Spectro-imaging

The key word in astronomy today is spectro-imaging. The combination of spectrum and image allows astronomers to deduce valuable information about objects under investigation, such as chemical composition, temperature, internal constitution and motion, or even the distance to the object. 

We have shown that with the use of CdTe arrays, it will be possible to construct compact lightweight spectro-imaging telescopes for use in hard X-ray and gamma-ray astronomy. 

Breitkreitz MC, Poppi RJ (2012) Trends in Raman chemical imaging. Biomed Spectros Imag... 

Spectroscopy is a key method of investigation for astrochemistry. It can be combined with imaging methods in so-called spectro-imaging techniques , which provide three dimensional data cubes, having as first two dimensions the position on the sky, and as third dimension a spectral axis, labelled in wavelength, frequency or velocity. 

Whilman, L.J. and Colton, R.J., Design and calibration of a scanning force microscope for friction, adhesion, and contact potential studies. Rev. Sci. fnsirum., 66, I (1995). Ba.selt, D.R. and Baldeschwieler, J.D., Imaging spectro.scopy with the atomic-force microscope. J. AppL Pliys., 76(1), 33-38 (1994). 

In the remainder of this chapter the MRI data presented are images of liquid distribution within the trickle bed. In all experiments described a Bruker Spectro-spin DMX 200 spectrometer was used, equipped with a 4.7 T magnet and a... 

A spectro-radiometer-luminometer for chemiluminescence and fluorescence quantum yield studies has been described by B. G. Roberts and H. C. Hirt 187>. To obtain emission spectra from very weak chemiluminescence reactions, a large-aperture spectrograph combined with a sensitive image-intensifier tube has been used68 this was developed from a device previously constructed by Bass and Kessler 188>. With it, it was possible to record the very weak emission of singlet oxygen dimer... 

Matthaus, C., Boydston-White, S., Miljkovic, M., Romeo, M., and Diem, M. 2006. Raman and infrared microspectral imaging of mitotic cells. Appl. Spectros. 60 1-8. 

BD, bipolar disorder GLU/GLN, glutamate/glutamine MRI, magnetic resonance imaging MRS, magnetic resonance spectros copy NC, normal control PFC, prefrontal cortex SCHZ, schizophrenia. 

Moderate Resolution Imaging Spectro-radiometer (MODIS) MODIS is a 36-channel scanning radiometer in the visible and IR ranges (0.4 pm-14.5 pm), aimed at obtaining biological and physical information about the atmosphere-land system. 

One d i sad vantage ot the iiseof randont nttisc excitation in. spectro.scopy and imaging isthe unavoidable presence of systematic noise as a consequence of the variance of the power spectral density of the excitation It is reduced but not eliminated by formation of... 

In the late 1970s, maximum entropy methods (MEM) started to be applied to the processing of images normally obtained after FT and examples were taken in the field of radio astronomy. The advantages included the reduction of sidelobes, smoother maps (less noise), and independence from phase, etc. NMR spectro-scopists also wanted to benefit from these advantages. The first NMR applications to the analysis of one-dimensional spectra were published in the 1980s in two papers by Sibisi et The first discussed the reconstruction of a two-... 

In this chapter the two Spectro-Spatial Interferometry Testbeds in which I have been involved during my programme have been presented the FIRI laboratory testbed and WIIT, the Wide-field Imaging Interferometry Testbed. Both testbeds demonstrate the theory of Double Fourier Spatio-Spectral Interferometry or the application of a Fourier-transform spectrometer (FTS) to aperture synthesis interferometry presented in the previous chapter, at far infrared wavelengths and optical wavelengths, respectively. 

In image processing, blind deconvolution is a technique used to correct blurred images when the system Point Spread Function (PSF) is unknown or poorly known. The PSF is then estimated from the image. This technique has been used for decades (Ayers and Dainty 1988 Levin et al. 2009) and in this section a blind deconvolution iterative algorithm is applied to spectro-spatial data to study its applicability. 

D. Contini, L. Zucchelli, L. Spinelli, M. Caffini, R. Re, A. Pifferi, R. Cubeddu, and A. Torricelli, Review Brain and Muscle Near Infrared Spectroscopy/ Imaging Techniques J. Near Infrared Spectros., 20,15 (2012). 

L. C. Enfield and A. P. Gibson, Review A Review of Mechanisms of Contrast for Diffuse Optical Imaging of Cancer, J. Near Infrared Spectros., 20,185 (2012). 

D. Grosenick, H. Wabnitz, and B. Ebert, Review Recent Advances in Contrast-Enhanced Near Infrared Diffuse Optical Imaging of Diseases Using Indocyanine Green, /. Near Infrared Spectros., 20, 203 (2012). 

---