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Displaying raw MEG measurements with FreeSurfer

Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC 2006 (2006) 59-60

Authors:

SM Rugheimer, Q Liu, RJ Sclabassi, M Sun

Abstract:

Magnetoencephalography (MEG) is a non-invasive technique of functional imaging which measures weak magnetic fields in the brain due to the currents generated from neural synapses. MEG systems contain a couple of hundred channels, making it difficult to visualize the raw measurements directly. As an alternative to rendering epileptic data, we demonstrate how MEG measurements can be mapped to a cortical surface by using a software package called FreeSurfer. We fuse MEG data with Magnetic Resonance Image (MRI) by plotting the MEG amplitude on top of the MRI images of gray matter surface. In addition to the surface, we render the MEG intensity in the convoluted regions, e.g. sulci, by computationally "inflating" the brain. These techniques are utilized for experimental study currently, and can be extended for diagnostic purposes in the future. © 2006 IEEE.

Design of the KMOS multi-object integral field spectrograph - art. no. 62691C

P SOC PHOTO-OPT INS 6269 (2006) C2691-C2691

Authors:

R Sharples, R Bender, R Bennett, K Burch, P Carter, M Casali, P Clark, R Content, R Davies, R Davies, M Dubbeldam, G Finger, R Genzel, R Haefner, A Hess, M Kissler-Patig, K Laidlaw, M Lehnert, I Lewis, A Moorwood, B Muschielok, NF Schreiber, J Pirard, SR Howat, P Rees, J Richter, D Robertson, I Robson, R Saglia, M Tecza, N Thatte, S Todd, M Wegner

Abstract:

KMOS is a near-infrared multi-object integral field spectrometer which has been selected as one of a suite of second-generation instruments to be constructed for the ESO VLT in Chile. The instrument will be built by a consortium of UK and German institutes working in partnership with ESO and is currently at the end of its preliminary design phase. We present the design status of KMOS and discuss the most novel technical aspects and the compliance with the technical specification.
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Improved near-infrared methane band models and k-distribution parameters from 2000 to 9500 cm-1 and implications for interpretation of outer planet spectra

Icarus 181 (2006) 309-319

Authors:

PG Irwin, L.A. Sromovsky, E.K. Strong, K. Sihra
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Jupiter-sized planets in the Solar System and elsewhere

Chapter in Solar system update, Springer Verlag (2006)
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Opto-mechanical design of the KMOS spectrograph module - art. no. 62694G

P SOC PHOTO-OPT INS 6269 (2006) G2694-G2694

Authors:

M Tecza, IJ Lewis, J Lynn, S Yang, NA Thatte, IAJ Tosh, MJ Ferlet

Abstract:

We present the optical and mechanical design of the KMOS spectrograph module together with a detailed analysis of its performance. KMOS is a cryogenic near-infrared multi-object spectrograph being developed as a second-generation instrument for the VLT by a consortium of UK and German institutes. Three identical spectrograph modules provide Nyquist sampled spectra in the wavelength range covering the atmospheric bands z, J, H, and K with a resolving power exceeding 3200. The spectrographs are fully achromatic over the bands and the single mirror collimator and six-element camera, together with six high efficiency gratings provide high throughput. The optical performance analysis includes amongst others the spectral resolving power and variation of the PSF as a function of the pupil illumination.
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