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Biological information monitoring apparatus

A biological information and monitoring device technology, applied in the field of magnetic resonance imaging devices, can solve problems such as attenuation

Pending Publication Date: 2021-10-01
CANON MEDICAL SYST COPRPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional detection device using radio waves, not only the reflected waves from the subject but also the reflected waves from various structures around the subject are received at the same time, so attenuation occurs, and it is difficult to use high Reliable and stable detection of the subject's heartbeat and respiration

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0095] Hereinafter, a first embodiment of the present invention will be described based on the drawings.

[0096] figure 1 It is a block diagram showing the overall configuration of the living body information monitoring device 1 of the first embodiment. The living body information monitoring device 1 includes an antenna 10 and a living body information monitoring device main body 20 (hereinafter, simply referred to as the main body 20 ). The antenna 10 is a structure of an antenna device (not shown). In the first embodiment, the main body 20 of the living body information monitoring device basically has one antenna, so the antenna device is constituted by one antenna. On the other hand, in other embodiments described later, the living body information monitoring device main body 20 may have a plurality of antennas, and in this case, the antenna device is composed of a plurality of antennas.

[0097] The antenna 10 is placed close to the human body, that is, the subject. T...

no. 2 approach

[0129] Figure 6 It is a block diagram showing the overall configuration of the living body information monitoring device 1 of the second embodiment. The living body information monitoring device 1 of the first embodiment basically has one antenna 10, while the living body information monitoring device 1 of the second embodiment has a transmitting antenna 10 (first antenna) and a receiving antenna 11. (Second Antenna) This is at least 2 antennas.

[0130] The living body information monitoring device main body 20 has substantially the same configuration as the first embodiment, and includes an RF signal generator 30 , a transmission circuit 40 , a coupling amount detection circuit 50 , and a displacement detection circuit 60 .

[0131] The difference from the first embodiment in the main body 20 is that the transmission circuit 40 of the second embodiment does not have a directional coupler (DC) 43 . The power amplifier (PA) 42 of the transmission circuit 40 and the transmis...

no. 3 approach

[0147] Figure 10 It is a block diagram showing the overall configuration of the living body information monitoring device 1 of the third embodiment. The living body information monitoring device 1 of the third embodiment is a combination of the first embodiment and the second embodiment. Specifically, it is an embodiment configured such that a first mode corresponding to the first embodiment and a second mode corresponding to the second embodiment can be selected.

[0148] In the first mode, a high-frequency signal is input to the antenna 11, and based on the reflected signal from the antenna 11 (or the S11 parameter of the antenna 11), the subject's heartbeat, respiratory movement, and the like are measured. On the other hand, in the second mode, a high-frequency signal is input to the antenna 10, and based on the transmission signal from the antenna 10 to the antenna 11 (or the S21 parameter from the antenna 10 to the antenna 11), the heartbeat and respiration of the subje...

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Abstract

The purpose of the present invention is to stably detect biological information such as heartbeat and respiration of a subject with high reliability without applying a load to the subject. In one embodiment, a biological information monitoring apparatus includes: an antenna assembly including at least one antenna, the antenna assembly being disposed close to an object; a signal generator configured to generate a high-frequency signal; and a displacement detection circuit configured to detect a physical displacement of the object based on the high-frequency signal, wherein the at least one antenna includes: a main antenna to be supplied with the high frequency signal; and a parasitic element to which the high frequency signal is not supplied.

Description

technical field [0001] Embodiments disclosed in this specification and the drawings relate to a living body information monitoring device and a magnetic resonance imaging device. Background technique [0002] In imaging using a magnetic resonance imaging apparatus, the collected data fluctuates due to the movement of the human body caused by the beating of the heart (heartbeat) or respiration. Therefore, for example, regarding the heartbeat, a method of attaching electrodes of an electrocardiograph to a human body, adjusting imaging timing using signals output from the electrocardiograph, or correcting collected data based on signals of the electrocardiograph is used. [0003] However, attaching electrodes to the human body is a burden on the patient, and also causes a reduction in work efficiency for the imaging technician. [0004] In addition, there is also known a technique of collecting data for monitoring body motion caused by respiration (referred to as navigation da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055A61B5/024A61B5/08
CPCA61B5/055A61B5/024A61B5/08A61B5/721A61B5/0507A61B5/0205G01R33/34038G01R33/5612
Inventor 大石崇文富羽贞范
Owner CANON MEDICAL SYST COPRPORATION