vo nF ” a ea “M ad ae ORS v ane Ty Acta Radiologica M. BRUCER 134 Interamericana and since their results were no better than those laboratories in which only routine pro- A simulated urine sample was included in the standards’kit. Only a portion of the la- a reason for questioning much of the literature that has been published on thyroid uptake, but not all. Many of the articles here also the variation of results was considerable. Another question that was answered by some of the laboratories was in the absolute determination of the number of microcuries in the 100 per cent sample. Here the cedure are followed, the situation is one that is an immediate cause for concern. There 1s boratories did routine urine examinations, but concern only relative differences. Frequent- ly, although one laboratory may have given an answer both laboratories would have been able to duplicate their own answer. Results in any one laboratory were usually reprodu- results were remarkably accurate. It is apparent, therefore, that in most clinical labora- tories, where they are sufficiently well equipped to do absolute calibrations on a small sample, the results cible but the error was not neecssarily con- sistent from high uptakes to low uptakes. TABLE 1 Eu-Thyroid Euphemia Ibis *Lulu **D rusilla ** Hortense Chloe Moira Ophelia Terry Toma * Abigail ** Bridget ** Tezebel Low-Thyroid Well-Type When, however, they are asked to measure MANIKINS NAME Eu-Thyroid are usually accurate. Grenadine Katrinka * Felicia ** Nabby Pandora Queenie Rhoda STANDARD METOD HALF BODY UPTAKE DOSE 65 57 71 56 62 % % & % % 50 10 20 11 50 uc uc uc uc uc 2.4 1.5 2.5 2.5 2.0 % % % % % 27 33 36 38 % % & % 50 20 1 100 uc uc uc uc 5.0 3.5 5.0 25 % % % G 42 % 33 % 20 % 7% 100 uc 11 uc 10 uc 50 uc BACKGROUND (50 G%) (50 %) 3.0 % 45 % 3.5 % 20.0 % 6 %& 7% 12 % 10 uc 10 uc 20 uc 15.0 % 22.0 %& 25.0 % (65 %) (35 %) (9 %&) 10 uc 10 uc 10 uc 2.5 % 5.0 % 20.0 % (Each Well-Type manikin has has three interchangeable Thyroid glands of 50 cc, 25 cc, and 15 cc volumes) Scanning: Bonnie Boleyn — thyroid 10 uc, blood vessels 2 uc each, spinal colum 5 uc, metastases 1 uc each Anne Boleyn * Available for one month loan ** Available for six months loan — thyroid 25 uc, blood vessels 2 uc each, spinal colum 5 uc, metastases 1 uc each