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The Design and Realization of a Dual Mode Photoacoustic and Ultrasound Imaging Camera

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Figure

Figure 2.1: The Fresnel integrals and the spectrum of the frequency modulated signal.It can be observed from 2.1(a) that the Fresnel integrals, both real (in solid blue) andimaginary (in dotted red) parts, have a limit of 0.5
Figure 3.7: PSFs collected at different positions without transducer filtering. Specifically,(f) corresponds to the PSF collected at the theoretical 2f image plane
Figure 3.8: PSFs collected at different positions with transducer effect. The transducerhas a response centered at 5 MHz with a −6 dB bandwidth of 2.745 MHz
Figure 3.11: Frequency components of the best PSF acquired by the designed system.From left to right: bandpass filtered PSF with center frequency of 1 MHz to 9 MHz,respectively
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