Magnetic resonance imaging

Magnetic resonance imaging (MRI), nuclear magnetic resonance imaging (NMRI), or magnetic resonance tomography (MRT) is a medical imaging technique used in radiology to image the anatomy and the physiological processes of the body in both health and disease. MRI scanners use strong magnetic fields, radio waves, and field gradients to form images of the body.

Mri (fictional alien species)

The mri are a fictional alien species in the Faded Sun Trilogy of C. J. Cherryh's Alliance-Union universe. Their culture appears to be drawn upon those of the Apache, Berbers (especially Tuaregs), and Japanese samurai. Their name means simply "the people," and they refer to all other races as "tsi-mri," which literally means not people.

Physical appearance

The mri are a tall and slender humanoid species. Their skin is golden in color and their hair is coarse and golden-brown, generally worn shoulder-length. Their eyes are yellow, with epicanthic folds and a functional nictitating membrane to protect them against wind-blown grit. Their ears are slightly pointed, with a tuft of hair at the tip resembling that of a lynx.

Social structure

The mri are divided into a rigid structure of three castes: kel, sen, and kath. These are functional rather than hereditary castes, but each has a clearly defined role in their society, and the mri regard any change in those traditional functions as completely unacceptable.

Magnetic resonance microscopy

Magnetic resonance microscopy (MRM, µMRI) is magnetic resonance imaging (MRI) at a microscopic level down to the scale of 5-10 µm³. The first definition of MRM was MRI having voxel resolutions of better than 100 µm³.

Nomenclature

Magnetic resonance microscopy refers to very high resolution MRI imaging (down to nanometer scale, in some cases comparable with histopathology). The term MR microscopy is most widely used by the High Resolution Magnetic Resonance Imaging department at Duke University, headed by Dr. G. Allan Johnson, and the National High Magnetic Field Lab group at AMRIS, University of Florida/Florida State University.

Differences between MRI and MRM