Koninklijke Philips Corporation N.v.

Eduardo Mario Rey

Francis Patrick O'Neill

Robert Andrew Harwell

Mark Deems Nelson

Bernard Lis

An electrocardiogram (ECG) electrode patch () system () for use in a magnetic resonance (MR) environment includes a flexible patch material () configured for attachment to human skin, and a plurality of electrodes (). The electrodes () Care attached to the patch material () and configured to sense a plurality of ECG signals with different amplitudes across pairs of electrodes in at least two different directions.

Collecting and processing reliable ECG signals and gating pulses in a magnetic resonance environment

A cable for use in biopotential measurements in a magnetic resonance (MR) environment comprises a flexible plastic or polymer sheet () extending as a single unitary structure from a first end to an opposite second end, and an electrically conductive trace () disposed on the flexible plastic or polymer sheet and running from the first end to the opposite second end. The electrically conductive trace has sheet resistance of one ohm/square or higher, and may have a hatching or checkerboard pattern. The cable may further include an electrically insulating protective layer () disposed on the substrate and covering the electrically conductive trace, an electrode () disposed on the electrically conductive trace at the second end, an edge connector () at the first end, or various combinations of such features.

Magnetic resonance safe cable for biopotential measurements

A circuit () for use in an magnetic resonance (MR) system to reduce MR interference of a physiological signal S(f) includes a first summing/subtraction node (), a high pass filter (), and a second summing/subtraction node (). The first summing/subtraction node () inputs a first signal () including radio frequency magnetic interference N(f) and a physiological signal S(f), and a second signal () including the physiological signal S(f) and an error signal E(f), and subtractively combines the second signal with the first signal to generate a difference signal N(f)&#x2212;E(f). The high pass filter () filters the difference signal N(f)&#x2212;E(f) from the first summing/subtraction node. The second summing/subtraction node () subtractively combines the first signal S(f)+N(f) () and the filtered signal H(f)*[N(f)&#x2212;E(f)] from the high pass filter, and generates the second signal S(f)+E(f) ().

Reduction of MRI interference from the electrocardiogram using lead information

An apparatus comprises an electrical device or component () and a radio frequency shield arranged to shield the electrical device or component. The apparatus is disposed in a radio frequency (Bi) field generated by a magnetic resonance scanner and in time varying magnetic field gradients generated by the magnetic resonance scanner (). The radio frequency shield includes an electrically conductive sheet or layer having openings suppressing time varying magnetic field gradient induced vibration of the radio frequency shield.

Magnetic resonance-compatible electrical device with radio frequency shielding or an enclosure

A robust MR compatible ECG monitor () includes a connector () for connecting ECG electrode leads () to an internal circuit board (). The connector () includes connector pins () that run parallel to the circuit board () and tangentially contact solder pads () of the circuit board () at the edge of the circuit board (), eliminating sharp or right angle turns in conduction paths. The connector prevents movement of the connections due to mechanical stresses in all ranges of motion relative to four degrees of freedom, including translation, pitching, yawing, and rolling.

Fastener-less edge launch connector for MR-compatible medical monitoring

An electrode patch () enables securing five electrodes (E', A&#x2032;, S&#x2032;, I&#x2032;, N&#x2032;) or six electrodes (V&#x2032;, V&#x2032;, LA&#x2032;, RA&#x2032;, LL&#x2032;, RL&#x2032;) in a predefined pattern. The electrode patch is configured for disposal as a unit on a subject (SUBJ) in a magnetic resonance (MR) scanner (), and has a maximum electrodes separation (d) of at least 20 centimeters and not more than 50 centimeters. The predefined pattern enables 12-lead electrocardiographic signals to be synthesized from signals acquired by the five or six electrodes in the predefined pattern. A method that can use the electrode patch comprises: acquiring magnetic resonance data with a subject disposed in a MR scanner; securing a plurality of electrodes to the subject in the magnetic resonance scanner, the plurality of electrodes comprising fewer than ten electrodes; and synthesizing twelve leads corresponding to a conventional 12-lead electrocardiograph from electrocardiographic signals acquired by the plurality of electrodes with the subject disposed in the MR scanner.

Growing community of inventors

Orlando, FL, United States of America

Eduardo Mario Rey