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A Quantitative Digital Subtraction Angiography Technique for Characterizing Reduction in Hepatic Arterial Blood Flow During Transarterial Embolization

  • Laboratory Investigation
  • Embolisation (arterial)
  • Published:
CardioVascular and Interventional Radiology Aims and scope Submit manuscript

Abstract

Objective

There is no standardized and objective method for determining the optimal treatment endpoint (sub-stasis) during transarterial embolization. The objective of this study was to demonstrate the feasibility of using a quantitative digital subtraction angiography (qDSA) technique to characterize intra-procedural changes in hepatic arterial blood flow velocity in response to transarterial embolization in an in vivo porcine model.

Materials and Methods

Eight domestic swine underwent bland transarterial embolizations to partial- and sub-stasis angiographic endpoints with intraprocedural DSA acquisitions. Embolized lobes were assessed on histopathology for ischemic damage and tissue embolic particle density. Analysis of target vessels used qDSA and a commercially available color-coded DSA (ccDSA) tool to calculate blood flow velocities and time-to-peak, respectively.

Results

Blood flow velocities calculated using qDSA showed a statistically significant difference (p < 0.01) between partial- and sub-stasis endpoints, whereas time-to-peak calculated using ccDSA did not show a significant difference. During the course of embolizations, the average correlation with volume of particles delivered was larger for qDSA (− 0.86) than ccDSA (0.36). There was a statistically smaller mean squared error (p < 0.01) and larger coefficient of determination (p < 0.01) for qDSA compared to ccDSA. On pathology, the degree of embolization as calculated by qDSA had a moderate, positive correlation (p < 0.01) with the tissue embolic particle density of ischemic regions within the embolized lobe.

Conclusions

qDSA was able to quantitatively discriminate angiographic embolization endpoints and, compared to a commercially available ccDSA method, improve intra-procedural characterization of blood flow changes. Additionally, the qDSA endpoints correlated with tissue-level changes.

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Acknowledgements

Sarvesh Periyasamy is supported by an MD-Ph.D Graduate Fellowship through the University of Wisconsin School of Medicine and Public Health, Department of Radiology, an NCI Ruth L. Kirschstein NRSA Fellowship 1F30CA250408-01, and an MSTP NIH Grant T32GM008692. Carson Hoffman is supported by the Radiological Sciences Training Grant (NIH Grant T32CA009206 through the National Cancer Institute). Portions of the image processing were performed on a GPU donated by the NVIDIA Corporation.

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This study was not supported by any funding.

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Correspondence to Sarvesh Periyasamy.

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Author Michael A. Speidel received a grant from Siemens Healthineers. Author Paul F. Laeseke is a consultant for Neuwave Medical/Ethicon, a consultant and shareholder for Elucent Medical, a shareholder for Histosonics, and a shareholder for McGinley Orthopeadic Innovations. For the remaining authors, no other conflicts were declared.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.

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Periyasamy, S., Hoffman, C.A., Longhurst, C. et al. A Quantitative Digital Subtraction Angiography Technique for Characterizing Reduction in Hepatic Arterial Blood Flow During Transarterial Embolization. Cardiovasc Intervent Radiol 44, 310–317 (2021). https://doi.org/10.1007/s00270-020-02640-0

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  • DOI: https://doi.org/10.1007/s00270-020-02640-0

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