Pixel detectors become an integral part of medical imaging, nondestructive testing, space science and particle physics. Sensors that are bump bonded to readout ASICs made from various materials such as GaAs, Si, CdTe, CdZnTe. Current research tends use CdTe/CdZnTe gamma-ray sensors due its high absorption coefficient in the gamma spectrum. With decreasing size pixel pitch, charge diffusion seco...

We have proposed the CoMPACT monitor; it achieves the scalable measurement of the one-way delay distribution for each flow. CoMPACT monitor transforms the one-way delay data obtained by active measurement by using the passively monitored traffic data of the target flow. A recent study reported that using an inter-probe time with Gamma distribution can improve the accuracy of simple active measu...

This study presents the comparison of the cumulative distribution of tropospheric scintillation models in order to see which model suits the best with the measured one. About six different models were compared and studied with the measured one. The scintillation data were taken from January 2011 till December 2011 which totals up to a 12 month period. This paper also presents the percentage fra...

Gallium-67 images have generally suffered from poor quality because of difficulty in properly collimating the multiple photopeaks released by the radionuclide. A comparison of the spatial resolution and septal penetration characteristics of two collimators we currently use for Ga-67 imaging-with a scintillation camera system equipped with single photopeak analyzersis presented. Results show tha...

Two types of distortions are produced by the gamma camera. One is nonuniform sensitivity re sponse over the detecting area. The second is spatial distortion; that is, the displacement from their true positions of the xand y-coordinates of a scintilla tion. This component of camera image distortion arises in the resolution and transfer of the xand y-coordinates of a scintillation and results in ...

Characterization of temperature and thermal transport properties of the skin can yield important information of relevance to both clinical medicine and basic research in skin physiology. Here we introduce an ultrathin, compliant skin-like, or 'epidermal', photonic device that combines colorimetric temperature indicators with wireless stretchable electronics for thermal measurements when softly ...

An on-axis, vibration insensitive, polarization Fizeau interferometer is realized through the use of a pixelated polarization mask spatial carrier phase shifting technique in conjunction with a high coherence source and a polarization frequency shift device. In this arrangement, differential motion between the test and reference surfaces, in conjunction with the polarization frequency shift dev...

Gamma-ray detectors based on bright monolithic scintillation crystals coupled to pixelated photodetectors are currently being considered for several applications in the medical imaging field. In a typical monolithic detector, both the light intensity and the time of arrival of the earliest scintillation photons can be recorded by each of the photosensor pixels every time a gamma interaction occ...

We present a linear Stokes polarization camera working at visible wavelength. The camera is both compact and robust for use in field experiments and outdoor conditions. It is based on fast polarization modulator. Four polarization states images are acquired successively. Processing software allows live calculation, visualization and measurement of polarization images deduced from the acquired i...