Weather Advisory: Temporary Door Closure

Due to extreme cold, access through the Moakley Building's entrance off Boston Medical Center Place will be temporarily closed from 4 p.m. Friday, Feb. 6, through 7 a.m. Monday, Feb. 9.

All patients and visitors should use the main entrance for the Menino and Yawkey Buildings during this time. The hospital remains open and operating as normal.

We appreciate your patience as we take these precautions during severe winter weather.

This painless test uses ultrasound to examine the blood circulation within the brain. A small amount of gel substance is applied topically over the area to be examined. Then, a device called a transducer is held in place on the skin's surface, and blood flow information has been recorded.