1 osmosis The movement of water molecules across a partially-permeable membrane from a region of low solute concentration to a region of high solute concentration. 2  partially permeable Also called semi-permeable.
MRI Scans Explained. MRI (Magnetic Resonance Imaging) scanning is a medical investigation that uses an exceptionally strong magnet and radio frequency waves to generate image of your body. An MRI scan is one of the most sophisticated diagnostic tools available to help a referring clinician understand the cause of your particular health issue. By scanning the relevant sector(s) of a patientâs body, an MRI scan can help to diagnose the following: most ailments of the brain, including tumours and dementias.
What is an MRI scan? An MRI (or magnetic resonance imaging) scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures. The MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet. The magnet creates a strong magnetic field that aligns the protons of hydrogen atoms, which are then exposed to a beam of radio waves.