|
KMID : 0896219990190010045
|
|
Journal of Daegu Health College
1999 Volume.19 No. 1 p.45 ~ p.53
|
|
|
Measurements of Equivalent Focal Spot Size using Star Test Pattern
|
|
Kwon Deok-Moon
Park Jong-Sam
Lee Joon-Il
Nam Hyo-Duk
|
|
|
Abstract
|
|
|
|
In this study, equivalent focal spot sizes of X-ray tube were measured by star test pattern. As a result, the focal size was proportional to tube current and inversely proportional to tube voltage. Although tube current was increased the focal size was almost constant, when tube voltage is large than 80kVp. And, focal size was more increased at high tube current or low tube voltage. Resolution was more excellent if focal size was small. We confirmed what the radiation energy was distributed as edge band distribution in focus, because the intensity of energy at side was larger than in center.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|