There is an increasing interest of working as a Radiologist or Radiology resident in Sweden.
To do this, you first have to get a Swedish medical license to practise.
https://www.socialstyrelsen.se/en/apply-and-register/licence-to-practise/
If you are from outside EU/EES, here is more information:
https://legitimation.socialstyrelsen.se/en/licence-application/outside-eu-eea/doctor-of-medicine-educated-outside-eu-eea/
When you have your license, you have to apply for a job (whether residency or if you already have a Radiology specialist license). Mostly, you find jobs through the local hospitals, and your best bet is to contact those directly. However, you can also find jobs through two medical newspapers - though those only have job postings in Swedish. Here are the links to those two papers:
https://lakartidningen.se/lakarkarriar/
https://www.dagensmedicin.se/lediga-jobb/
Knowledge of the Swedish language is essential when working in the Swedish Health Care system. You can read more about this here: https://legitimation.socialstyrelsen.se/en/licence-application/outside-eu-eea/doctor-of-medicine-educated-outside-eu-eea/