Age-related modification in the thymus of rats and mice: an in vivo study by magnetic resonance. MR imaging of the thymus.

Techniques of magnetic resonance were used to investigate in vivo the normal thymus and its age-related modifications in small rodents. The data were compared with anatomical preparations and histological sections of the animals. The possibility to visualize modifications of the thymus in living organisms open new perspectives for the follow up of experimental manipulations on laboratory animals.