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Design Considerations to Facilitate Clinical Radiological Evaluation of Implantable Biomedical Structures.
Pawelec, Kendell M; Chakravarty, Shatadru; Hix, Jeremy M L; Perry, Karen L; van Holsbeeck, Lodewijk; Fajardo, Ryan; Shapiro, Erik M.
Afiliación
  • Pawelec KM; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
  • Chakravarty S; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
  • Hix JML; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
  • Perry KL; College of Veterinary Medicine, Michigan State University, East Lansing, Michigan 48824, United States.
  • van Holsbeeck L; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
  • Fajardo R; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
  • Shapiro EM; Department of Radiology, Michigan State University, East Lansing, Michigan 48824, United States.
ACS Biomater Sci Eng ; 7(2): 718-726, 2021 02 08.
Article en En | MEDLINE | ID: mdl-33449622
Clinical effectiveness of implantable medical devices would be improved with in situ monitoring to ensure device positioning, determine subsequent damage, measure biodegradation, and follow healing. While standard clinical imaging protocols are appropriate for diagnosing disease and injury, these protocols have not been vetted for imaging devices. This study investigated how radiologists use clinical imaging to detect the location and integrity of implanted devices and whether embedding nanoparticle contrast agents into devices can improve assessment. To mimic the variety of devices available, phantoms from hydrophobic polymer films and hydrophilic gels were constructed, with and without computed tomography (CT)-visible TaOx and magnetic resonance imaging (MRI)-visible Fe3O4 nanoparticles. Some phantoms were purposely damaged by nick or transection. Phantoms were implanted in vitro into tissue and imaged with clinical CT, MRI, and ultrasound. In a blinded study, radiologists independently evaluated whether phantoms were present, assessed the type, and diagnosed whether phantoms were damaged or intact. Radiologists identified the location of phantoms 80% of the time. However, without incorporated nanoparticles, radiologists correctly assessed damage in only 54% of cases. With an incorporated imaging agent, the percentage jumped to 86%. The imaging technique which was most useful to radiologists varied with the properties of phantoms. With benefits and drawbacks to all three imaging modalities, future implanted devices should be engineered for visibility in the modality which best fits the treated tissue, the implanted device's physical location, and the type of required information. Imaging protocols should also be tailored to best exploit the properties of the imaging agents.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Imagen por Resonancia Magnética / Tomografía Computarizada por Rayos X Tipo de estudio: Diagnostic_studies / Guideline Idioma: En Revista: ACS Biomater Sci Eng Año: 2021 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: Imagen por Resonancia Magnética / Tomografía Computarizada por Rayos X Tipo de estudio: Diagnostic_studies / Guideline Idioma: En Revista: ACS Biomater Sci Eng Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos