PIPの放射線写真への応用（Ⅰ）

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書誌事項

タイトル別名
  • Radiography with Persistent Internal Polarization
  • PIPの放射線写真への応用-1-
  • PIP ノ ホウシャセン シャシン エ ノ オウヨウ 1

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抄録

Some electrophotographic methods using PIP (persistent intemal polarization) of phosphor layers are reported recentry about their characteristics and their possibility of utllization to practical uses in the region of visible infrared, and ultraviolet light.<br/> The performance, of PIP in radiology, however are quite unknown essentially. We have examined the characteristics of the radiography with PIP, mainly in the tube voltage region from 60 kVp to 90 kVp X-ray for medical purposes. Experiments were perfomed by the nearly same procedures as in the visible region, applying dc field to phosphor sheets sandwiched between two electrodes during excitation with X-ray, as one of which electrodes on the incident side an Al film evaporated on a 2mm thick bakelite base was used.<br/>Using an electrometer of rotating sector type, polarization charge quantities were measured, and also the reflection density corresponding to the charge quantities was decided after having fixed toners on the sheets by usual methods.<br/>Comparing this method with the usual silver halide photographic method (using intensifying screen Fs), sensitivity from 1/10 to 1/25, a little poorer contrast, and higher resolving power were obtained, and this sensitivity was competitive to that with radiography of nonscreen type.<br/>Improvements in the characteristics of the photography are expected to be possible by several means. Essential increase of sensitivity could be effected by using Phosphor sheets more sensitive to X-ray.

収録刊行物

  • 電子写真

    電子写真 4 (1), 1_13-1_17, 1962

    一般社団法人 日本画像学会

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