MR receive coil with detune circuit and energy harvesting circuit
First Claim
1. A magnetic resonant scanner comprising:
- a receiving antenna;
a detune circuit coupled to the receiving antenna for switching the receiving antenna between a resonant mode and a non-resonant mode, the receiving antenna in the resonant mode receiving a magnetic resonant signal of a magnetic resonant examination;
an energy harvesting circuit electrically coupled in parallel with the detune circuit for inducing a harvesting current flowing through the receiving antenna in the non-resonant mode and for harvesting electric energy from the receiving antenna, wherein the harvesting current is determined based upon an input impedance (Zin) of the energy harvesting circuit.
3 Assignments
0 Petitions
Accused Products
Abstract
A magnetic resonant device includes a receiving antenna, a detune circuit, and an energy harvesting circuit. The detune circuit is coupled to the receiving antenna for switching the receiving antenna between a resonant mode and a non-resonant mode. The receiving antenna in the resonant mode receives a magnetic resonant signal of a magnetic resonant examination. The energy harvesting circuit is coupled to the detune circuit for inducing a harvesting current flowing through the receiving antenna in the non-resonant mode to harvest electric power from the receiving antenna. Advantageously, with this simple and low cost power scheme, traditional cumbersome and expensive DC cablings can be eliminated from the magnetic resonant device.
20 Citations
16 Claims
-
1. A magnetic resonant scanner comprising:
-
a receiving antenna; a detune circuit coupled to the receiving antenna for switching the receiving antenna between a resonant mode and a non-resonant mode, the receiving antenna in the resonant mode receiving a magnetic resonant signal of a magnetic resonant examination; an energy harvesting circuit electrically coupled in parallel with the detune circuit for inducing a harvesting current flowing through the receiving antenna in the non-resonant mode and for harvesting electric energy from the receiving antenna, wherein the harvesting current is determined based upon an input impedance (Zin) of the energy harvesting circuit. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12)
-
-
7. A coil assembly for a magnetic resonance scanner comprising:
-
an antenna configured to receive magnetic resonance signals, the antenna including a first capacitor; a detune circuit coupled in parallel with the first capacitor for switching the antenna between a resonant mode and a non-resonant mode, the detune circuit being configured to switch an inductor in connection with the first capacitor in a parallel resonant manner to form an open circuit in the non-resonant mode; an energy harvesting circuit electrically coupled in parallel with the detune circuit and configured to induce a harvesting current flow through the antenna in the non-resonant mode and to harvest electric energy from the antenna, wherein the harvesting current is determined based upon an input impedance (Zin) of the energy harvesting circuit.
-
-
8. An energy harvesting method for a magnetic resonant scanner performing an magnetic resonant examination, the energy harvesting method comprising:
-
switching a receiving antenna between a resonant mode and a non-resonant mode by a detune circuit; receiving a magnetic resonant signal of a magnetic resonant examination by the receiving antenna in the resonant mode; inducing a harvesting current flowing through the receiving antenna in the non-resonant mode by an energy harvest circuit electrically coupled in parallel with the detune circuit, wherein the harvesting current is determined based upon an input impedance (Zin) of the energy harvesting circuit and harvesting electric energy from the receiving antenna through which the harvesting current flows. - View Dependent Claims (9, 10, 13, 14, 15, 16)
-
Specification