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The aim of this study was to develop a robot-assisted system for orthognathic surgery and to evaluate robot movement. The registration procedure was performed in coordinates among a robot, an optical tracking system (OTS) and a CT image with fiducials. According to the surgical plan in the CT coordinate, the robot arm moved to the corresponding robot position. The results were below 0.15mm in translational...
This paper presents K-edge filtering and energy weighting methods which enhance the contrast with less radiation does. Usually, energy weighting methods are used with photon-counting detector based CT for each energy bin data obtained to enhance the quality of image. However, we used these methods combine with K-edge filtering in energy-integrating detector. Using K-edge filtering, different energy...
Energy resolved photon-counting detectors could achieve more than one spectral measurement. The goal of this study is to investigate, with experiment, the ability to decompose five materials using energy discriminating detectors and multiple discriminant analysis (MDA). A small field-of-view multi-energy CT system was built. Linear attenuation coefficient was considered as features of multiple energy...
Familial gigantiform cementoma (FGC) is a rare autosomal dominant, benign fibro-cemento-osseous lesion of the jaws that can cause severe facial deformity. True FGC with familial history is extremely rare and there has been no literature regarding the radiological follow-up of FGC. We report a case of recurrent FGC in an Asian female child who has been under our observation for 6 years since she was...
In this study,we have developed a three-dimensional (3D) optical flow program that includes a multi-resolution feature and applied to 3D anatomic structure and gross tumor volume (GTV) contour mapping for four-dimensional computed tomography((4D CT) data. Actual 4D CT data sets from one lung cancer patient and one esophageal tumor patient,10 phases were reconstructed per respiratory cycle respectively...
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