Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Joseph M. Lasker"'
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 57:182-189
We introduce a novel digital lock-in detection technique for simultaneously measuring the amplitude and phase of multiple amplitude-modulated signals. Using particular modulation and sampling constraints and averaging filters, we achieve optimal nois
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76a57de09bd4acb5687387ebf4a67fcc
https://doi.org/10.1109/tim.2007.908604
https://doi.org/10.1109/tim.2007.908604
Autor:
Joseph M. Lasker, Mario Löcker, Andreas H. Hielscher, Christoph H. Schmitz, Randall L. Barbour
Publikováno v:
Review of Scientific Instruments. 73:429-439
In this article, we describe the design rationale and performance features of an integrated multichannel continuous wave (cw) near-infrared (NIR) optical tomographic imager capable of collecting fast tomographic measurements over a large dynamic rang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::239c94d5cd0dcf93835dcf6a63667a43
https://doi.org/10.1063/1.1427768
https://doi.org/10.1063/1.1427768
Autor:
Joseph M. Lasker, Alexander D. Klose, Avraham Y. Bluestone, Uwe J. Netz, Andreas H. Hielscher, Jürgen Beuthan, Mark G. Stewart, Gassan S. Abdoulaev
Publikováno v:
Disease Markers, Vol 18, Iss 5-6, Pp 313-337 (2002)
Scopus-Elsevier
Disease Markers
Scopus-Elsevier
Disease Markers
Diffuse optical tomography (DOT) is emerging as a viable new biomedical imaging modality. Using near-infrared (NIR) light, this technique probes absorption as well as scattering properties of biological tissues. First commercial instruments are now a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc1571d7e02d69e9fa1524fad132c6c8
https://doi.org/10.1155/2002/164252
https://doi.org/10.1155/2002/164252
Publikováno v:
Biomedical Optics.
We performed dynamic imaging studies on healthy volunteers and patients diagnosed with rheumatoid arthritis (RA) in proximal-interphalangeal finger joints. We observed pronounced differences between the hemodynamic effect occurring in healthy volunte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b8386ccacedaf1115b5da70d7a94c6e
https://doi.org/10.1364/biomed.2008.pdpbtuf3
https://doi.org/10.1364/biomed.2008.pdpbtuf3
Publikováno v:
EMBC
Digital lock-in detection provides spectroscopic and imaging instruments a means of measuring physical quantities with improved signal to noise ratios compared to analogue detection schemes. We introduce a digital lock-in detection algorithm for meas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f14504f1923c1e4ba381c2535460c44d
https://pubmed.ncbi.nlm.nih.gov/17947014
https://pubmed.ncbi.nlm.nih.gov/17947014
Publikováno v:
Diffuse Optical Imaging of Tissue.
Optical probing of hemodynamics is often employed in areas such as brain, muscular, and breast-cancer imaging. In these studies an external stimulus is applied and changes in relevant physiological parameters, e.g. oxy or deoxyhemoglobin concentratio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36e8de399c548b9e076c5d96011e1fb6
https://doi.org/10.1117/12.728576
https://doi.org/10.1117/12.728576
Publikováno v:
Diffuse Optical Imaging of Tissue.
We describe a new dynamic optical tomography system that is, unlike currently available analog instrumentation, based on digital data-acquisition and filtering techniques. At the heart of this continuous wave instrument is a digital signal processor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdaaae8aedf1ad7d2017c852f1ab87a
https://doi.org/10.1117/12.728578
https://doi.org/10.1117/12.728578
Autor:
Joseph M. Lasker, James M. Masciotti, Andreas H. Hielscher, Christoph H. Schmitz, Mathew Schoenecker
Publikováno v:
SPIE Proceedings.
In this paper we present a novel application of digital detection and data-acquisition techniques to a prototype dynamic optical tomography system. The core component is a digital signal processor (DSP) that is responsible for collecting and processi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d214730e97a7a5f55563681c1955b88
https://doi.org/10.1117/12.705915
https://doi.org/10.1117/12.705915
Publikováno v:
Diffuse Optical Imaging of Tissue.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcd143a826a5b49138ccbbb7da6b2910
https://doi.org/10.1364/ecbo.2007.6629_22
https://doi.org/10.1364/ecbo.2007.6629_22
Publikováno v:
Biomedical Optics.
We evaluated the performance of static and dynamic optical tomographic imaging for characterizing rheumatoid joints. We found that information generated by each approach is complementary and that using both modalities together enhances the diagnostic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0bc6caf0004c7504a4fa02a74cc3e58
https://doi.org/10.1364/bio.2006.sc10
https://doi.org/10.1364/bio.2006.sc10