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Multispectral diffusion-weighted imaging near metal implants.
Koch, Kevin M; Bhave, Sampada; Gaddipati, Ajeet; Hargreaves, Brian A; Gui, Dawei; Peters, Robert; Bedi, Meena; Mannem, Rajeev; Kaushik, S Sivaram.
Afiliación
  • Koch KM; Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
  • Bhave S; Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
  • Gaddipati A; MR Applications and Workflow, GE Healthcare, Milwaukee, Wisconsin, USA.
  • Hargreaves BA; Radiology, Stanford University, Stanford, California, USA.
  • Gui D; MR Applications and Workflow, GE Healthcare, Milwaukee, Wisconsin, USA.
  • Peters R; MR Applications and Workflow, GE Healthcare, Milwaukee, Wisconsin, USA.
  • Bedi M; Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
  • Mannem R; Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
  • Kaushik SS; MR Applications and Workflow, GE Healthcare, Milwaukee, Wisconsin, USA.
Magn Reson Med ; 79(2): 987-993, 2018 02.
Article en En | MEDLINE | ID: mdl-28470795
PURPOSE: The need for diffusion-weighted-imaging (DWI) near metallic implants is becoming increasingly relevant for a variety of clinical diagnostic applications. Conventional DWI methods are significantly hindered by metal-induced image artifacts. A novel approach relying on multispectral susceptibility artifact reduction techniques is presented to address this unmet need. METHODS: DWI near metal implants is achieved through a combination of several advanced MRI acquisition technologies. Previously described approaches to Carr-Purcell-Meiboom-Gill spin-echo train DWI sequences using the periodically rotated overlapping parallel lines with enhanced reconstruction are combined with multispectral-imaging metal artifact reduction principles to provide DWI with substantially reduced artifact levels. The presented methods are applied to limited sets of slices over areas of sarcoma risk near six implanted devices. RESULTS: Using the presented methods, DWI assessment without bulk image distortions is demonstrated in the immediate vicinity of metallic interfaces. In one subject, the apparent diffusion coefficient was reduced in a region of suspected sarcoma directly adjacent to fixation hardware. CONCLUSIONS: An initial demonstration of minimal-artifact multispectral DWI in the near vicinity of metallic hardware is described and successfully demonstrated on clinical subjects. Magn Reson Med 79:987-993, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Prótesis e Implantes / Procesamiento de Imagen Asistido por Computador / Artefactos / Imagen de Difusión por Resonancia Magnética Límite: Humans Idioma: En Revista: Magn Reson Med Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Prótesis e Implantes / Procesamiento de Imagen Asistido por Computador / Artefactos / Imagen de Difusión por Resonancia Magnética Límite: Humans Idioma: En Revista: Magn Reson Med Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2018 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos