Real Dictionary

imaging in American English
the act or process of recording or producing an image, esp. by such means as radar, ultrasound, CT scan, etc. as for scientific research or medical diagnosis
noun: a technique in which one uses mental images to control bodily processes and thus ease pain or to succeed in some endeavor that one has visualized in advance

imaging in British English
noun: the process of forming or obtaining images by electronically tracing something such as sound waves, temperature, or chemicals, rather than by using light rays or ordinary photography