View source for US Patent Application 18202577. Non-contact MRI in-bore motion sensing method using CW Doppler radar with band-pass filtering simplified abstract

=Non-contact MRI in-bore motion sensing method using CW Doppler radar with band-pass filtering=


==Organization Name==

[[:Category:The Board of Trustees of the Leland Stanford Junior University|The Board of Trustees of the Leland Stanford Junior University]]


[[Category:The Board of Trustees of the Leland Stanford Junior University]]

==Inventor(s)==

[[:Category:Wonje Lee of Palo Alto CA (US)|Wonje Lee of Palo Alto CA (US)]][[Category:Wonje Lee of Palo Alto CA (US)]]

[[:Category:Greig C. Scott of Mountain View CA (US)|Greig C. Scott of Mountain View CA (US)]][[Category:Greig C. Scott of Mountain View CA (US)]]

[[:Category:John M. Pauly of Stanford CA (US)|John M. Pauly of Stanford CA (US)]][[Category:John M. Pauly of Stanford CA (US)]]

[[:Category:Shreyas S. Vasanawala of Stanford CA (US)|Shreyas S. Vasanawala of Stanford CA (US)]][[Category:Shreyas S. Vasanawala of Stanford CA (US)]]

==Non-contact MRI in-bore motion sensing method using CW Doppler radar with band-pass filtering - A simplified explanation of the abstract==


This abstract first appeared for US patent application 18202577 titled 'Non-contact MRI in-bore motion sensing method using CW Doppler radar with band-pass filtering

==Simplified Explanation==

The patent application describes a method for detecting subject motion in a magnetic resonance imaging (MRI) apparatus using Doppler radar.
* The method involves transmitting a continuous wave radio signal at a microwave frequency and receiving a reflected radio signal.
* The received signal is filtered and analyzed using a quadrature radio receiver with a software defined radio implementing Doppler radar.
* The motion of the subject is detected from the filtered reflected radio signal.
* The system uses two antennas positioned in the bore of the MRI apparatus.
* The first antenna is used for both transmission and reception, while the second antenna is used only for reception.
* Band-pass filters and an RF coupler are used to connect the antennas to the quadrature radio.
* The innovation allows for noncontact sensing of subject motion, improving the accuracy and efficiency of motion detection within an MRI apparatus.


==Original Abstract Submitted==

Noncontact sensing of subject motion using Doppler radar within a magnetic resonance imaging (MRI) apparatus transmits a band-pass filtered continuous wave radio signal at a microwave frequency and receives a band-pass filtered reflected radio signal. The subject motion is detected from the received band-pass filtered reflected radio signal using a quadrature radio receiver with a software defined radio implementing Doppler radar. A first antenna, used for transmission and reception, is connected to the quadrature radio using band-pass filters and an RF coupler. A second antenna, used for reception, is connected directly to the quadrature radio using band-pass filters. The antennas are positioned in a bore of the MRI apparatus.



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