See Synchronization Prospective.

Generally, joint and limb prostheses presents low MRI risks of heating and magnetic attraction, but image artifacts can be caused by them.

If possible, prostheses should be removed prior to the MR examination. Risks are depending on the field strength, the used material, the shape and the length of prostheses. A material like titanium alloy is safely. The use of a low to mid field MRI device presents also a high safety.

The interactions between the most tested heart valve prostheses and the magnetic field of MRI devices are of no significance. However, there are many different types of heart valve prostheses and in the particular case their MRI safety should be checked.

Prosthetic heart valves, depending on the type and the material, are not necessarily considered to be dangerous in fields up to 3T. Patients should not undergo high field MRI examinations if valve dehiscence is clinically suspected.

A positively charged particle located in the nucleus of an atom. The number of protons in the nucleus governs the chemical properties of that element.

The concentration of mobile Hydrogen atoms within a sample of tissue.

See also Hydrogen Density.