EFFECTIVENESS OF GRID ON REDUCTION OF SCATTERED RAY

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  • lonization chamber法によるgrid特性
  • Ionization chamber法によるgrid特性
  • Ionization chamberホウ ニ ヨル grid トクセイ

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The grid ratio is used for expression of the quality of the grid. The scatter radiation was measured with the water phantom of 10cm thick which represented the chest of the human body of 20cm in thickness. By means of this phantom the Bucky factor, selectivity and contrast improvement factor was measured and discussed for various kinds of the grid with different grid ratio. As a result it was concluded that the grids of the ration in 12 : 1 was most suitable for 120kVp X-rays while that in 6 : 1 sor 70 and 90kVp X-rays.

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