OBJECTIVETo develop a new method of direct digital image acquisition for extra-oral radiography.METHODSA selenium detector was combined with a thin-film transistor sensor and integrated with current technology for computed radiography in a system named Direct Radiography (DR). The effective image area of the prototype is 178 mm x 213.5 mm, and consists of a 1280 x 1536 pixel matrix with a pixel pitch of 139 microns x 139 microns. The electrical characteristics were evaluated and image quality was tested with a dried human mandible and half-skull phantom. The resultant images were subjectively reviewed by seven oral and maxillofacial radiologists.RESULTSThe prototype had a signal-to-noise ratio of 400:1 when the exposure was 250 x 10(-8) C/Kg. Spatial resolution was equal to the Nyquist frequency of 3.55 cycles/mm. The images of the phantoms were considered to be of equivalent quality to conventional screen-film images and demonstrated the normal anatomical structures used for clinical evaluation. Three to four images per minute were generated with this system.CONCLUSIONThe DR system has an X-ray sensitivity comparable with a 400-speed film-screen system and appears suitable for clinical radiography. Further evaluation is therefore planned.

IS&T's Annual Conference

Imidazolium hardeners

Author: Fodor, L.

A new class of peptide coupler type crosslinking agents are described.The representatives of the new hardener class are fast hardeners without the adverse effect of low stability.A hardening pathway is also proposed.The hardening pace and the dependence of hardening with pH is described.

Proceedings of SPIE-The International Society for Optical Engineering

Radiographic imaging characteristics of a direct conversion detector using selenium and thin film transistor array

Author: Cheung, Lawrence K. ; Lee, Denny L. ; Palecki, Eugene F. ; Rodricks, Brian ; Jeromin, Lothar S.

Progress in the development of a semiconductor-based, direct-detection, flat-panel digital radiog. imaging device is discussed.The device consists of a 500 μm thick amorphous selenium sensor coupled to an amorphous silicon thin-film-transistor (TFT) readout matrix.This detector has an active imaging area of 14"×17", 3072×2560 pixels with dimensions 139 μm × 139 μm and a geometrical fill factor of 86 percent.Charges generated primarily as a consequence of photoelec. interaction between the incoming x-rays and Se are integrated on storage capacitors that are located at each pixel.The high elec. field applied across the Se minimizes the lateral spreading of the signal resulting in a significantly higher spatial resolution when compared to conventional film/screen systems used for general radiog.The sensor array is read out one pixel line at a time by manipulating the source and gate lines of the TFT matrix.Data are digitized to 14 bits.The statistical photon counting anal. performed on an early prototype device is discussed.Measurements included modulation transfer function, detector quantum efficiency, linearity, and noise anal.Image anal. included small contrast object visibility studies using a Faxil X-Ray Test Object T016.Advantages of this flat-panel electronic sensor over conventional systems are discussed.

100 Deals associated with Sterling Diagnostic Imaging, Inc.

100 Translational Medicine associated with Sterling Diagnostic Imaging, Inc.

Corporation Tree

Boost your research with our corporation tree data.

view full example data

Pipeline

Pipeline Snapshot as of 28 Jul 2026

No data posted

Deal

Boost your decision using our deal data.

view full example data

Translational Medicine

Boost your research with our translational medicine data.

view full example data

Profit

Explore the financial positions of over 360K organizations with Synapse.

view full example data

Grant & Funding(NIH)

Access more than 2 million grant and funding information to elevate your research journey.

view full example data

Investment

Gain insights on the latest company investments from start-ups to established corporations.

view full example data

Financing

Unearth financing trends to validate and advance investment opportunities.

view full example data

AI Agents Built for Biopharma Breakthroughs

Accelerate discovery. Empower decisions. Transform outcomes.

Get started for free today!

Accelerate Strategic R&D decision making with Synapse, PatSnap’s AI-powered Connected Innovation Intelligence Platform Built for Life Sciences Professionals.

Start your data trial now!

Synapse data is also accessible to external entities via APIs or data packages. Empower better decisions with the latest in pharmaceutical intelligence.

Bio

Bio Sequences Search & Analysis

Chemical

Chemical Structures Search & Analysis

Sterling Diagnostic Imaging, Inc.

Overview

Related

Corporation Tree

Pipeline

Pipeline Snapshot as of 28 Jul 2026

Deal

Translational Medicine

Profit

Grant & Funding(NIH)

Investment

Financing