Townsend, Middlesex County, Massachusetts, United States road map, satellite view, street view, terrain map, photos... Townsend, MA is situated at 42.67Â° North latitude, 71.71Â° West longitude and 91 meters elevation above the sea level.
Time of Flight. The simplest way to think about âtime of flightâ laser scanning is to look approach it as nothing more than a laser range finder. I think we all understand how a laser range finder works. It basically measures a distance by shooting a laser beam out to an object and measuring how long it takes that laser beam to bounce back.
1 MRI scanning uses magnetism, radio waves, and a computer to produce images of body structures. 2  MRI scanning is painless and does not involve x-ray radiation.  Patients with heart pacemakers, metal implants, or metal chips or clips in or around the eyes cannot be scanned with MRI because of the effect of the magnet.