Abstract
Resolution in acoustical imaging is characterized by the spectral properties of the transducer used in an imaging system, with the center frequency determining the lateral resolution (together with the aperture size and the object distance) and the bandwidth determining the axial resolution. As opposed to other diagnostic imaging methods (like X-ray imaging) the resolution of acoustical imaging systems usually needs to be optimized. Resolution can be increased by using high frequency transducers with a large bandwidth. But there are limitations in approaching higher frequencies and higher bandwidths due to the attenuation of the medium which has to be imaged or which is surrounding the objects of interest. This attenuation is limiting the allowable object distance as well as the (axial) size of the object areas.
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Ermert, H., Pollakowski, M., Passmann, C., von Bernus, L. (1995). Acoustical Imaging Using an Optimal Combination of Signal Prefil Tering and Pulse Compression. In: Jones, J.P. (eds) Acoustical Imaging. Acoustical Imaging, vol 21. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1943-0_35
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DOI: https://doi.org/10.1007/978-1-4615-1943-0_35
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