Results 21 to 30 of about 9,942 (285)
Physics and Imaging in Radiation Oncology, 2023 Background and purpose: In real-time lung tumor-tracking stereotactic body radiotherapy (SBRT), tracking accuracy is related to radiotherapy efficacy. This study aimed to evaluate the respiratory movement relationship between a lung tumor and a fiducial ...
Yoshinori Tanabe +4 more
doaj +1 more source
Planar fiducial markers: a comparative study
Virtual Reality, 2023 Fiducial markers are a cost-effective solution for solving labeling and monocular localization problems, making them valuable tools for Augmented Reality (AR), robot navigation, and 3D modeling applications. However, with the development of many marker detection systems in the last decade, it has become challenging for new users to determine which is ...
David Jurado-Rodríguez +3 more
openaire +2 more sources
Design, Detection, and Tracking of Customized Fiducial Markers [PDF]
IEEE Access, 2021 Fiducial markers such as QR codes, ArUco, and AprilTag have become very popular tools for labeling and camera positioning. They are robust and easy to detect, even in devices with low computing power. However, their industrial appearance deters their use in scenarios where an attractive and visually appealing look is required.
David Jurado-Rodríguez +3 more
openaire +2 more sources
STag: A stable fiducial marker system [PDF]
Image and Vision Computing, 2019 Fiducial markers provide better-defined features than the ones naturally available in the scene. For this reason, they are widely utilized in computer vision applications where reliable pose estimation is required. Factors such as imaging noise and subtle changes in illumination induce jitter on the estimated pose.
Burak Benligiray +2 more
openaire +2 more sources
, 2022 DICOM CT images of fiducial marker ( ball- and straight- shaped Gold Anchor , ACCUROC)
Nemoto, H
core +2 more sources
Physics and Imaging in Radiation Oncology, 2022 Background and purpose: The low tracking accuracy of lung stereotactic body radiotherapy (SBRT) risks reduced treatment efficacy. We used four-dimensional computed tomography (4DCT) images to determine the correlation between changes in fiducial marker ...
Yoshinori Tanabe, Hidekazu Tanaka
doaj +1 more source
Fiducial Objects: Custom Design and Evaluation
Sensors, 2023 Camera pose estimation is vital in fields like robotics, medical imaging, and augmented reality. Fiducial markers, specifically ArUco and Apriltag, are preferred for their efficiency.
Pablo García-Ruiz +4 more
doaj +1 more source
Efficacy and safety of ultrasound-guided implantation of fiducial markers in the liver for stereotactic body radiation therapy. [PDF]
PLoS ONE, 2017 Stereotactic body radiation therapy (SBRT) for the treatment of a malignancy in the liver requires the perilesional implantation of fiducial markers for lesion detection. The purpose of this study is to evaluate the efficacy and safety of ultrasound (US)
So Hyun Park +7 more
doaj +1 more source
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 +2 more
doaj +1 more source
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 +2 more
openaire +3 more sources