What is an RF coil?
An RF coil (radiofrequency coil) can be used as a transmitter and a receiver. It can transmit the excitation pulse which rotates the net magnetization in the z plane into the transverse (x−y) plane. In addition, it can be divided into three general categories: (1) transmit and receive coils; (2) receive only coils; and (3) transmit only coils.
What is an RF coil used for?
When used as a transmitter, the RF coil can generate an oscillating or rotating magnetic filed that is perpendicular to the Bo, or static main magnetic field. When used as a receiver, the coil can detect the MR signal. In the past, most RF coils had both transmit and receive capabilities. However, although RF coils serve both transmit and receive systems, most of today’s newer scanners utilize separate transmit-and-receive systems. In addition, some special parts transmit-receive RF coils are still in common use, especially those used for head and knee imaging.
Since the 1980s, RF coil technology improvements have produced significant advances in the functioning and quality of MRI images. Similarly, in the early 1990s, major improvements in image quality was the result of the move from large volume head and body coils to localized surface coils and multi-coil arrays for reception.
How to order
Express Transformers & Controls (2015) Ltd can manufacture high frequency coils to suit the customer’s requirements. These can be wound using traditional magnet wire or specialist options such as Litz wire or Furukawatex depending on the application. These coils can then be mounted or encapsulated to suit the equipment or environment into which they are going to be placed.
Furthermore, examples of our work can be seen in the gallery.
Please feel free to contact us to discuss your design requirements. Our lead engineer details are listed below and they are very happy to discuss your particular project needs with you.
- Mr Kev Haynes: firstname.lastname@example.org
- Mr Chris Atherton: email@example.com