Contrast-Enhancing Intracranial Mass
The presence of a defined lesion in the brain parenchyma that abnormally absorbs the gadolinium contrast agent, indicating tumor neovascularization.
Description
The patient is placed inside a large cylindrical magnet that aligns the protons in the body, while radiofrequency pulses alter this alignment. As protons return to their resting state, they emit signals that computers map into high-resolution cross-sectional images. Originating from nuclear magnetic resonance physics in the 1970s, it provides unparalleled contrast between different soft tissues.