METHOD FOR MICROSCINTIGRAPHIC EVALUATION STUDIES

A method for making microscintigraphic evaluation studies in small areas at or adjacent to the surface of the body, such as evaluation of the dynamics of lacrimal flow from the eye through the lacrimal sac and nasolacrimal duct, which comprises situating a drop of radioactive tracer liquid of calibr...

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Bibliographic Details
Main Authors ROSSOMONDO; ROGER M, TRUEBLOOD; JON H, CARLTON; WILLIAM H
Format Patent
LanguageEnglish
Published 04.02.1975
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEASUREMENT OF NUCLEAR OR X-RADIATION
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
SURGERY
TESTING
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Summary:A method for making microscintigraphic evaluation studies in small areas at or adjacent to the surface of the body, such as evaluation of the dynamics of lacrimal flow from the eye through the lacrimal sac and nasolacrimal duct, which comprises situating a drop of radioactive tracer liquid of calibrated minimal volume in the flow path upstream of the area to be evaluated and observing the passage of the radioactive tracer along the flow path by means of a micropinhole collimator and scintillation camera. The method permits study of the dynamics of the lacrimal drainage apparatus in vivo with the radioactive tracer delineating the canaliculi. The drop of tracer liquid contains between 50 and 100 microcuries of radioactive matter providing a specific activity level of from 4.4 to 8.0 mCi/ml. The drop of radioactive liquid is calibrated to an accurate volume of 1/80 of 1 cc by a screw advance syringe, and the drop is administered through a needle shielded against contact with the body. The gamma ray imaging camera receives its radiation input through a micropinhole collimator providing an optimum resolution of about 1 mm through an aperture of approximately 0.11 cm and a field having an included angle of about 80 DEG .
Bibliography:Application Number: US19720264372