Brain Shift Compensation via Intraoperative Imaging and Data Assimilation

2014 ◽  
pp. 250-261
Keyword(s):  
Data Assimilation ◽  
Intraoperative Imaging ◽  
Brain Shift

A Novel Platform for Image-guided Ultrasound

Neurosurgery ◽  
2006 ◽  
Vol 58 (4) ◽  
pp. 710-718 ◽  
Author(s):  
Wuttipong Tirakotai ◽  
Dorothea Miller ◽  
Stefan Heinze ◽  
Ludwig Benes ◽  
Helmut Bertalanffy ◽  
...  
Keyword(s):  
Navigation System ◽  
Imaging Modality ◽  
Intraoperative Imaging ◽  
Intraoperative Ultrasound ◽  
Image Data ◽  
Cost Effective ◽  
Present System ◽  
Data Sets ◽  
Brain Shift ◽  
Ultrasound Device

Abstract OBJECTIVE: The combination of classic neuronavigation and intraoperative ultrasound is a recent innovation in image guidance technology. However, this technique requires two hardware components (neuronavigation and an ultrasound system). It was the aim of the study to describe a new simplified technology of a so-called one-platform navigation system developed by our institution in collaboration with the industry and to demonstrate its range of various applications. METHODS: An ultrasound device (IGSonic; BrainLAB, Munich, Germany) is integrated into the VectorVision2 navigation system (BrainLAB, Munich, Germany). The IGSonic Probe 10V5 is connected to the VectorVision Navigation station via an IGSonic Device Box. Once the ultrasound probe is calibrated, the navigated ultrasound displays the sonographic image of the intracranial anatomy on the navigation screen in a composed overlay fashion. It might depict vascular structures within the ultrasound plane by a duplex mode. Ultrasound can also be operated independently from navigation. RESULTS: The VectorVision2 system combines intraoperative ultrasound data sets with preoperatively acquired neuronavigation data sets in plug and play fashion. The system provides a cost-effective intraoperative imaging modality that offers a good anatomic orientation by various composite images, including the display of the amount of brain shift. In our institution, the comprehensible interface led to a routine use of the technology by several neurosurgeons who had not been familiar with the ultrasound technology before. CONCLUSION: The integration of an ultrasound device into an existing navigation system has been successfully developed. The system offers a friendly user interface and cost-effective intraoperative imaging feedback. Although brain shift can be visualized by an image overlay technology as demonstrated by the present system, future developments should aim at fusion techniques of both intra- and preoperative image data sets.

scholarly journals Intraoperative Imaging Modalities and Compensation for Brain Shift in Tumor Resection Surgery

2017 ◽  
Vol 2017 ◽  
pp. 1-18 ◽  
Author(s):  
Siming Bayer ◽  
Andreas Maier ◽  
Martin Ostermeier ◽  
Rebecca Fahrig
Keyword(s):  
Intraoperative Imaging ◽  
Tumor Resection ◽  
Imaging Systems ◽  
Imaging Modalities ◽  
Neurosurgical Procedures ◽  
Brain Shift ◽  
Web Tool ◽  
Modeling Methods ◽  
Image Guided ◽  
Tissue Manipulation

Intraoperative brain shift during neurosurgical procedures is a well-known phenomenon caused by gravity, tissue manipulation, tumor size, loss of cerebrospinal fluid (CSF), and use of medication. For the use of image-guided systems, this phenomenon greatly affects the accuracy of the guidance. During the last several decades, researchers have investigated how to overcome this problem. The purpose of this paper is to present a review of publications concerning different aspects of intraoperative brain shift especially in a tumor resection surgery such as intraoperative imaging systems, quantification, measurement, modeling, and registration techniques. Clinical experience of using intraoperative imaging modalities, details about registration, and modeling methods in connection with brain shift in tumor resection surgery are the focuses of this review. In total, 126 papers regarding this topic are analyzed in a comprehensive summary and are categorized according to fourteen criteria. The result of the categorization is presented in an interactive web tool. The consequences from the categorization and trends in the future are discussed at the end of this work.

