Computed Radiography システムの入出力特性を取得するための改良型マルチスリット装置の製作–ヒール効果の影響の補正と高管電圧実験への適用–

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  • Fabrication of Improved Multi-slit Equipment to Obtain the Input-output Characteristics of Computed Radiography Systems: Correction of the Heel Effect, and Application to High Tube-voltage Experiments
  • Computed Radiography システム ノ ニュウシュツリョク トクセイ オ シュトク スル タメ ノ カイリョウガタ マルチスリット ソウチ ノ セイサク : ヒール コウカ ノ エイキョウ ノ ホセイ ト コウカン デンアツ ジッケン エ ノ テキヨウ

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Multi-slit equipment is a new experimental apparatus that can measure the input-output characteristics of a CR (computed radiography) system with limited influence of the fading effect. Kimoto et al. recently proposed a new type of multi-slit apparatus in which the multi-slit setup, the insertion region of the phosphor plate, and plate shielding are integrated to create a single handy-type item (an all-in-one type multi-slit apparatus). However, some problems remained unsolved. The aims of this study were to devise a setup for application to high tube voltage conditions, and to improve the all-in-one type multi-slit equipment so as to correct the heel effect. We examined the capabilities of our improved multi-slit equipment using diagnostic X-ray apparatus and found that it can obtain input-output characteristics with 5% accuracy for tube voltages of 40–140 kV and SID (source to image receptor distances) of 50–200 cm.

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