PENGARUH PENGGUNAAN ATURAN SISTEM POIN PADA VARIASI TEGANGAN TABUNG TERHADAP NILAI DENSITAS RADIOGRAF FOTO THORAX

Abstract

ABSTRACT

The research had been done to determine the influence of system point rules to tube voltage variation in chest x-ray density. The purpose of this study to determine the value of the tube voltage that produces minimal density and maximum contrast on photos ribs, as well as tube voltage value that produces the maximum density and maximum contrast in the photo the lungs. This research is an experimental research with analytical studies. Data were collected by means of chest x-ray procedures, with settings of 60 - 150 kV, in accordance point system tables. Furthermore, from the radiograph eleven density measurement in the mediastinum, lungs, ribs, heart, and diaphragm. ribs contrast is obtained by calculating the difference in the density of  ribs and  lung density, while the contrast obtained by calculating the difference in the lungs and heart density. The results showed that, minimum density, and maximum ribs contrast obtained on the tube voltage of 60 kV, while the maximum density and maximum lungs contrast, obtained at a tube voltage of 150 kV.

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Keywords: point system, tube voltage, density, contrast