Fig. 1.

(A) Autoradiography of ¹⁸F-fluorodeoxyglucose (¹⁸FDG) at the first analysis. (B) Autoradiography of ¹²⁵I-iodophenyl 9-methylpentadecanoic acid (¹²⁵I-9MPA) at the second analysis.

When ¹⁸FDG images were acquired (A), graded standards of both ¹⁸FDG which consisted ¹⁸FDG only and ¹²⁵I-9MPA which consisted ¹²⁵I-9MPA olny as described in second method in the section 2 in Measurement of radioisotope activity were placed on the sheet. When ¹²⁵I-9MPA images were acquired 9 days after the first experiment (B), the same sheet was exposed; note that the ¹⁸FDG standards had completely decayed. The respective ¹⁸FDG and ¹²⁵I-9MPA doses per rat were 436 μCi (16.1 MBq) and 11.6 μCi (0.43 MBq). The arrow indicates graded ¹⁸FDG standards. Arrowheads indicate graded ¹²⁵I-9MPA standards.