Swedish radiation therapy equipment maker Elekta EKTAb.ST topped the STOXX 600 after posting a bigger-than-expected first-quarter profit.

We have some small items of positive news, said Klas Idehaag, reactor inspector at the Swedish Radiation Safety Authority.

But we still judge the situation to be critical, said Per Bystedt, an analyst at the Swedish Radiation Protection Authority.

Swedish radiation therapy equipment maker Elekta reported Q4 earnings beat expectations, and forecast profitability would improve in the new fiscal year.

Swedish radiation therapy equipment maker Elekta jumped 14.1% after it reported a bigger-than-expected first-quarter profit.

Radiation protection expert Jan Johansson at the Swedish Radiation Safety Authority said the variations were extremely low and had no impact on radiation protection.

Shares in Swedish radiation therapy gear maker Elekta EKTAb.ST fell 6.6 percent after it reported an unexpected drop in first-quarter operating profit.

Swedish radiation therapy gear maker Elekta was the biggest faller, down 6.6 percent after it reported an unexpected drop in first-quarter operating profit.