Biological signal monitor device
By detecting the movement of biological tissues for inverse correction and noise processing, the problem of random noise caused by body movement is solved, clear analysis and accurate structural observation of biological tissues in ultrasound diagnosis are achieved, and the effect of medical diagnosis is improved.
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no. 1 Embodiment approach
[0058] Below, refer to from Figure 1 to Figure 5 ,as well as Figure 18 The first embodiment of the present invention will be described.
[0059] figure 1 It is a block diagram showing a configuration example of the biological signal monitoring device according to the first embodiment of the present invention.
[0060] The echo signal received by the ultrasonic probe 101 is transmitted to the movement amount detecting unit 113 via the receiving unit 110 and the delay combining unit 111 . The movement amount detection unit 113 detects the movement amount of the living tissue due to the pulsation by the phase tracking method. Next, with respect to the image information from the B-mode processing unit 112, only the portion of the movement amount obtained by the movement amount detection unit 113 is canceled (inversely corrected) in the inverse correction processing unit 114 as a correction mechanism, so that although it is a moving image, However, the generated body motion c...
no. 2 Embodiment approach
[0071] Below, refer to Figure 10 , Figure 11 and Figure 13 A second embodiment of the present invention will be described.
[0072] exist Figure 10 In the above, when focusing on the scan line 1006, as shown in the graph of the echo brightness value 1007 of the dynamic image, the boundary position also changes with the movement of the living tissue from the echo brightness value 1007, so the identification of the boundary position There is a high possibility of generating errors, especially in the case of a living body with atheroma (aperoma) 1005 that requires careful medical diagnosis, the echo brightness value may vary due to the composition of the content of the part, etc. Because of unevenness, the brightness values of the ultrasonic echo signals are different, as shown by the unclear outlines 1003a and 1004a of the B-mode image 1000, making it difficult to accurately determine the boundary positions of the blood vessel walls 1001 and 1002.
[0073] Therefore, b...
no. 3 Embodiment approach
[0082] Below, refer to Figure 17 and Figure 12 A third embodiment of the present invention will be described.
[0083] In this embodiment, when the positional relationship between the living body and the ultrasonic probe is the same, and the ideal measurement data such as the living body has stopped breathing to maintain a stable state has been obtained, the movement trajectory of the blood vessel wall per heartbeat is approximated, and the calculation process Section 115 ( figure 1 ) judge the stability (certain) degree of the measurement itself for measuring the IMT value or the inner diameter value of the blood vessel in a software manner.
[0084] Such as Figure 17 As shown, for example, in the trajectory of the movement trajectory 1710 of the previous period synchronized with the cardiac cycle of the ECG waveform 1700, the area range of the arbitrarily set allowable error range 1711 and the trajectory of the next measurement period can be added. For comparison, whe...
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