An MRI (or magnetic resonance imaging) scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures.The MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet.n MRI scan can be used as an extremely accurate method of disease detection throughout the body and is most often used after the other testing fails to provide sufficient information to confirm a patient's diagnosis. In the head, trauma to the brain can be seen as bleeding or swelling.
Another type of smoke detector was invented by NASA for use in space. The first edition of this device was introduced to the Skylab in 1973. This was necessary to to the requirement of adjustable sensitivity for the space station.
First patented by a gentleman named Herbert A. Gilbert in 1963, the first e-cigarette was described as a non-tobacco cigarette wherein a nicotine solution was heated up to produce steam. This was the first recorded instance of the idea of e-cigarettes; however, the product was never manufactured. Fast-forward to 1979, when Dr. Norman Jacobson invented an early form of the e-cigarette. Called the Favor cigarette, it was a device that gave users a way to inhale nicotine without the smoke. The decades that followed showed no improvements in e-cig technology, and Dr. Jacobsonâs invention was virtually ignored.