scholarly journals Extending MITK by a real-time online video overlay navigation system for minimally invasive surgery

2010 ◽  
Author(s):  
Matthias Keil ◽  
Matthias Noll
Keyword(s):  
Minimally Invasive Surgery ◽  
Real Time ◽  
Navigation System ◽  
Tumor Model ◽  
Computer Assisted Surgery ◽  
Computer Assisted ◽  
Online Video ◽  
Electromagnetic Tracking ◽  
Position And Orientation

The purpose of this paper is to present our extension of the MITK toolkit by a real-time navigation system for computer assisted surgery. The system was developed with laparoscopic partial nephrectomies as a first application scenario. The main goal of the application is to enable tracking of the tumor position and orientation during surgery. Our system is based on ultrasound to CT registration and electromagnetic tracking. The basic idea is to process tracking information to generate an augmented reality (AR) visualization of a tumor model in the camera image of a laparoscopic camera. Our system will enhance the surgeon’s view on the current scene and therefore facilitates higher safety during the surgery. A key intention of the development was to use only open source toolkits such as VTK, MITK and OpenCV in order to implement the desired functionality. So far we have applied our system in vitro in two phantom trials with a surgeon which yielded promising results.

A System for Visualizing and Assessing Electromagnetic Tracking Error during Computer-­‐assisted Surgery

2018 ◽  
Author(s):  
Vinyas Harish
Keyword(s):  
Open Source ◽  
Real Time ◽  
Random Noise ◽  
Tracking Error ◽  
Computer Assisted Surgery ◽  
Ground Truth ◽  
Optical Tracking ◽  
Computer Assisted ◽  
Electromagnetic Tracking ◽  
Surgical Equipment

PURPOSE: Electromagnetic tracking is used in image-­‐guided interventions to monitor the position of surgical equipment. However, it is prone to error. During navigation procedures, the measurement and visualization of error should take place to ensure precision and accuracy. Our goal was to extend open-­‐source software such that no programming from the user is needed for error monitoring.   METHODS: The electromagnetic tracking error was defined as the difference in position readings of a surgical stylus that was optically and electromagnetically tracked. The optical tracking reading was considered ground truth as it is unaffected by metal objects. The stylus was moved freehandedly within a region of interest to quickly sample electromagnetic tracking error, including error caused by field-­‐distortion inducing ferromagnetic materials and random noise. All tracked devices were used in a plug-­‐and-­‐play manner. Measurements were visualized in real-­‐time in 3D Slicer, an open-­‐ source platform for medical image computing (www.slicer.org).   RESULTS: To determine the reproducibility of the data collected by our system, the tracking error was measured in regions of interest representing a surgeon’s workspace. Tests were done with and without metal objects placed in the workspace. A quick freehand sampling procedure was sufficient to detect error. Freehand measurements within a controlled environment reported distortion values of 1.16 mm (STD 0.71 mm). Measurements taken with a metal rod and parts from a surgical retractor kit were 4.27 mm (STD 2.92 mm) and 8.26 mm (STD 2.08 mm), respectively.   CONCLUSION: Our system shows promise for the real-­‐time visualization of electromagnetic tracking error during computer-­‐assisted surgical procedures

Comparative repeatability of guide-pin axis positioning in computer-assisted and manual femoral head resurfacing arthroplasty

2007 ◽  
Vol 221 (7) ◽  
pp. 713-724 ◽  
Author(s):  
A Hodgson ◽  
N Helmy ◽  
B A Masri ◽  
N V Greidanus ◽  
K B Inkpen ◽  
...  
Keyword(s):  
Femoral Head ◽  
Computer Assisted Surgery ◽  
Hip Resurfacing ◽  
Computer Assisted ◽  
Comparable Amount ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Surgeon Experience ◽  
Position And Orientation ◽  
Version Measurement

