US 12,350,023 B2
Viscoelasticity characteristics acquisition device, viscoelasticity characteristics acquisition method, viscoelasticity characteristics acquisition program, and recording medium recording said program
Tomoya Nakazawa, Hamamatsu (JP); and Rui Sekine, Hamamatsu (JP)
Assigned to HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed by HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Filed on Sep. 8, 2021, as Appl. No. 17/469,737.
Application 17/469,737 is a continuation of application No. 15/739,906, granted, now 11,154,206, previously published as PCT/JP2016/057205, filed on Mar. 8, 2016.
Claims priority of application No. 2015-132527 (JP), filed on Jul. 1, 2015.
Prior Publication US 2021/0401312 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/021 (2006.01); A61B 5/00 (2006.01); A61B 5/02 (2006.01); A61B 5/022 (2006.01); A61B 5/1455 (2006.01)
CPC A61B 5/02125 (2013.01) [A61B 5/02007 (2013.01); A61B 5/02108 (2013.01); A61B 5/022 (2013.01); A61B 5/14552 (2013.01); A61B 5/6801 (2013.01); A61B 5/7257 (2013.01); A61B 5/0059 (2013.01); A61B 5/6825 (2013.01); A61B 5/6898 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system for acquiring viscoelastic characteristics of a blood vessel of an inspection target, the system comprising:
an irradiation device configured to irradiate an inside of a living body with light;
a photodetector configured to detect the light transmitted through the inside of the living body;
a non-transitory computer-readable recording medium that stores instructions for acquiring viscoelastic characteristics of the blood vessel of the inspection target; and
a processor configured to execute the instructions including:
acquire a time waveform corresponding to a volume pulse wave of the inspection target,
perform Fourier transform on the time waveform and acquire a volume pulse wave spectrum,
acquire a maximum blood pressure value of the inspection target and a minimum blood pressure value of the inspection target,
calculate the viscoelastic characteristics on the basis of acquired maximum blood pressure value, the acquired minimum blood pressure value, and the volume pulse wave spectrum at frequency bands equal to or higher than a frequency corresponding to a pulse of the inspection target, and
estimate a blood vessel age of the inspection target on the basis of the viscoelastic characteristics.