Radiosialometry. 1. A method for evaluation of salivary gland disorders.

The temporal course of the total 99Tcm40 acumulation in the parotoid glad after fast intravenous injection of the readionucleotide, is studied by examination with quantitative radiosialometry. The method adopted is based on the use of two collimated, symmetrically located and opposite placed NaI-detectors. The normal ranges of five evaluation parameters are obtained from a control material of 100 parotoid glands in 50 individuals without disorders of the parotoid glands. The reproducibility of these five evaluation parameters is estimated and the sensitivity and the detectability of the parameters as well as different sources of variation are discussed. Classification boundaries between normal and abnormal valves values are arbitrarily chosen form the normal ranges.