SIGNAL ANALYZING APPARATUS, SIGNAL ANALYZING METHOD AND PROGRAM
An aspect of the present invention is a signal analysis device including: a biological information acquisition unit that acquires time-series biological information regarding pulsation of a heart that is an analysis target; and an analysis unit that acquires information indicating a state of an activity of an ion channel on the basis of the biological information and distribution candidate information using, as the distribution candidate information, information indicating candidates for channel activity timing distribution which is distribution of timings of the activity of the ion channel in the heart.
1 . A signal analysis device comprising:
a processor; and
a storage medium having computer program instructions stored thereon, wherein the computer program instruction, when executed by the processor, perform processing of:
acquiring time-series biological information regarding pulsation of a heart that is an analysis target; and
acquiring information indicating a state of an activity of an ion channel in the heart on the basis of the biological information and distribution candidate information using, as the distribution candidate information, information indicating candidates for channel activity timing distribution which is distribution of timings of the activity of the ion channel.
2 . The signal analysis device according to claim 1 , wherein the distribution candidate information is expressed by a cumulative distribution function using a function representing candidates for channel activity timing distribution as a probability density function.
3 . The signal analysis device according to claim 2 , wherein the information indicating a state of the activity of the ion channel is acquired on the basis of a result of fitting one or a plurality of the cumulative distribution functions to the biological information.
4 . The signal analysis device according to claim 3 , wherein the fitting is fitting that minimizes a difference between the biological information and a linear sum of the plurality of cumulative distribution functions which includes overlapping domains of definition and satisfies predetermined conditions regarding weights including at least a condition that at least one of the weights has a sign that is different from that of other weights.
5 . A signal analysis method comprising:
acquiring time-series biological information regarding pulsation of a heart that is an analysis target; and
acquiring information indicating a state of an activity of an ion channel on the basis of the biological information and distribution candidate information using, as the distribution candidate information, information indicating candidates for channel activity timing distribution which is distribution of timings of the activity of the ion channel in the heart.
6 . A non-transitory computer readable medium which stores a program that causes a computer to function as the signal analysis device according to claim 1 .