Background,Motivation and Objective Osteoporosis is a musculoskeletal disease characterized by a loss of bone mass and a deterioration of trabecular bone *** the size of the aged population continues to grow in modern...
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Background,Motivation and Objective Osteoporosis is a musculoskeletal disease characterized by a loss of bone mass and a deterioration of trabecular bone *** the size of the aged population continues to grow in modern society,osteoporosis
Backscatter and attenuation parameters are not easily measured in clinical applications due to tissue inhomogeneity in the region of interest (ROI). A least squares method(LSM) that fits the echo signal power spectra ...
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Partial fraction expansion (pfe) is a classic technique used in many fields of pure or applied mathematics. The paper focuses on the pfe of general rational functions in both factorized and expanded form. Novel, simpl...
Atrial Fibrillation (AF), a chaotic rhythm classically considered with random electrical activity, is now demonstrated to show a certain degree of organization and synchronization. Rather than those traditional indice...
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ISBN:
(纸本)9781424479276
Atrial Fibrillation (AF), a chaotic rhythm classically considered with random electrical activity, is now demonstrated to show a certain degree of organization and synchronization. Rather than those traditional indices which always focus on the pairwise properties of adjacent signals, a new synchronization index-S estimator-is introduced in this paper to quantify the synchronization level for all the signals in a selected area. By evaluating a complement of the entropy of the normalized eigenvalues of the corresponding correlation matrix, S estimator is designed to be proportional to the amount of synchronization. 400 episodes of 64-channel epicardial signals acquired from four living mongrels were studied under normal sinus rhythm (SN) and AF. The results showed that there were significant decreases of S estimator for both anterior left atrium and anterior right atrium with the rhythm changing from SN to AF. After dividing the research area into eight subparts, S estimator is also capable to demonstrate the different synchronization level for each subpart and revealed the electrophysiology individual difference among four experimental subjects. In conclusion, S estimator succeeds in estimating the synchronization degree for multi-channel signals in a selected area, with no limits to the number of the signals to be analyzed. It can help us to distinguish the region with a high synchronization level during AF, which would be helpful to the clinical AF treatment and enhance our understanding of underlying mechanisms of AF.
This paper presents and implements an automatic roaming and fast virtual endoscopic neurosurgery system for transsexual approach, which can be compatible with the fiber-optic endoscopic transnasal approach in the skul...
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AIM:To address issues in interoperability between different fundus image systems,we proposed a web eyepicture archiving and communication system(PACS)framework in conformance with digital imaging and communication in ...
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AIM:To address issues in interoperability between different fundus image systems,we proposed a web eyepicture archiving and communication system(PACS)framework in conformance with digital imaging and communication in medicine(DICOM)and health level 7(HL7)protocol to realize fundus images and reports sharing and communication through ***:Firstly,a telemedicine-based eye care work flow was established based on integrating the healthcare enterprise(IHE)Eye Care technical ***,a browser/server architecture eye-PACS system was established in conformance with the web access to DICOM persistent object(WADO)protocol,which contains three ***:In any client system installed with web browser,clinicians could log in the eye-PACS to observe fundus images and *** internet mail extensions(MIME)type of a structured report is saved as pdf/html with reference link to relevant fundus image using the WADO syntax could provide enough information for *** functions provided by open-source Oviyam could be used to query,zoom,move,measure,view OICOM fundus ***:Such web eye-PACS in compliance to WADO protocol could be used to store and communicate fundus images and reports,therefore is of great significance for teleophthalmology.
Augmented Reality (AR) is a technology which is widely used in medical area, especially in surgery room. In many cases, cumbersome equipments or complicated algorithm are introduced to establish the whole system, whic...
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Augmented Reality (AR) is a technology which is widely used in medical area, especially in surgery room. In many cases, cumbersome equipments or complicated algorithm are introduced to establish the whole system, which would make it inefficient and unsuitable for surgery environment. This paper presents a convenient method for video see-through augmented reality on the basis of existing image-guided surgery system developed by our research center. We describe the prototype of the system, the registration of virtual objects in a marker coordinate system, and the motion tracking of the Head Mounted Display (HMD) using A Toolkit. Finally, we present the experiment results which show that the proposed AR technology can provide augmented information for the surgeons and work well with existing image-guided surgery system.
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