Objective of GLIOMARK is to clinically validate the permeability of the blood brain barrier (BBB) as an in vivo biomarker for the diagnosis and grading of gliomas. This will be accomplished by means of the radiotracer 99mTc-tetrofosmin (TTF) and the imaging technique Single-Photon Emission Computer To-mography (SPECT). The outcome of GLIOMARK is GlioTect, a diagnostic kit containing handling/diagn ...