Optical scanning tomography for three-dimensional dosimetry and imaging of energy fields
US6218673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/4795
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical scanner gives three dimensional dosimetric data by scanning, with at least one light beam, a translucent medium exhibiting optical properties which change upon receipt of radiant energy representing a dose distribution of the energy. At least one detector is employed to gather data indicative of changes in the optical properties of the medium after scanning from multiple directions to provide a representation of the optical properties in sections through the medium. Typical optical properties measured include optical density, light scattering, emitted light intensities, and combinations thereof. Methods of reconstructing a three-dimensional energy field as a series of two-dimensional images by applying an energy field to a translucent medium having distinct optical properties that change upon receipt of the energy field, optically scanning the translucent medium at various angles, detecting and measuring data indicative of optical changes in the medium, and preparing a two-dimensional image of the energy field by analyzing the changes in the optical properties are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.