Impregnated Semiconductor Scintillator

Scintillator distribution in high-speed autoradiography.

Durie and Salmon (1) describe the technique of impregnation ofphotographic emulsion with liquid scintillator which allows rapid autoradiographic labeling. In attempting to use this method, we found that freezing the impregnated slides without special conditions led to the formation of large ice crystals and irregularities in the frozen scintillator. They appeared even when the dioxane did not c...

Semiconductor scintillator based on photon recycling

Direct-bandgap semiconductor with high quantum radiative efficiency can operate as a scintillator despite being ‘‘opaque’’ to its own luminescence. An interband absorption does not finish off the luminescence but merely creates a new minority carrier, which in turn recombines in a predominately radiative fashion. To take full advantage of this ‘‘photon recycling’’ effect, optically-tight integr...

Evaluation of delineation of image details in semiconductor PET utilizing the normalized mutual information technique.

OBJECTIVE PET using semiconductor detectors provides high-quality images of the human brain because of its high spatial resolution. To quantitatively evaluate the delineation of image details in clinical PET images, we used normalized mutual information (NMI) to quantify the similarity with images obtained through MRI. NMI is used to evaluate image quality by determining similarity with a refer...

Semiconductor scintillator for three-dimensional array of radiation detectors

Semiconductor Scintillator for 3-Dimensional Array of Radiation Detectors

There are two large groups of solid-state radiation detectors, which dominate the area of ionizing radiation measurements, scintillation detectors and semiconductor diodes. The scintillators detect high-energy radiation through generation of light which is subsequently registered by a photo-detector that converts light into an electrical signal. Semiconductor diodes employ reverse biased p-n ju...