Photoacoustic image reconstruction from ultrasound post-beamformed B-mode image

Haichong K. Zhang, Xiaoyu Guo, Hyun Jae Kang, Emad Boctor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A requirement to reconstruct photoacoustic (PA) image is to have a synchronized channel data acquisition with laser firing. Unfortunately, most clinical ultrasound (US) systems don't offer an interface to obtain synchronized channel data. To broaden the impact of clinical PA imaging, we propose a PA image reconstruction algorithm utilizing US B-mode image, which is readily available from clinical scanners. US B-mode image involves a series of signal processing including beamforming, followed by envelope detection, and end with log compression. Yet, it will be defocused when PA signals are input due to incorrect delay function. Our approach is to reverse the order of image processing steps and recover the original US post-beamformed radio-frequency (RF) data, in which a synthetic aperture based PA rebeamforming algorithm can be further applied. Taking B-mode image as the input, we firstly recovered US postbeamformed RF data by applying log decompression and convoluting an acoustic impulse response to combine carrier frequency information. Then, the US post-beamformed RF data is utilized as pre-beamformed RF data for the adaptive PA beamforming algorithm, and the new delay function is applied by taking into account that the focus depth in US beamforming is at the half depth of the PA case. The feasibility of the proposed method was validated through simulation, and was experimentally demonstrated using an acoustic point source. The point source was successfully beamformed from a US B-mode image, and the full with at the half maximum of the point improved 3.97 times. Comparing this result to the ground-truth reconstruction using channel data, the FWHM was slightly degraded with 1.28 times caused by information loss during envelope detection and convolution of the RF information.

Original languageEnglish (US)
Title of host publicationPhotons Plus Ultrasound: Imaging and Sensing 2016
PublisherSPIE
Volume9708
ISBN (Electronic)9781628419429
DOIs
StatePublished - 2016
EventPhotons Plus Ultrasound: Imaging and Sensing 2016 - San Francisco, United States
Duration: Feb 14 2016Feb 17 2016

Other

OtherPhotons Plus Ultrasound: Imaging and Sensing 2016
CountryUnited States
CitySan Francisco
Period2/14/162/17/16

Keywords

  • beamforming
  • envelope detection
  • log compression
  • Photoacoustic imaging
  • synthetic aperture

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Zhang, H. K., Guo, X., Kang, H. J., & Boctor, E. (2016). Photoacoustic image reconstruction from ultrasound post-beamformed B-mode image. In Photons Plus Ultrasound: Imaging and Sensing 2016 (Vol. 9708). [970837] SPIE. https://doi.org/10.1117/12.2213819