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Comparison of Displacement Tracking Algorithms for in Vivo Electrode Displacement Elastography.
Pohlman, Robert M; Varghese, Tomy; Jiang, Jingfeng; Ziemlewicz, Timothy J; Alexander, Marci L; Wergin, Kelly L; Hinshaw, James L; Lubner, Meghan G; Wells, Shane A; Lee, Fred T.
Afiliación
  • Pohlman RM; Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA; Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Varghese T; Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, Wisconsin, USA; Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA. Electronic address: tvarghese@wisc.edu.
  • Jiang J; Department of Biomedical Engineering, Michigan Technological University, Houghton, Michigan, USA.
  • Ziemlewicz TJ; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Alexander ML; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Wergin KL; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Hinshaw JL; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Lubner MG; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Wells SA; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
  • Lee FT; Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.
Ultrasound Med Biol ; 45(1): 218-232, 2019 01.
Article en En | MEDLINE | ID: mdl-30318122
Hepatocellular carcinoma and liver metastases are common hepatic malignancies presenting with high mortality rates. Minimally invasive microwave ablation (MWA) yields high success rates similar to surgical resection. However, MWA procedures require accurate image guidance during the procedure and for post-procedure assessments. Ultrasound electrode displacement elastography (EDE) has demonstrated utility for non-ionizing imaging of regions of thermal necrosis created with MWA in the ablation suite. Three strategies for displacement vector tracking and strain tensor estimation, namely coupled subsample displacement estimation (CSDE), a multilevel 2-D normalized cross-correlation method, and quality-guided displacement tracking (QGDT) have previously shown accurate estimations for EDE. This paper reports on a qualitative and quantitative comparison of these three algorithms over 79 patients after an MWA procedure. Qualitatively, CSDE presents sharply delineated, clean ablated regions with low noise except for the distal boundary of the ablated region. Multilevel and QGDT contain more visible noise artifacts, but delineation is seen over the entire ablated region. Quantitative comparison indicates CSDE with more consistent mean and standard deviations of region of interest within the mass of strain tensor magnitudes and higher contrast, while Multilevel and QGDT provide higher CNR. This fact along with highest success rates of 89% and 79% on axial and lateral strain tensor images for visualization of thermal necrosis using the Multilevel approach leads to it being the best choice in a clinical setting. All methods, however, provide consistent and reproducible delineation for EDE in the ablation suite.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ultrasonografía Intervencional / Carcinoma Hepatocelular / Electrodos / Diagnóstico por Imagen de Elasticidad / Técnicas de Ablación / Neoplasias Hepáticas Tipo de estudio: Diagnostic_studies / Guideline / Qualitative_research Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Ultrasound Med Biol Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ultrasonografía Intervencional / Carcinoma Hepatocelular / Electrodos / Diagnóstico por Imagen de Elasticidad / Técnicas de Ablación / Neoplasias Hepáticas Tipo de estudio: Diagnostic_studies / Guideline / Qualitative_research Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Ultrasound Med Biol Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido