Results 21 to 30 of about 12,897 (254)

Tracking fiducial markers with discriminative correlation filters

Image and Vision Computing, 2021
In the last few years, squared fiducial markers have become a popular and efficient tool to solve monocular localization and tracking problems at a very low cost. Nevertheless, marker detection is affected by noise and blur: small camera movements may cause image blurriness that prevents marker detection.
Francisco José Romero-Ramírez, Rafael Muñoz-Salinas, Rafael Medina Carnicer   +2 more
openaire   +3 more sources

Intracardiac Migration Following Percutaneous Computed Tomography-Guided Fiducial Marker Implantation for Pulmonary Metastasis: A Rare Complication

The Arab Journal of Interventional Radiology, 2020
A 41-year-old female with rectal cancer and lung metastasis underwent percutaneous transthoracic placement of fiducial marker. Postprocedure scan showed the migration of one of the fiducial markers to the left ventricle.
Duaa Alhindi, Yousof AbdulRahman Al Zahrani, Azzam Khankan   +2 more
doaj   +1 more source

The advantage of iron-containing fiducial markers placed with a thin needle for radiotherapy of liver cancer in terms of visualization on MRI: an initial experience of Gold Anchor

Radiology Case Reports, 2017
Radiotherapy for liver malignancy is increasing due to advances in radiotherapy technique. Visualization of the tumor as well as fiducial markers is essential.
Osamu Tanaka, MD, Yoichi Nishigaki, MD, Hideki Hayashi, MD, Takayoshi Iida, MD, Takamasa Yokoyama, RT, Eiji Takenaka, RT, Eiichi Yama, RT, Eiichi Tomita, MD   +7 more
doaj   +1 more source

Qualitative Evaluation of Fiducial Markers for Radiotherapy Imaging [PDF]

Technology in Cancer Research & Treatment, 2014
Purpose: To evaluate visibility, artifacts, and distortions of various commercial markers in magnetic resonance imaging (MRI), computer tomography (CT), and ultrasound imaging used for radiotherapy planning and treatment guidance. Methods:
Maria F, Chan, Gil'ad N, Cohen, Joseph O, Deasy   +2 more
openaire   +2 more sources

Sonographic-guided percutaneous fiducial marker implantation of hepatic malignancies for Cyberknife radiation therapy: Evaluation of safety and technical efficacy

Journal of Medical Sciences, 2015
Background: CyberKnife radiation therapy has a widely used system in the treatment of extracranial lesions. Implanting gold fiducial markers around a tumor is an important procedure for the planning and aiming of CyberKnife radiation therapy.
Chang-Hsien Liu, Chih-Yung Yu, Te-Pao Lin, Hsing-Lung Chao, Hsiang-Cheng Chen, Cheng-Chung Cheng   +5 more
doaj   +1 more source

Analysis on Four Derivative Waveforms of Photoplethysmogram (PPG) for Fiducial Point Detection

Frontiers in Public Health, 2022
Fiducial points of photoplethysmogram (PPG), first derivative PPG (VPG), and second derivative PPG (APG) are essential in extracting numerous parameters to diagnose cardiovascular disease.
Mohd Zubir Suboh, Mohd Zubir Suboh, Rosmina Jaafar, Nazrul Anuar Nayan, Noor Hasmiza Harun, Mohd Shawal Faizal Mohamad   +5 more
doaj   +1 more source

TagSLAM: Robust SLAM with Fiducial Markers

CoRR, 2019
TagSLAM provides a convenient, flexible, and robust way of performing Simultaneous Localization and Mapping (SLAM) with AprilTag fiducial markers. By leveraging a few simple abstractions (bodies, tags, cameras), TagSLAM provides a front end to the GTSAM factor graph optimizer that makes it possible to rapidly design a range of experiments that are ...
Bernd Pfrommer, Kostas Daniilidis
openaire   +2 more sources

Computed tomography based evaluation of prostatic fiducial marker migration between the periods of insertion and simulation

Urology Research and Practice, 2019
Objective: The aim of this study was to determine whether significant fiducial marker migration occurs between the periods of prostatic marker insertion and computed tomography (CT) performed for radiotherapy planning and if a waiting period is necessary.
Taner Arpacı, Gamze Uğurluer, Emine Burçin İspir, Alper Eken, Tuğana Akbaş, Meltem Serin   +5 more
doaj   +1 more source

Optimization of a newly defined target volume in fiducial marker-based dynamic tumor-tracking radiotherapy

Physics and Imaging in Radiation Oncology, 2017
Background and purpose: To optimize the selection of fiducial markers used to determine the “internal target volume for tracking” (ITVtracking) for fiducial marker-based dynamic tumor-tracking (DTT) radiotherapy for lung tumors, with four-dimensional 320-
Yusuke Iizuka, Yukinori Matsuo, Mitsuhiro Nakamura, Satoshi Kozawa, Nami Ueki, Takamasa Mitsuyoshi, Takashi Mizowaki, Masahiro Hiraoka   +7 more
doaj   +1 more source

A Skin-Conformal, Stretchable, and Breathable Fiducial Marker Patch for Surgical Navigation Systems

Micromachines, 2020
Augmented reality (AR) surgical navigation systems have attracted considerable attention as they assist medical professionals in visualizing the location of ailments within the human body that are not readily seen with the naked eye.
Sangkyu Lee, Duhwan Seong, Jiyong Yoon, Sungjun Lee, Hyoung Won Baac, Deukhee Lee, Donghee Son   +6 more
doaj   +1 more source