MRI Scanner

Magnetic resonance imaging (MRI), or nuclear magnetic resonance imaging (NMRI) refers to a sophisticated medical technique used in radiology. This medical imaging technique is commonly used to visualize internal structure and functions of the body organs. The images captured by MRI technique give detail information to assess the functions inside the body. These images provide greater contrast between the different soft tissues of the body than other scanning technologies like computed tomography (CT) and X-rays. The magnetic resonance imaging scan is a non-invasive method that uses magnets and radio waves to give deep look inside the human body. It is widely used in the neurological treatment, musculoskeletal, cardiovascular, and oncological imaging. MRI does not use ionizing radiation like CT, but it uses powerful magnetic field to align the nuclear magnetization of hydrogen atoms in water that is present in the body. The MRI images can be reviewed on a large computer screen to identify the exact problem. Here radio frequency field is used to systematically alter the alignment of this magnetization, causing the hydrogen nuclei to produce a rotating magnetic field detectable by the scanner. A radiofrequency electromagnetic field makes the protons change their alignment relative to the field. As soon as the electromagnetic field is turned off, the released protons return to their original alignment.