A need to develop environmentally friendly technologies to retrieve precious metals has arisen due to the current mining methods which involve the use of harsh chemicals that endanger the communitys health. Alfalfa biomass has shown in previously performed experiments that it has a substantial ability to bind gold(III) from aqueous solutions in a rapid and… (More)
A compact and low-cost detection electronics scheme for optical coherence imaging is demonstrated. The performance of the designed electronics is analyzed in comparison to a commercial lock-in amplifier of equal bandwidth. Images of a fresh-onion sample are presented for each detection configuration.
As members of the Dissertation Committee, we certify that we have read the dis-sertation prepared by Vaibhav Joga Singh Bora entitled Photon Statistics in Scin-tillation Crystals and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy. Final approval and acceptance of this dissertation is… (More)
As members of the Dissertation Committee, we certify that we have read the disser-tation prepared by Helen Xiang Fan entitled Lens-coupled X-Ray Imaging Systems and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy. Final approval and acceptance of this dissertation is contingent upon the… (More)
We are exploring the concept of adaptive multimodality imaging, a form of non-linear optimization where the imaging configuration is automatically adjusted in response to the object. Preliminary studies suggest that substantial improvement in objective, task-based measures of image quality can result. We describe here our work to add motorized adjustment… (More)
Adaptive imaging systems alter their data-acquisition configuration or protocol in response to the image information received. An adaptive pinhole single-photon emission computed tomography (SPECT) system might acquire an initial scout image to obtain preliminary information about the radiotracer distribution and then adjust the configuration or sizes of… (More)
In this paper, we consider a prototype of an adaptive SPECT system, and we use simulation to objectively assess the system's performance with respect to a conventional, non-adaptive SPECT system. Objective performance assessment is investigated for a clinically relevant task: the detection of tumor necrosis at a known location and in a random lumpy… (More)