Silent Scan is a completely new way of acquiring clinical images that nearly eliminates the noise in MR imaging.
The acoustic noise during MR scanning is one of the largest complaints from patients, technologists, and MR staff. The noise often adds significant stress to an already stressful clinical situation and has been a long standing issue with MR. With Silent Scan, GE has taken a major step towards Humanizing MR.
We did not dampen the noise from an MR scanner; we invented a way to avoid even making the noise
Noise is measured in decibels (dBA), a non-linear scale that is normalized to the human ear. Silent Scan adds less than 3dB of noise above the ambient levels in the room. Typically MR imaging adds about 30dB of noise above the ambient levels in the room … Silent Scan is a factor of about 1,000 times lower.
For reference, the magnet cold-head noise in the scan room is louder than a Silent Scan acquisition. The noise level from Silent Scan has been likened to an inkjet printer working in the room next door.
Silent Scan helps reduce anxiety and can give more peace of mind to patients, especially elderly, paediatric & claustrophobic patients.
During traditional MR image acquisition, the gradient coils within the magnet are continually switched on and off to generate image information. The faster the gradients are switched, the faster the image acquisition, and traditionally the better the image quality. Unfortunately, fast gradient switching leads to higher acoustic noise.
Silent Scan acquires image data with static gradients. The gradients do not switch (change amplitude within the TR) and thus do not generate noise.
Instead of switching the gradients on and off, Silent Scan uses ultra-fast RF switching technology to help generate images.
Information provided by GE Healthcare Technologies