System, Method and Apparatus for Measuring Blood Flow and Blood Volume
First Claim
1. A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprising determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using said phase shift to calculate the blood flow in the organ.
9 Assignments
0 Petitions
Accused Products
Abstract
A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprises determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using the phase shift to calculate the blood flow in the organ.
83 Citations
89 Claims
- 1. A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprising determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using said phase shift to calculate the blood flow in the organ.
- 4. An apparatus for calculating blood flow in an organ of a subject from output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the apparatus comprising a signal processing unit for determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals, and a blood flow calculator for calculating the blood flow in the organ using said phase shift.
-
7. A system for measuring blood flow in an organ of a subject, the system comprising:
-
a radiofrequency generator for generating output radiofrequency signals; a plurality of electrodes, designed to be connectable to the skin of the subject, said electrodes being for transmitting said output radiofrequency signals to the organ and for sensing input radiofrequency signals of the organ; and a signal processing unit for determining a phase shift of said input radiofrequency signals relative to said output radiofrequency signals, said phase shift being indicative of the blood flow in the organ. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
-
41. A method of measuring blood flow in an organ of a subject, the method comprising:
-
generating output radiofrequency signals; transmitting said output radiofrequency signals to the organ and sensing input radiofrequency signals of the organ; and determining a phase shift of said input radiofrequency signals relative to said output radiofrequency signals and using said phase shift to calculate the blood flow in the organ. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
-
-
76. An apparatus for determining blood flow in an organ of a subject from output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the apparatus comprising:
-
electronic circuitry having an envelope elimination unit designed and configured to reduce or eliminate amplitude modulation of said input radiofrequency signals thereby to provide input radiofrequency signals of substantially constant envelope; and a signal processing unit for determining the blood flow in the organ using said input radiofrequency signals of substantially constant envelope. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89)
-
Specification