Quality control is a process that is used to ensure a certain level of quality in a product or service. Quality control is an important and growing aspect in every field of life. It might encompass whatever actions a business seems necessary to provide for the control and verification of certain characteristics of a product or service. With the improvement of technology, we come across new and complicated devices and methods in different fields. Quality control is necessary in all of those new techniques. Our objective was to gather information about quality control in various fields. This book aims at disseminating useful and practical knowledge about quality control in several fields such as quality control in radiology and clinical imaging, in energy, cosmetics, and in clinical laboratory medicine.