The orientation of the femoral component in hip resurfacing arthroplasty affects the likelihood of loosening and fracture. Computer-assisted surgery has been shown to improve significantly the surgeon's ability to achieve a desired position and orientation; nevertheless, both bias and variability in positioning remain and can potentially be improved. The authors recently developed a computer-assisted surgical (CAS) technique to guide the placement of the pin used in femoral head resurfacing arthroplasty and showed that it produced significantly less variation than a typical manual technique in varus/valgus placement relative to a pre-operatively determined surgical plan while taking a comparable amount of time. In the present study, the repeatability of both the CAS and manual techniques is evaluated in order to estimate the relative contributions to overall variability of surgical technique (CAS versus manual), surgeon experience (novice versus experienced), and other sources of variability (e.g. across specimens and across surgeons). This will enable further improvements in the accuracy of CAS techniques. Three residents/fellows new to femoral head resurfacing and three experienced hip arthroplasty surgeons performed 20-30 repetitions of each of the CAS and manual techniques on at least one of four cadaveric femur specimens. The CAS system had markedly better repeatability (1.2°) in varus/valgus placement relative to the manual technique (2.8°), slightly worse repeatability in version (4.4° versus 3.2°), markedly better repeatability in mid-neck placement (0.7 mm versus 2.5 mm), no significant dependence on surgeon skill level (in contrast to the manual technique), and took significantly less time (50 s versus 123 s). Proposed improvements to the version measurement process showed potential for reducing the standard deviation by almost two thirds. This study supports the use of CAS for femoral head resurfacing as it is quicker than the manual technique, independent of surgeon experience, and demonstrates improved repeatability.

Real-Time Image-Guided Navigation in the Management of Alveolar Cleft Repair

2021 ◽  
pp. 105566562110577
Author(s):  
Yuying Zhang ◽  
Jiawei Dai ◽  
Xiazhou Fu ◽  
Jiegang Yang ◽  
Yuchuan Fu ◽  
...  
Keyword(s):  
Real Time ◽  
Navigation System ◽  
Preoperative Planning ◽  
Surgical Simulation ◽  
Surgical Navigation ◽  
Computer Assisted ◽  
Alignment Procedure ◽  
Alveolar Cleft ◽  
Image Guided ◽  
Dynamic Navigation

Objectives: To present the use of dynamic navigation system in the repair of alveolar cleft. Patients and Participants: A total of three non-syndromic patients with unilateral alveolar cleft were involved in this study. Real-time computer-aided navigation were used to achieve restoration and reconstruction with standardized surgical technique. Methods: With the individual virtual 3-dimensional (3-D) modeling based on computed tomography (CT) data, preoperative planning and surgical simulation were carried out with the navigation system. During preoperative virtual planning, the defect volume or the quantity of graft is directly assessed at the surgical region. With the use of this system, the gingival periosteum flap incision can be tracked in real-time, and the bone graft can be navigated under the guidance of the 3-D views until it matches the preoperatively planned position. Results: Three patients with alveolar cleft were successfully performed under navigation guidance. Through the model alignment procedure, accurate matches between the actual intraoperative position and the CT images were achieved within the systematic error of 0.3 mm. The grafted bone was implanted according to the preoperative plan with the aid of instrument- and probe-based navigation. All the patients were healed well without serious complications. Conclusions: These findings suggest that image-guided surgical navigation, including preoperative planning, surgical simulation, postoperative assessment, and computer-assisted navigation was feasible and yielded good clinical outcomes. Clinical relevance: This dynamic navigation could be proved to be a valuable option for this complicated surgical procedure in the management of alveolar cleft repair.

scholarly journals Computer-assisted surgery in posterior instrumentation of the cervical spine: an in-vitro feasibility study

2000 ◽  
Vol 9 (S1) ◽  
pp. S065-S070 ◽  
Author(s):  
M. Richter ◽  
L.-P. Amiot ◽  
S. Neller ◽  
P. Kluger ◽  
W. Puhl
Keyword(s):  
Cervical Spine ◽  
Feasibility Study ◽  
Posterior Instrumentation ◽  
Computer Assisted Surgery ◽  
Computer Assisted

Detection of the hip center in computer-assisted surgery: An in vitro assessment study

IRBM ◽  
2013 ◽  
Vol 34 (4-5) ◽  
pp. 319-321 ◽  
Author(s):  
Z. Dib ◽  
G. Dardenne ◽  
N. Poirier ◽  
P.-Y. Huet ◽  
C. Lefevre ◽  
...  
Keyword(s):  
Computer Assisted Surgery ◽  
Computer Assisted ◽  
Assessment Study ◽  
In Vitro Assessment
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