Results 161 to 170 of about 30,575 (187)
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Intra-prostatic Fiducial Markers and Concurrent Androgen Deprivation
Clinical Oncology, 2005To document the case of a man with adenocarcinoma of the prostate treated with external beam radiotherapy and concurrent androgen deprivation.The man, who received 79.8 Gy in 42 fractions of radiotherapy over 8.5 weeks using three intra-prostatic gold fiducial markers for on-line set-up correction, started an anti-androgen 2.5 weeks before radiotherapy,
A M, Nichol +4 more
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Edible fiducial marker made of edible retroreflector
Computers & Graphics, 2018Abstract In Augmented Reality (AR) and Mixed Reality (MR), it is important to measure the position and orientation of objects in the real world. However, there were many difficulties in recognizing objects from images along, especially considering real-time processing.
Hiromasa Oku +3 more
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Transarterial Fiducial Marker Placement: A Novel Technique
Journal of Vascular and Interventional Radiology, 2013skin with an indelible skin marker. A 7-cm, 21-gauge micropuncture needle (Micropuncture Introducer Set; Cook, Inc, Bloomington, Indiana) was placed longitudinally over the patient’s anterior thigh with the tip of the needle approximately 5 mm cephalad to the planned venous puncture site, and a site 15 mm cephalad to the needle hub was marked on the ...
Shamar Young +3 more
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PET Motion Tracking with Radioactive Fiducial Markers
2006 IEEE Nuclear Science Symposium Conference Record, 2006Anesthetics used to keep small animals motionless during PET studies are a major confounding factor in the uptake and retention of radiotracers, particularly in the brain. This study proposes the use of radioactive fiducial markers to track and recover motion using only data from the PET scanner allowing anaesthetized imaging.
Christopher A. Cardi, Paul D. Acton
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High-accuracy fiducial markers for ground truth
2016 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2016This paper introduces a fiducial marker which favours accuracy over run-time performance. Its intended use is for creating ground truth for outdoor SLAM in GPS-denied environments. Rather than using only corners or edges for pose estimation, the marker has a radial sinusoid pattern which has a predictable appearance under perspective projection.
Matthew J. Edwards +2 more
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The Geometry of Colorful, Lenticular Fiducial Markers
2015 International Conference on 3D Vision, 2015Understanding the pose of an object is fundamental to a variety of visual tasks, from trajectory estimation of UAVs to object tracking for augmented reality. Fiducial markers are visual targets designed to simplify this process by being easy to detect, recognize, and track. They are often based on features that are partially invariant to lighting, pose
Ian Schillebeeckx +3 more
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Fiducial Marker Implantation in Prostate Radiation Therapy
2017Over the last decade, the simultaneous application of intensity-modulated radiotherapy (IMRT) and image-guided radiotherapy (IGRT) conformal techniques to the treatment of prostate cancer has made it possible to deliver extremely high doses of radiation to the cancer while to a large extent sparing critical organs like the rectum and bladder.
Andrea Benedetto Galosi +3 more
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Vision-Based Localization Using Reliable Fiducial Markers
2012Vision-based positioning systems are founded primarily on a simple image processing technique of identifying various visually significant key-points in an image and relating them to a known coordinate system in a scene. Fiducial markers are used as a means of providing the scene with a number of specific key-points, or features, such that computer ...
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