| 摘要 |
A digital film grain ( 20 ) comprises a phototransistor ( 40 ) which produces an electrical signal having a strength which is related to an input radiation flux. A transponder receives commands and power from a base station ( 80 ) and transmits information quantifying the radiation observed by that digital film grain. An image accumulator ( 84 ) connected to the base station ( 80 ) assembles an image from the profile of radiation reported by a distribution of digital film grains correlated to the locations of those grains.
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