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Technical requirements for Na¹⁸F PET bone imaging of patients being treated using a Taylor spatial frame.
J Nucl Med Technol
March 2014
Department of Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden.
Unlabelled: Diagnosis of new bone growth in patients with compound tibia fractures or deformities treated using a Taylor spatial frame is difficult with conventional radiography because the frame obstructs the images and creates artifacts. The use of Na(18)F PET studies may help to eliminate this difficulty.
Methods: Patients were positioned on the pallet of a clinical PET/CT scanner and made as comfortable as possible with their legs immobilized.
Dynamic topographical pattern classification of multichannel prefrontal NIRS signals: II. Online differentiation of mental arithmetic and rest.
J Neural Eng
February 2014
Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, Ontario, Canada. Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada.
Objective: Near-infrared spectroscopy (NIRS) has recently gained attention as a modality for brain-computer interfaces (BCIs), which may serve as an alternative access pathway for individuals with severe motor impairments. For NIRS-BCIs to be used as a real communication pathway, reliable online operation must be achieved. Yet, only a limited number of studies have been conducted online to date.
View Article and Find Full Text PDFDynamic topographical pattern classification of multichannel prefrontal NIRS signals.
J Neural Eng
August 2013
Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, Ontario, Canada.
Objective: Near-infrared spectroscopy (NIRS) is an optical imaging technique that has recently been considered for brain-computer interface (BCI) applications. To date, NIRS-BCI studies have primarily made use of temporal features of brain activity, derived from the time-course of optical signals measured from discrete locations, to differentiate mental states. However, functional brain imaging studies have indicated that the spatial distribution of haemodynamic activity is also rich in information.
View Article and Find Full Text PDF[System changes in the cortical electrical activity and their role in integrative processes in the brain (a synergic approach)].
Usp Fiziol Nauk
September 2001
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
In the paper, the general theory of systems is applied to a description of the spatio-temporal organization of the summary cortical potentials, synergetic approach is applied for the insight into the functioning of their system changes. This made it possible to consider the human and animal cortical potentials recorded under different experimental conditions from the single viewpoint. The system organization of cortical potentials in multiple derivations was revealed by comparison of momentary topograms (a sequence of momentary values of cortical potentials in all recording points).
View Article and Find Full Text PDF[Relations between two types of the spatial-temporal organization of the human brain potentials during formation and actualization of set to a visual nonverbal stimulus].
Zh Vyssh Nerv Deiat Im I P Pavlova
February 2001
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
The functional state of the brain cortex estimated by the dynamic changes in the global spatio-temporal organization of brain potentials (STOP) was studied at different stages of the cognitive set formed on the basis of the image of two circles of different diameter. Thirty five subjects (predominantly, right-handed) were examined. The method of quantitative estimation of successive topograms was used for the analysis of the STOP.
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