The GE Healthcare-backed ultrasound system developer has now raised more than $130m, and investors have another month to commit a further $3.5m.

InSightec, an Israel-based ultrasound system developer backed by conglomerate General Electric, has closed a $59m series D round backed by undisclosed major institutional investors from the US and Asia.

The company revealed in June that it had secured $50m investment from hedge fund sponsor York Capital Management and invited investors to either take part of the $50m or to add additional capital.

GE Healthcare, a subsidiary of General Electric, invested $27.6m of the $30.9m InSightec raised from its 2012 series…