Premium
Biomedical probe using a fiber‐optic coupled scintillator
Author(s) -
Swinth K. L.,
Ewins J. H.
Publication year - 1976
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594274
Subject(s) - scintillator , optical fiber , optics , medical imaging , materials science , medical physics , physics , medicine , detector , radiology
A high‐sensitivity biomedical radiation probe which employs a fiber‐optic coupled NaI(Tl) scintillator as a detector is described. It was developed for in vivo counting of low‐energy 239 Pu photons from material located in the tracheobronchial lymph nodes. This probe is 20 times as sensitive as a solid‐state probe (avalanche diode) previously developed for this application. Tests with 99m Tc show a sensitivity more than 90 times greater than biomedical probes using DcTe of GaAs; however, the improved sensitivity is largely due to an increased sensitive volume. Probes were evaluated in animals and phantoms for detection of 239 Pu and for location of lung tumors labeled with 111 In.