WHAT IS MAGNETIC RESONANCE IMAGING (MRI)?
In magnetic resonance imaging section images are created by the interior of the body by using a strong magnetic field. In contrast to computer tomography (CT), magnetic resonance imaging is working with radio waves and not with X-rays. Soft tissue such as brain or internal organs can be illustrated particularly well by magnetic resonance imaging. In the investigation of bony structures are accessed rather back at the CT.Diagnostically relevant is also the possibility of dynamic processes, such as metabolic processes to map the brain.
MAGNETIC RESONANCE IMAGING – WITH HIGHLY COMPLEX TECHNOLOGY TO CUT IMAGE
Magnetic resonance imaging takes advantage of the ubiquitous proton in body fluids and fat advantage. By a magnetic field – about 20,000 times stronger than Earth’s magnetic field – are the spins, the magnetic properties of protons aligned. Now if additional energy in the form of a radio pulse – typical frequencies lie at 50 MHz – fed, tipping some spins in a higher energy state. Among energy output they return quickly back to its original state. An MR signal is generated. It depends on the chemical environment of protons, for example, fat, muscle or blood, and may be implemented by the computer in gray-scale images. The examined body regions in magnetic resonance imaging in narrow layers “decomposed” and shows the cross-sectional images obtained in this way on a monitor. The images can be exposed on films similar to CT or radiography.