Functional Placental Scintigraphy

Abstract
A method to determine the uteroplacental blood flow in the last trimester of pregnancy is presented. After i.v. injefction of 37 MBq [megabequerel] 113In, the radiation above the placenta was recorded in 10 s intervals for 240 s by a scintillation camera. The data are presented in a time-activity curve, in which the maximum activity is proportional to the placenta volume, rise time can be defined and the quotient maximum activity/rise time is calculated. This quotient in an index of the uteroplacental blood flow which can be used for comparison of a series of patients.