Results 261 to 270 of about 9,942 (285)

Endoscopic Ultrasound-Guided Fiducial Markers and Brachytherapy

Gastrointestinal Endoscopy Clinics of North America, 2012
Endoscopic ultrasound (EUS)-guided needle placement of small radiopaque particles paves the way for EUS-guided fiducial markers and brachytherapy. Stereotactic body radiation therapy relies on image-guided radiation therapy (IGRT), permitting escalation of radiation dose to tumors while minimizing dose to normal tissues. Fiducial markers are radiopaque
Zhendong, Jin, Kenneth J, Chang
openaire   +2 more sources

Fiducial Marker Placement for Intraoperative Spine Localization

Journal of Vascular and Interventional Radiology, 2011
In recent years, there has been a great increase in the number of cases of image-guided fiducial marker placement for the purposes of stereotactic radiosurgery. At the authors' parent institution, a tertiary referral academic medical center, the placement of fiducial markers has also been used for the purposes of localization before spine surgery ...
Daniel A, Marichal, David W, Barnett, James D, Meler, Kennith F, Layton   +3 more
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MarkerDetector: A method for robust fiducial marker detection in electron micrographs using wavelet-based template

Journal of Structural Biology
Fiducial marker detection in electron micrographs becomes an important and challenging task with the development of large-field electron microscopy. The fiducial marker detection plays an important role in several steps during the process of electron ...
Zhidong Yang, José-Jesús Fernández, Fa Zhang   +2 more
exaly   +2 more sources

Fiducial Markers for Image Guided Partial Breast Irradiation

International Journal of Radiation Oncology*Biology*Physics, 2012
This study was undertaken to study the role of fiducial markers for image-guided partial breast irradiation (IG-PBI), and to compare the shifts based on bony anatomy and fiducial markers.Fifteen patients underwent IGPBI. Three fiducial markers were placed in the tumour bed at the time of surgery.
Marco, Trovo, Jerry, Polesel, Cristina, Biasutti, Giovanna, Sartor, Mario, Roncadin, Gaetano Mauro, Trovo   +5 more
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Augmented reality without fiducial markers

2015 20th Symposium on Signal Processing, Images and Computer Vision (STSIVA), 2015
This work presents an implementation of an augmented reality system that does not use fiducial markers for neither estimating the camera pose nor inserting a virtual object but natural marks such as corners of objects that are present in the scene. The system uses a RGB-D dataset for positioning the camera which moves with 6 DOF, for defining a work ...
Andres Diaz, Sebastian Caicedo, Eduardo Caicedo   +2 more
openaire   +1 more source

Optimization Model for the Distribution of Fiducial Markers in Liver Intervention

Journal of Medical Systems, 2020
The distribution of fiducial markers is one of the main factors affected the accuracy of optical navigation system. However, many studies have been focused on improving the fiducial registration accuracy or the target registration accuracy, but few solutions involve optimization model for the distribution of fiducial markers.
Qinyong Lin, Rongqian Yang, Lin Yang, Huazhou Chen, Bohan Li 0001, Ken Cai   +5 more
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Fiducial Markers for Pose Estimation.

J. Intell. Robotic Syst., 2021
Michail Kalaitzakis, Brennan Cain, Sabrina Carroll, Anand Ambrosi, Camden Whitehead, Nikolaos I. Vitzilaios   +5 more
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Classification of Fiducial Markers in Challenging Conditions with SVM

2017
Square fiducial markers are a popular tool for camera pose estimation because of their high robustness and performance. However, state-of-the-art methods perform poorly under difficult image conditions, such as camera defocus, motion blur, small scale or non-uniform lighting. This paper tackles the marker identification problem as a classification one,
Víctor Manuel Mondéjar-Guerra, Sergio Garrido-Jurado, Rafael Muñoz-Salinas, Manuel J. Marín-Jiménez, Rafael Medina Carnicer   +4 more
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Using dynamic programming to improve fiducial marker localization

Physics in Medicine and Biology, 2014
Fiducial markers are used in a wide range of medical imaging applications. In radiation therapy, they are often implanted near tumors and used as motion surrogates that are tracked with fluoroscopy. We propose a novel and robust method based on dynamic programming (DP) for retrospectively localizing radiopaque fiducial markers in fluoroscopic images ...
Hanlin, Wan, Jiajia, Ge, Parag, Parikh
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On The Visibility Of Fiducial Markers For Mobile Eye Tracking

2023 Symposium on Eye Tracking Research and Applications, 2023
Naila Ayala, Diako Mardanbegi, Andrew T. Duchowski, Ewa Niechwiej-Szwedo, Shi Cao, Suzanne K. Kearns, Elizabeth L. Irving   +6 more
openaire   +1 more source