The localization of superficial cerebral lesions may be difficult even if they reach the surface of the cerebral cortex. Intraoperative ultrasound often fails to detect subcortical lesions. A localization device using multiplanar MR-imaging has been designed to project such lesions to the scalp. This device is a hood-shaped grid made of polyethylene tubing filled with paramagnetic contrast agent. In this hemispherical grid the tubes are arranged at a distance of 15 to 30 mm so that the MR-plane always slices perpendicular to the axis of the tubing and depicts a bright spot per tube. It is rapidly filled prior to each MR-examination, placed on the patient's head, and taped to his forehead to avoid unintentional displacement during and after the examination until the projection of the lesion is marked on the skin.
Brain neoplasm - Localization - Magnetic resonance imaging
