Innovative High Resolution Dental X-ray Imager

Period of Performance: 08/01/2016 - 02/28/2017


Phase 1 SBIR

Recipient Firm

Radiation Monitoring Devices, Inc.
44 Hunt Street Array
Watertown, MA 02472
Principal Investigator


Abstract Radiation Monitoring Devices (RMD) proposes to develop a new dental x-ray imager that willhave all the advantages of a digital technology, retain the most desirable aspects of image qualitythat film emulsions provide, and most importantly, reduce dose to patients. The device will be ablend of two technologies ? silicon based imaging arrays and semiconductor x-ray conversionlayers. The silicon capabilities are better understood, with CCD and CMOS devices wellestablished in dental imaging. The application of a semiconductor conversion layer is the morechallenging aspect, but advances being made in related medical fields (such as mammography)demonstrate the potential for extraordinary quality images. RMD wants to bring a similar technological revolution to dental imaging. The variation tothe above referenced technology is to replace the current x-ray receptor (selenium) with adifferent semiconductor layer ? mercuric iodide (HgI2) ? that will provide greater dose efficiencyand higher image contrast. Instead of a-Si TFT arrays, a CMOS passive pixel array will be adaptedfor the HgI2 converter layer. The advantage to dental imaging is that dentists will get the highresolution images that they are accustomed to with film, but now with a much lower dose to thepatient. RMD will work on tailoring mercuric iodide detection layers to a high resolution CMOSdevice. The work plan will encompass making a variety of test devices and fully evaluating theirphysical, electrical and imaging characteristics. At the end of Phase 1, it is desired to havedemonstrated a device with exceptional image potential quality that is better than conventionaldigital technology with phosphors and scintillators. And because of the key direct convertertechnology, the dose per image will be vastly reduced from current norms.