Articles by Angela C. Tooker in JoVE
Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive Sarah H. Felix1, Kedar G. Shah1, Vanessa M. Tolosa1, Heeral J. Sheth1, Angela C. Tooker1, Terri L. Delima1, Shantanu P. Jadhav2, Loren M. Frank2, Satinderpall S. Pannu1 1Materials Engineering Division, Lawrence Livermore National Laboratory, 2UCSF Center for Integrative Neuroscience and the Department of Physiology, University of California, San Francisco Insertion of flexible neural microelectrode probes is enabled by attaching probes to rigid stiffeners with polyethylene glycol (PEG). A unique assembly process ensures uniform and repeatable attachment. After insertion into tissue, the PEG dissolves and the stiffener is extracted. An in vitro test method evaluates the technique in agarose gel.
Other articles by Angela C. Tooker on PubMed
Distal Airways in Humans: Dynamic Hyperpolarized 3He MR Imaging--feasibility Radiology. May, 2003 | Pubmed ID: 12663822 Dynamic hyperpolarized helium 3 (3He) magnetic resonance (MR) imaging of the human airways is achieved by using a fast gradient-echo pulse sequence during inhalation. The resulting dynamic images show differential contrast enhancement of both distal airways and the lung periphery, unlike static hyperpolarized 3He MR images on which only the lung periphery is seen. With this technique, up to seventh-generation airway branching can be visualized.
Quantification of Airway Diameters and 3D Airway Tree Rendering from Dynamic Hyperpolarized 3He Magnetic Resonance Imaging Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine. Feb, 2005 | Pubmed ID: 15678546 As another step toward extracting quantitative information from hyperpolarized 3He MRI, airway diameters in humans were measured from projection images and multislice images of the lungs. Values obtained were in good agreement with the Weibel lung morphometry model. The measurement of airway caliber can now be achieved without the use of ionizing radiation. Furthermore, it was demonstrated that 3D airway tree renderings could be constructed from the multislice data. Both the measurement of airway diameters and the rendering of 3D airway information hold promise for the clinical assessment of bronchoconstrictive diseases such as asthma and the associated evaluation of treatment effectiveness. Work is being done to address the uncertainties of the manually intensive methods we have developed.