, Pre-operative planning, Original Article, Computer Vision and Pattern Recognition, Radiology, Algorithms, Simulation, Reoperation, musculoskeletal diseases, medicine.medical_specialty, Prosthesis-Related Infections, Biomedical Engineering, Health Informatics, X-ray, 03 medical and health sciences, Imaging, Three-Dimensional, Cadaver, medicine, Humans, Minimally Invasive Surgical Procedures, Computer Simulation, Radiology, Nuclear Medicine and imaging, Cement, business.industry, Planning Techniques, Orthopedic surgery, Surgery, Digitally reconstructed radiograph, business, Software
Abstract

Purpose: In orthopaedics, minimally invasive injection of bone cement is an established technique. We present HipRFX, a software tool for planning and guiding a cement injection procedure for stabilizing a loosening hip prosthesis. HipRFX works by analysing a pre-operative CT and intraoperative C-arm fluoroscopic images. Methods: HipRFX simulates the intraoperative fluoroscopic views that a surgeon would see on a display panel. Structures are rendered by modelling their X-ray attenuation. These are then compared to actual fluoroscopic images which allow cement volumes to be estimated. Five human cadaver legs were used to validate the software in conjunction with real percutaneous cement injection into artificially created periprothetic lesions. Results: Based on intraoperatively obtained fluoroscopic images, our software was able to estimate the cement volume that reached the pre-operatively planned targets. The actual median target lesion volume was 3.58 ml (range 3.17–4.64 ml). The median error in computed cement filling, as a percentage of target volume, was 5.3 % (range 2.2–14.8 %). Cement filling was between 17.6 and 55.4 % (median 51.8 %). Conclusions: As a proof of concept, HipRFX was capable of simulating intraoperative fluoroscopic C-arm images. Furthermore, it provided estimates of the fraction of injected cement deposited at its intended target location, as opposed to cement that leaked away. This level of knowledge is usually unavailable to the surgeon viewing a fluoroscopic image and may aid in evaluating the success of a percutaneous cement injection intervention.

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results