Definition - What does Phased Array Technology mean? Ultrasound beams are used in phased array (PA) ultrasonic equipment, which is considered an advanced method of ultrasonic testing. This technology finds applications in medical science and non-destructive testing. This method is more accurate at finding flaws in manufactured materials such as welds.
A migraine is a medical condition which usually causes a pounding, throbbing headache on one side of the head. The pain may be very bad and hurt so much that a person may have a hard time doing anything. While most people who have migraines get a headache, not everyone does.
Steve Kagan for The New York Times Terri Sinnott, a museum consultant featured in Patient Voices: Migraine, began getting headaches in her mid-30s. 1  Many readers of the Consults blog wanted to learn more about âmini-migraines,â low-level headaches that are not as debilitating as full-blown migraine attacks.