| 摘要 |
<p>[Problem] To enable an absorption distribution to be correctly obtained from a detected signal in a photoacoustic signal processing device, even if variations occur in the light pulse waveform. [Solution] A photoacoustic signal is generated in a test sample when the test sample is irradiated with light. The photoacoustic signal, which is detected using a probe (11), is sampled in an AD conversion means (22) via a reception circuit (21). A differential optical waveform signal generation means (25) uses a function to generate a differential optical waveform signal which is a differential waveform of the temporal waveform of the light intensity of the pulse beam with which the test sample was irradiated. The aforementioned function represents a temporal waveform of the optical intensity of the pulse beam or a differential waveform obtained by differentiating the temporal waveform, and uses the pulse time width of the pulse beam as an independent variable. A differential optical waveform signal deconvolution means (26) deconvolves a differential optical waveform signal from the photoacoustic signal. The absorption distribution is obtained using this deconvolution.</p> |
