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Airborne contaminants, e.g., bacterial spores, are usually analyzed by time-consuming microscopic, chemical, and biological assays. Current research into real-time laser spectroscopic detectors of such contaminants is based on e.g., resonance fluorescence. The present approach derives from recent experiments in which atoms and molecules are prepared by one(More)
We show that gain-swept superradiance can be used to detect low (parts per million) concentrations of various gases at distances on the order of kilometers, which is done by using pulse timing to create small regions of gain at positions that sweep toward a detector. The technique is far more sensitive than previous methods such as light detection and(More)
We realize vibrational photoacoustic microscopy (VPA) using molecular excitation of overtone vibration and acoustic detection of the resultant pressure transients. We demonstrate 3-D VPA imaging of lipid-rich atherosclerotic plaques and lipid bodies in living Drosophila larvae by exciting 2<sup>nd</sup> overtone of the CH bond stretch around 8300(More)
The aim of this study was to develop and implement an algorithm for the co-registration of 3D breast MRI sets acquired at two slightly different patient positions (repetitive examination). Combined translation and rotation with locally varying parameters were applied for the purpose of coordinate transformation. A phantom allowing selective changes of the(More)
  • Jeffrey D. Hamerlinck, Robert Lucht, Louise Cordova, Chris Arneson
  • 2002
Contents of this publication have been reviewed only for editorial and grammatical correctness, not for technical accuracy. The material presented herein resulted from research sponsored by U.S. Environmental Protection Agency and the Wyoming Department of Environmental Quality, Water Quality Division, through the Wyoming Water Resources Center, however(More)
We demonstrate a new method for measuring translational temperatures using degenerate four-wave mixing (DFWM). We perform high-resolution measurements of DFWM spectra in both the forward (BoxCARS) and backward (phase-conjugate) phase-matching geometries on nitric oxide (NO) in a room-temperature gas cell. We analyze the spectra with a modified perturbation(More)
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