A Study to Test a New Fluid to Improve the Quality of Images Obtained by Using Sound Waves (Ultrasound) During Surgery

The objective of this clinical investigation is to assess the safety and performance of the SonoClear® System. Performance will be assessed by analysis of the contrast-to-noise ratio (CNR) and assessment of image quality by using the Surgeon Image Rating (SIR) Scale. This is a prospective, multi-centre single arm study where the performance of the SonoClear® System relative to routinely used acoustic coupling fluid is investigated by each patient being their own control. Patients with the diagnosis of high-grade glioma (HGG) and low-grade glioma (LGG) at up to 5 sites in Germany will be included. Additionally, safety data are collected at 72 hours, 30 days and 6 months post procedure.