MEASURING DEVICE, MEASURING METHOD, AND PROGRAM

• Main Authors: HAMAMOTO MASAKI, OKADA YUTO, HAYASHI TETSUYA
• Format: Patent
• Language: English; Japanese
• Published: 03.03.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY

To provide a measuring device capable of estimating a type of a blood vessel in a non-contact manner.SOLUTION: A measuring device includes: an image acquisition unit for acquiring at least two images including a blood vessel image of an eyeball captured by emitting at least two kinds of light having mutually different peak wavelengths; a blood vessel cross section profile acquisition unit for acquiring a plurality of blood vessel cross section profiles indicating the distribution of pixel values of pixels at a plurality of blood vessel cross section positions of the at least two images respectively; an absorbance ratio calculation unit for calculating an absorbance at each of the blood vessel cross section positions of the plurality of blood vessel cross section positions from the plurality of blood vessel cross section profiles; a distribution creation unit for creating a plurality of sets of two-dimensional distributions, each set including an absorbance ratio and a blood vessel contrast index, and the absorbance ratio being calculated from the absorbance at each blood vessel cross section position; and a blood vessel type estimation unit for acquiring a cluster of a plurality of types of the blood vessel by executing clustering for the two-dimensional distributions, and estimating the type of the blood vessel at the plurality of blood vessel cross section positions.SELECTED DRAWING: Figure 2 【課題】血管の種別を非接触で推定できる測定装置を提供する。【解決手段】測定装置は、互いに異なるピーク波長を有する少なくとも二種類の光を照射して撮像された、眼球の血管像を含む少なくとも二つの画像を取得する画像取得部と、少なくとも二つの画像のそれぞれについて複数の血管断面位置の画素の画素値の分布をそれぞれ示す複数の血管断面プロファイルを取得する血管断面プロファイル取得部と、複数の血管断面プロファイルから、複数の血管断面位置のうちの各血管断面位置の吸光度を算出する吸光度算出部と、各組が吸光度比と血管コントラスト指標とを含む複数の組の二次元分布を作成し、吸光度比は、各血管断面位置の吸光度から算出される分布作成部と、二次元分布をクラスタリングして血管の複数の種別のクラスタを得て複数の血管断面位置の血管の種別を推定する血管種別推定部とを備える。【選択図】図２