Biomedical Instrumentation and Multiscale Imaging
Contents
BIMI Expertise
- Experimental and Instrument Design:
- Optical and analytical instrumentation
- Mechanical design
- Sensitive Measurement Techniques:
- Atomic force microscopy and single molecule force spectroscopy
- Nano-optics, conventional optics, and laser technologies
- Fluorescence and optical spectroscopy
- Novel reporter molecules
- Mathematical Modeling:
- Complex data analysis
- Finite element analysis
- Statistical physics
- Bioinformatics and system biology
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Intramural Research Projects
The LCIMB Biomedical Instrumentation and Multiscale Imaging (BIMI) group provides
resources for conception, design, and development of specialized instrumentation
for clinical and laboratory research. BIMI scientists, who collaborate
closely with other intramural research program investigators, focus on several
major areas:
- Atomic Force Microscopy (AFM)
can provide topographic images at nanometer resolution and can also measure the
molecular forces and viscoelastic properties of biological structures. Single-molecule
force spectroscopy (SMFS) is a specialized form of AFM focusing on high-precision
and high-speed force/distance measurement underlying molecular structural folding
and intermolecular interactions. BIMI is developing experimental instrumentation
and theoretical modeling to permit the study and quantification of complex behavior
of samples at cellular, subcellular, and molecular levels.
- Optical Detection for capillary
and microchip systems typically requires custom design when looking at multiple
spectral regions or device channels. BIMI is building a fixed-optics, multi-channel,
multi-spectral detection system for polymer microfluidic devices, as well as a multi-color,
laser-induced fluorescence detector for a capillary electrophoresis and micro-flow
HPLC systems.
- Optical Imaging is a non-invasive
technique used to monitor biological function, locate diseased tissue, or assess
therapeutics in tissue or whole animals. BIMI has developed near-infrared instrumentation
that uses laser excitation of fluorescent probes in combination with computational
models of photon migration in tissue developed by collaborators in the National
Institute of Child Health and Development (NICHD) to locate precise targeted
sites.
- Nano-Optics and Optical Nanoscopy is being adapted by our staff to break the current
diffraction limit of conventional optical microscopy to achieve nanometric spatial
resolution on biological samples and systems. To break this barrier, we are using
multiple approaches, including hyperlensing using a new metamaterial;
near-field scanning optical microscopy (NSOM); single-probe localization; saturated
structured-illumination microscopy (SSIM); and multi-photon imaging in order to
achieve real-time observation at 100 nm resolution or higher.
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Accomplishments
- BIMI has established a core biological AFM facility. Our staff
is extending the functionality of several AFM platforms toward multimodal measurements
to yield more insights on biomolecules, their complexes, cells, and tissues. For
example, we have integrated optical total internal reflection fluorescence (TIRF)
microscopy with Bioscopy Z AFM, and we have constructed and significantly optimized
a Raman TIRF AFM based on a LabRam spectroscopy and an XE-120 AFM. Over the years,
our staff has had extensive experience applying such instrumentation to the
investigation of a broad range of biomedical samples and systems.
- Laser capture microdissection (LCM) technology is a powerful tool
that permits the clinical research investigator to select, capture, and transfer
pure tissue samples as small as a single cell from a histopathology slide to a vial
for analysis using molecular biology techniques. This technique and the initial
prototypes were first developed within BIMI, and the technology has since
been commercialized and is widely used in clinical pathology.
- cDNA microarray instrumentation, including printers and readers,
are critical technologies for gene discovery that analyze gene expression in
disease and other research investigations. BIMI engineers fabricate microarray
instrumentation and strive to improve its sensitivity in order to answer more
challenging research questions.
- BIMI developed instrumentation for analysis of chromosomal aberrations.
A high precision, computer controlled, mechanical manipulator selects individual
chromosome G-bands to permit preparation of chromosome probes, which act as unique
markers of the G-band. Spectral karyotyping instrumentation identifies translocations,
deletions, and other chromosomal abnormalities.
- BIMI has built instrumentation to perform real-time functional
brain imaging and to localize lesions in patients undergoing craniotomy.
Functional brain imaging requires highly specialized instruments for use in challenging
environments such as high magnetic fields.
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Meet the Staff
Paul Smith, Ph.D. - Chief and
Research Physicist, BIMI
Albert Jin, Ph.D. - Chief, Nanoinstrumentation
and Force Spectroscopy Unit, BIMI
Christopher Scully, M.S. -
Graduate Partnership Program Participant
Jane Romantseva, B.S. - Postbac IRTA
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Last Updated On 10/13/2011