Ultrasound-contrast-agent dispersion and velocity imaging for prostate cancer localization

R.J.G. van Sloun, L. Demi, A. Postema, J.J.M.C.H. (Jean) de la Rosette, H. Wijkstra, M. Mischi

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Abstract

Prostate cancer (PCa) is the second-leading cause of cancer death in men; however, reliable tools for detection and localization are still lacking. Dynamic Contrast Enhanced UltraSound (DCE-US) is a diagnostic tool that is suitable for analysis of vascularization, by imaging an intravenously injected microbubble bolus. The localization of angiogenic vascularization associated with the development of tumors is of particular interest. Recently, methods for the analysis of the bolus convective dispersion process have shown promise to localize angiogenesis. However, independent estimation of dispersion was not possible due to the ambiguity between convection and dispersion. Therefore, in this study we propose a new method that considers the vascular network as a dynamic linear system, whose impulse response can be locally identified. To this end, model-based parameter estimation is employed, that permits extraction of the apparent dispersion coefficient (D), velocity (v), and Péclet number (Pe) of the system. Clinical evaluation using data recorded from 25 patients shows that the proposed method can be applied effectively to DCE-US, and is able to locally characterize the hemodynamics, yielding promising results (receiver-operating-characteristic curve area of 0.84) for prostate cancer localization.
Original languageEnglish
Pages (from-to)610-619
Number of pages10
JournalMedical Image Analysis
Volume35
Issue numberJanuari 2017
DOIs
Publication statusPublished - Jan 2017

Keywords

  • Dispersion and velocity
  • Dynamic contrast enhanced ultrasound
  • Prostate cancer
  • System identification
  • Prostatic Neoplasms/blood supply
  • Humans
  • Ultrasonography/instrumentation
  • Male
  • Contrast Media
  • Least-Squares Analysis
  • ROC Curve
  • Hemodynamics
  • Prostate

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