Patent Number: 6,294,789

Title: Radiation intensifying screen

Abstract: A radiation intensifying screen is formed by a reflective-transmissive layer which is disposed between two radiation absorbing, luminescent phosphor layers having emission maximum wavelengths which are well separated. The reflective-transmissive layer is either a long wave pass or short wave pass filter which provides maximum reflection for spectral emissions produced in the first luminescent layer but, at the same time, allows the maximum transmission of spectral emissions produced in the second luminescent layer. An optional secondary reflective layer and a backing layer are provided adjacent to the second luminescent layer. As a result, spectral emissions in the first luminescent layer have a relatively short traveling path compared to the path in a conventional intensifying screen. The disclosed dual layer intensifying screen construction increases the spatial resolution of the phosphor screen without adversely affecting the screen speed.

Inventors: Jing; Zhenxue (Danbury, CT)

Assignee: Hologic, Inc.

International Classification: G21K 4/00 (20060101); G21K 004/00 ()

Expiration Date: 09/25/2018