Medical imaging is often perceived to designate the set of techniques that noninvasively produce images of the internal aspect of the body. In this restricted sense, medical imaging can be seen as the solution of mathematical inverse problems. This means that cause (the properties of living tissue) is inferred from effect (the observed signal).
Definition. Et al. is a Latin abbreviation that means 'and others'. It's used in place of names for the purpose of saving time and space when providing in-text citations.
Al is a suffix that means relating to, process of, or an action. An example of al used as a suffix is in the word hormonal, related to hormones. An example of al used as a suffix is in the word referral, related to the process of giving and checking a reference.