“…This method was used up to the time when the more sensitive NaI(Tl) scintillation detectors became available and thyroid uptake measurements using a detector over the neck came into practice again. There was an impressive technical development in Sweden, including the construction of scintigraphs, at Radiumhemmet in Stockholm [22] as well as at the Sahlgrenska University Hospital in Gö teborg (Erik Berne and Ulf Jonsson at the company NUKAB). Before that, Johansson and Skanse [23] already in 1952 constructed a small gammacamera with a parallel hole collimator, NaI(Tl) as intensifying screen and photographic film as an imaging detector.…”