What does the term "B0" refer to in MRI imaging?

The term "B0" refers specifically to the static magnetic field strength in an MRI system. This is the baseline magnetic field that is applied uniformly throughout the imaging volume, which is crucial for aligning the nuclear spins of hydrogen atoms in the body. The strength of B0, typically measured in teslas (T), has a significant influence on the quality of the MRI images, including factors like signal-to-noise ratio and spatial resolution.

A higher B0 can lead to better image quality, allowing for finer details in the anatomical structures being imaged. It is foundational in MRI physics, as all other imaging parameters are influenced by this primary magnetic field. Understanding B0 is essential for interpreting MRI images and troubleshooting potential technical issues.