A Study of Quantitative Scale Display of the Organ Uptake with γ-Camera

Abstract

The fundamental study of quantitative scale display of the organ uptake with γ-camera was performed in special respect of the thyroid gland and the pancreas.
As one of the measurements on certain dimension of the organ, an optical progression outside the digital image was expressed, and was subjected to the quantitative scale with the use of the threshold level. And a rather satisfactory correlation was clinically obtaind between the scale display and the thyroidal ¹³¹I uptake.
For the purpose of revising the above scale display, the organ depth was measured with RI by the aid of the phantom. Then the pancreas depth was determined by the count rate ratio curve of 140 and 270 keV peak of ⁷⁵Se energies. However, the body background and the radioactive rays from the neighboring organs interferred this curve.