The history of the development of MRI can be traced back to 1946, when Peter Mennes and Earl Bloch first proposed the theoretical basis of MRI, which laid the foundation for later MRI technology. In the early 1970s, Raymond Damozy and Paul Russell successfully used magnetic resonance imaging to image the human body, which is considered the birth of MRI technology. Later, with the continuous exploration and research of scientists, nuclear magnetic resonance technology has been widely used in many fields. The following is a brief review of the history of NMR development:
1946: Peter Mennes and Earl Bloch first proposed the theoretical basis for MRI, laying the foundation for later MRI technology.
Early 1970s: Raymond Damozy and Paul Russell successfully used magnetic resonance imaging to image the human body, which is considered the birth of MRI technology.
1973: Paul Russell and other scientists developed the first full-body MRI scanner for the human body.
1980s: MRI technology is further developed, including improved image quality, shorter scan times, and the development of more imaging sequences.
1990s: Higher field strength MRI devices appeared, such as the 3.0 Tesla(T) MRI machine, which provided better spatial resolution and better visualization of tiny structures.
Early 21st century: Functional magnetic resonance imaging (fMRI) becomes an important branch of the MRI field, which can show areas of brain activity.
In recent years, MRI technology has continued to improve, including faster scanning, higher spatial resolution, more accurate lesion detection and diagnosis, and more. After more than 70 years of development and application, NMR technology has become a powerful tool in the fields of physics, chemistry, medicine, biology, geology, materials and energy. With the continuous advancement of science and technology, NMR technology will continue to develop and bring more benefits to mankind.
Medically, MRI is a scientific test that allows the tissues inside the body to "speak". We can think of NMR as a super-powerful magnet. When we bring this magnet close to the human body, the nuclei inside the body are attracted by the magnetic field, producing a series of reactions.
These nuclei have different vibrational frequencies. When the magnetic field of a magnet matches the vibrational frequency of these nuclei, they resonate. For this resonance, we can use special instruments to capture their signals and convert those signals into images that we can see.
Through MRI, we can understand what is going on inside the body. Because the vibrational frequency of atomic nuclei in different tissues and organs is different. For example, in fats, the vibrational frequencies of certain nuclei are particularly noticeable, but not so much in water. So, by looking at the resonance of the nucleus, we can know what is going on inside the body. MRI can show more detail than CT, but it is also more expensive