[A system of setting exposure conditions in general X-rays using a calculating formula].
The purpose of this study was to determine the exposure conditions for general X-rays by calculation. The concept of the basic equation for the calculation is that the dose after transmitting an object is determined by entering the exposure conditions. For this purpose, we formulated a basic equation by mathematically representing all factors that influence imaging conditions. Using the basic equation, we succeeded in determining the optimal exposure condition for a patient's body thickness by calculation. Even if another equipment, grid, added filter, etc., is used, optimal exposure conditions can be determined by adding correction factors determined by simple added measurements; this confirmed the versatility of the system. The calculation accuracy was verified to be within 15%. By using this system, we succeeded in optimizing exposure conditions for general X-rays.
Kyoto University Hospital, Clinical Radiology Service.
Kenichi
K
Ogawa
D006801:Humans; D008433:Mathematics; D011829:Radiation Dosage; D011859:Radiography / Q000379:methods*; D011874:Radiometry / Q000379:methods