System and method for noninvasive detection of arterial stenosis
First Claim
1. A method for generating a risk indicator representing a probability of a patient having an arterial stenosis, comprising the steps of:
- receiving a first signal representing one or more sound event caused by turbulence of blood flowing in an artery;
performing a wavelet transform on said first signal to provide information on both a frequency localization and a temporal localization of said one or more sound events represented by said first signal;
generating a feature vector having a plurality of parameters, said parameters include parameters resulting from the wavelet transform and a clinical examination; and
generating the risk indicator by manipulating said feature vector using a neural network.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for noninvasively detecting coronary artery disease. The system and method utilize a vasodilator drug to increase the signal-to-noise ratio of an acoustic signal that represents diastolic heart sounds of a patient. A wavelet transform is performed on the acoustic signal to provide parameters for a feature vector. Scaled clinical examination parameters such as a patient'"'"'s sex, age, body weight, smoking condition, blood pressure, and family history are also included in the feature vector. The feature vector is used as an input pattern to neural networks. The output of the neural networks represent a diagnosis of coronary stenosis in a patient.
153 Citations
13 Claims
-
1. A method for generating a risk indicator representing a probability of a patient having an arterial stenosis, comprising the steps of:
-
receiving a first signal representing one or more sound event caused by turbulence of blood flowing in an artery; performing a wavelet transform on said first signal to provide information on both a frequency localization and a temporal localization of said one or more sound events represented by said first signal; generating a feature vector having a plurality of parameters, said parameters include parameters resulting from the wavelet transform and a clinical examination; and generating the risk indicator by manipulating said feature vector using a neural network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A computer-based system for determining a risk indicator representing a probability of a patient having an arterial stenosis, comprising:
-
a processor; a storage medium including; a wavelet transform determinator, coupled to said processor, said wavelet transform determinator having an input coupled to receive a first signal representing acoustic measurements from blood flowing through an artery, and having an output, for performing a wavelet transform upon said first signal to generate a second signal at said wavelet transform determinator output representing acoustic events in said first signal; a feature vector generator, having an input coupled to said wavelet transform determinator output, for generating a feature vector based upon said wavelet transform determinator output; and a neural network determinator, having an input coupled to said feature vector generator, for receiving said feature vector and processing said feature vector with a neural network. - View Dependent Claims (10, 11, 12, 13)
-
Specification