Combined intraoperative magnetic resonance imaging and navigated neuroendoscopy in children with multicompartmental hydrocephalus and complex cysts: a feasibility study

2011 ◽  
Vol 8 (3) ◽  
pp. 279-288 ◽  
Author(s):  
Dimitrios Paraskevopoulos ◽  
Naresh Biyani ◽  
Shlomi Constantini ◽  
Liana Beni-Adani
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Intraoperative Imaging ◽  
Intraoperative Complications ◽  
Acquisition Time ◽  
Brain Shift ◽  
Data Set ◽  
Navigation Data ◽  
Conventional Procedure ◽  
Minimum Number

Object The rationale for using endoscopy to treat complex cysts and multiloculated hydrocephalus is to combine several CSF compartments into a minimum number, establish a connection to functioning CSF compartments (that is, ventricles), and decrease shunt dependency. The aim is to decrease the number of proximal shunt catheters, the number of shunt revisions, and in selected cases even to avoid a shunt. In cases of distorted anatomy and multiloculated cysts, endoscopy may be problematic because of orientation issues. Standard navigation becomes useless soon after CSF loss due to brain shift. Therefore, the concept of “real-time” navigation and intraoperative imaging in combination with endoscopic surgery has been previously suggested. The goal of the present study was to assess the feasibility and efficacy of combining intraoperative MR (iMR) imaging and navigated neuroendoscopy in infants. Methods The authors report their experience in treating 5 infants (aged 6–14 months), who underwent surgery for multicystic hydrocephalus presenting with shunt malfunction (4 patients) and a quadrigeminal fetal arachnoid cyst (1 patient). In all infants, a low-field portable iMR imaging system (0.12-T PoleStar N-10/0.15-Tesla PoleStar N-20) was used in conjunction with navigated endoscopy. The authors used e-steady, T1-weighted, and T2-weighted sequences (acquisition time 24 seconds to 3.5 minutes). Results The iMR imaging system provided clear images that correlated with the endoscopic appearance of the cystic membranes in all patients, and the images were helpful in determining trajectories and redefining targets. The iMR images documented brain shift and changes in CSF spaces during surgery. There were no intraoperative complications or technical difficulties of visualization. No infection or any other immediate postoperative complication occurred. Patients were followed up for 9 months to 7 years. The infant presenting with the quadrigeminal cyst remains shunt free since surgery, and the patients with multicystic hydrocephalus have 1–2 shunts each. Following endoscopic, iMR imaging–guided surgery, shunt catheter positioning was found to be optimal and as planned according to the postoperative imaging. Conclusions Navigated neuroendoscopy and iMR imaging may complement each other, offering an advantage over other modalities in complicated cases of hydrocephalus. Whenever targets and trajectories need to be redefined, the iMR images provided an updated navigation data set, allowing accurate navigation of the endoscope and minimizing the number of CSF compartments. Direct vision through the endoscope provides microanatomical details for the optimization of fenestration and catheter positioning. The combined usage of the two modalities may transform a conventional procedure into a visually controlled real-time navigated process.

Stellenwert der Navigation

2017 ◽  
Vol 01 (04) ◽  
pp. 317-334
Author(s):  
Jan-Sven Jarvers ◽  
Ulrich Spiegl ◽  
Stefan Glasmacher ◽  
Christoph Heyde ◽  
Christoph Josten
Keyword(s):  
Patient Safety ◽  
Radiation Exposure ◽  
Pedicle Screw ◽  
Spinal Surgery ◽  
Intraoperative Imaging ◽  
Intraoperative Navigation ◽  
Advantages And Disadvantages ◽  
Tumor Diseases ◽  
Intraoperative Control ◽  
Improved Technology

Abstract Importance of Navigation Navigation and intraoperative imaging have undergone an enormous development in recent years. By using intraoperative navigation, the precision of pedicle screw implantation can be increased in the sense of patient safety. Especially in the case of complex defects or tumor diseases, navigation is a decisive aid. As a result of the constantly improved technology, the requirements for reduced radiation exposure and intraoperative control can also be met. The high costs of the devices can be amortized, for example by a reduced number of revisions. This overview presents the principles of navigation in spinal surgery and the advantages and disadvantages of the different navigation procedures.

Integral Control Data Assimilation in Wave Predictions

1997 ◽  
Author(s):  
L.H. Holthuijsen ◽  
N. Booij ◽  
M. van Endt ◽  
S. Caires ◽  
C. Guedes Soares
Keyword(s):  
Data Assimilation ◽  
Control Data ◽  
Integral Control
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