Renal Ultrasound: Sonography of the Kidneys. Review literature: (Singer et al, 2006). Technique of Renal Ultrasound. Sonography of the kidney is best done in supine position and with inspiration of the patient. In adverse conditions, an elevation of the examination side by 30 degrees is helpful.
By Anne Marie Helmenstine, Ph.D. Chemical Change Definition: A chemical change is a process where one or more substances are altered into one or more new and different substances. Also Known As: chemical reaction.
Quick Answer. A phase change in science refers to any substance that changes from one state to another, with possible states being gas, liquid and solid. Substances typically phase change to the closest related state, such as liquid to solid, but in certain conditions can go from gas to solid or solid to gas. Continue Reading.