For 14 years, Stockholm was the only location where a gamma unit was in use. During this period, a variety of indications were treated. The original machine had been designed with a view to treating functional disease. This was impractical as new medicines had tried up the referrals. So, the machine was used for certain tumors and vascular lesions. A new gamma unit was made this time with round collimators more suited to the task in hand. All in all, 762 patients were treated during this time with 209 vascular, 342 tumor, and 177 functional indications. There were also 34 diverse cases. All these cases were treated before the introduction of computerized imaging.