Scintillating Fiber Dosimeter for Magnetic Resonance Imaging Enviroment

摘要

An x-ray detector for use in the presence of magnetic resonance imaging equipment provides a two-stage transmission path of optical fiber followed by a non-ferromagnetic shielded cable to displace measurement electronics outside of the concentrated magnetic and radiofrequency fields of the MRI device. Conversion from light to an electrical signal for this transmission path is provided by circuitry held in a non-ferromagnetic Faraday cage. In this way accurate x-ray measurements may be made in radiotherapy equipment working in conjunction with magnetic resonance imaging for accurate dose placement.

主权项

1. A radiation detector comprising:
a detection optical fiber communicating with a scintillating material responsive to radiation at a distal end; a light detecting module communicating with a proximal end of the detection optical fiber to receive light through the detection optical fiber from the scintillating materials, the light detecting module providing at least one photodetector; and a shielded cable communicating with the photodetector and adapted to conduct an electrical signal from the photodetector to an electronic display remote from the photodetector; wherein the light detecting module and shielded cable are substantially free from ferromagnetic materials.