To find elements which enable improving Quality of image of chest radiography, we attempted to make comparison between chest radiography used currently with that of the past, and following conclusion was reached:
1) It could be confirmed that a depen...
To find elements which enable improving Quality of image of chest radiography, we attempted to make comparison between chest radiography used currently with that of the past, and following conclusion was reached:
1) It could be confirmed that a dependance on chest radiography was declining, because proportion of chest radiography against overall radiography decreased.
2) There was a change of kVp to a high voltage in a chest radiography, and use of high kVp became a generalization
3) Exposure time was reduced and exposure dose was curtailed accordingly.
4) Apparatus was mainly comprised of 3-phase rectifier circuit and inverter type.
5) It could be confirmed that frequency of applying additional filters for high kVp radiography was insufficient.
6) There was almost no difference in the condition of exposure between hospitals using film/screen and hospitals using CR. But when CR is used for radiography, it was increase in exposure dose due to increase in tube current and it will be necessary to have continuous study on exposure dose by an increase use of CR in the future.