| 摘要 |
A scanning, liquid ionization chamber IMAGER/DOSIMETER having a rectangular housing with a top of a thin predetermined thickness. An internal frame lies inside the rectangular housing and is welded thereto. Two planes of orthogonal wires are strung across the internal frame and immobilized thereby. These wires are electrically insulated from the rectangular housing and internal frame by non-conductive connectors. A first plane of wires serves a sensing function while the other plane of wires has a bias applied thereto one wire at a time. The rectangular housing is sealed after a liquid ionization medium completely fills any open space contained inside the rectangular housing. Non-conductive feed through wiring means are connected to the planes of wires. The first and second planes of wires are suspended in free space inside the rectangular housing. The liquid ionization medium is of a purity so as to extend electron lifetime; thus when a radiation beam causes electrons in the ionization medium these free electrons are swept away by the electric field of the applied bias and are output as a detected signal.
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