SENSOR FUSION AND PROBABILISTIC PARAMETER ESTIMATION METHOD AND APPARATUS

摘要

A probabilistic digital signal processor using data from multiple instruments is described. Initial probability distribution functions are input to a dynamic state-space model, which operates on state and/or model probability distribution functions to generate a prior probability distribution function, which is input to a probabilistic updater. The probabilistic updater integrates sensor data from multiple instruments with the prior to generate a posterior probability distribution function passed (1) to a probabilistic sampler, which estimates one or more parameters using the posterior, which is output or re-sampled in an iterative algorithm or (2) iteratively to the dynamic state-space model. For example, the probabilistic processor operates on fused data using a physical model, where the data originates from a mechanical system or a medical meter or instrument, such as an electrocardiogram or pulse oximeter to generate new parameter information and/or enhanced parameter information.

主权项

1. An apparatus configured for processing sensor data representative of a body, comprising:
an analyzer, comprising:
a physical model representative of function of a circulatory system of the body, said physical model coded into a digital signal processor embedded in said analyzer, said digital signal processor configured to:
generate a prior probability distribution function using said physical model; andrepetitively fuse input data originating from at least two types of medical instruments, configured to measure separate sections of the circulatory system, with the prior probability distribution function to generate a posterior probability distribution function, said processor configured to process the posterior probability distribution function using the physical model to generate an output of at least one of:
a heart stroke volume related to power spent during systolic contraction of a heart of the body;a cardiac output flow rate;an aortic blood pressure; anda radial blood pressure.