最適撮影条件とコンデンサ式X線装置

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タイトル別名
  • OPTIMUM RADIOGRAPH EXPOSURE FACTORS AND CONDENSER DISCHARGE TYPE OF X-RAY APPARATUS
  • サイテキ サツエイ ジョウケン ト コンデンサシキ Xセン ソウチ

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説明

So that "Good X-ray Radiograph" might be obtained, we hane studied optimum exposure factors and have concluded the fallowing. 1) The optimum exposure factors can be represented by the relation of object-thickness range under examination covered to the gradient of fluoresence attenuation curves. 2) It is very important to consider the X-ray rediographic contrast that covers whole thickness range to be examined, although only in a small portion of object density difference has been considered. 3) As a result of experiments with condenser discharge type X-ray apparatus, it is comfirmed that patients can be routine radiographed with the use of an acrylite phantom determing exposure factors. 4) A diagram illustrating exposure factors with the use of the transmitted fluorescence amount per mAs or the X-ray dose per mAs, object thickness, and varing X-ray tube voltage as a parameter is useful, because the mAs value of the optimum exposure factor can easily be found utilizing simple caluclative, or experimental data. Even if the value of the exposure factor that is a condenser capacity, focus-filmdistance etc. varies. 5) On the condenser discharge type X-ray apparatus with a fixed condenser capacity, the mAs value is determined as a result of select an optimum kV value, so that it is difficult to determine optimum exposure factors for objects of various thickness.

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