(R1/R2) The longitudinal relaxation rate is equal to reciprocal of relaxation time.

Lumirem® belongs to the negative oral contrast agents (same as GastroMARK®, another brand name for ferumoxsil). Lumirem® is used to distinguish the loops of the bowel from other abdominal structures and physiology. When Lumirem® is ingested, it flows through and darkens the stomach and the small intestine in 30 to 45 minutes. By more clearly identifying the intestinal loops, Lumirem® improves visualization of adjacent abdominal tissues such as the pancreas.
Additionally, in Europe Lumirem® is approved for rectal administration to delineate the lower intestinal system.

From Siemens Medical Systems;
while older navigator techniques take up to 40 minutes to create, the high performance of the MAGNETOM Sonata system enables 'complete examinations in less than 15 minutes'. It creates a new standard of diagnostic confidence and moves Cardiac MR from the research setting into routine clinical practice.

Short name: MP 2269, chemical compound: 4-pentyl-bicyclo [2.2.2] octan-1-carboxyl-di-L-aspartyllysine-DTPA, central moiety: Gd2+, relaxivity: r1=6.2, B0=1.0 T
An intravascular positive enhancing MRI contrast agent under development (preclin.) for MR angiography.

From ONI Medical Systems, Inc.;
MSK-Extremeâ„¢MRI system is a dedicated high field extremity imaging device, designed to provide orthopedic surgeons and other physicians with detailed diagnostic images of the foot, ankle, knee, hand, wrist and elbow, all with the clinical confidence and advantages derived from high field, whole body MRI units. The light weight (less than 650 kg) of the OrthOne System performs rapid patient studies, is easy to operate, has a patient friendly open environment and can be installed in a practice office or hospital, all at a cost similar to a low field extremity machine.
New features include a more powerful operating system that offers increased scan speed as well as a 160-mm knee coil with higher signal to noise ratio, and the option of a CD burner.