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Samouilov A, Ahmad R, Boslett J, Liu X, Petryakov S, Zweier JL. Development of a fast-scan EPR imaging system for highly accelerated free radical imaging. Magn Reson Med 2019; 82:842-853. [PMID: 31020713 DOI: 10.1002/mrm.27759] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/07/2019] [Accepted: 03/11/2019] [Indexed: 01/01/2023]
Abstract
PURPOSE In continuous wave EPR imaging, the acquisition of high-quality images was previously limited by the requisite long acquisition times of each image projection that was typically greater than 1 second. To accelerate the process of image acquisition facilitating greater numbers of projections and higher image resolution, instrumentation was developed to greatly accelerate the magnetic field scan that is used to obtain each EPR image projection. METHODS A low-inductance solenoidal coil for field scanning was used along with a spherical solenoid air core magnet, and scans were driven by triangular symmetric waves, allowing forward and reverse spectrum acquisition as rapid as 3.8 ms. The uniform distribution of projections was used to optimize the contribution of projections for 3D image reconstruction. RESULTS Using this fast-scan EPR system, high-quality EPR images of phantoms and perfused rat hearts were performed using trityl or nanoparticulate LiNcBuO (lithium octa-n-butoxy-substituted naphthalocyanine) probes with fast-scan EPR imaging at L-band, achieving spatial resolutions of up to 250 micrometers in 1 minute. CONCLUSION Fast-scan EPR imaging can greatly facilitate the efficient and precise mapping of the spatial distribution of free radical and other paramagnetic probes in living systems.
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Affiliation(s)
- Alexandre Samouilov
- Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio
| | - Rizwan Ahmad
- Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio
| | - James Boslett
- Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio
| | - Xiaoping Liu
- Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio
| | - Sergey Petryakov
- Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire
| | - Jay L Zweier
- Davis Heart and Lung Research Institute and the Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, Ohio
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4
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Tseitlin M, Biller JR, Elajaili H, Khramtsov VV, Dhimitruka I, Eaton GR, Eaton SS. New spectral-spatial imaging algorithm for full EPR spectra of multiline nitroxides and pH sensitive trityl radicals. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2014; 245:150-5. [PMID: 25058914 PMCID: PMC4134677 DOI: 10.1016/j.jmr.2014.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 05/28/2014] [Accepted: 05/30/2014] [Indexed: 05/13/2023]
Abstract
An algorithm is derived and demonstrated that reconstructs an EPR spectral-spatial image from projections with arbitrarily selected gradients. This approach permits imaging wide spectra without the use of the very large sweep widths and gradients that would be required for spectral-spatial imaging with filtered back projection reconstruction. Each projection is defined as the sum of contributions at the set of locations in the object. At each location gradients shift the spectra in the magnetic field domain, which is equivalent to a phase change in the Fourier-conjugate frequency domain. This permits solution of the problem in the frequency domain. The method was demonstrated for 2D images of phantoms consisting of (i) two tubes containing (14)N and (15)N nitroxide and (ii) two tubes containing a pH sensitive trityl radical at pH 7.0 and 7.2. In each case spectral slices through the image agree well with the full spectra obtained in the absence of gradient.
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Affiliation(s)
- Mark Tseitlin
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Joshua R Biller
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Hanan Elajaili
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Valery V Khramtsov
- Dorothy M. Davis Heart & Lung Research Institute and Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Ilirian Dhimitruka
- Dorothy M. Davis Heart & Lung Research Institute and Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Gareth R Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA.
| | - Sandra S Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
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5
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Bézière N, Decroos C, Mkhitaryan K, Kish E, Richard F, Bigot-Marchand S, Durand S, Cloppet F, Chauvet C, Corvol MT, Rannou F, Xu-Li Y, Mansuy D, Peyrot F, Frapart YM. First Combined in Vivo X-Ray Tomography and High-Resolution Molecular Electron Paramagnetic Resonance (EPR) Imaging of the Mouse Knee Joint Taking into Account the Disappearance Kinetics of the EPR Probe. Mol Imaging 2012. [DOI: 10.2310/7290.2011.00042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Nicolas Bézière
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Christophe Decroos
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Karen Mkhitaryan
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Elizabeth Kish
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Frédéric Richard
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Stéphanie Bigot-Marchand
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Sylvain Durand
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Florence Cloppet
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Caroline Chauvet
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Marie-Thérèse Corvol
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - François Rannou
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Yun Xu-Li
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Daniel Mansuy
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Fabienne Peyrot
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
| | - Yves-Michel Frapart
- From CNRS UMR 8601, Université Paris Descartes, LCPBT; CNRS UMR 8145, Université Paris Descartes, MAP5, Université Paris Descartes, LIPADE, EA2517, Université Paris Descartes, INSERM UMR-S747, Department of Physical Medicine and Rehabilitation, Cochin Hospital (AP-HP), Université Paris Descartes; and Université Paris Sorbonne-IUFM de Paris, Paris, France
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9
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Ahmad R, Deng Y, Vikram DS, Clymer B, Srinivasan P, Zweier JL, Kuppusamy P. Quasi Monte Carlo-based isotropic distribution of gradient directions for improved reconstruction quality of 3D EPR imaging. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2007; 184:236-45. [PMID: 17095271 PMCID: PMC1892230 DOI: 10.1016/j.jmr.2006.10.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2006] [Revised: 10/11/2006] [Accepted: 10/16/2006] [Indexed: 05/11/2023]
Abstract
In continuous wave (CW) electron paramagnetic resonance imaging (EPRI), high quality of reconstructed image along with fast and reliable data acquisition is highly desirable for many biological applications. An accurate representation of uniform distribution of projection data is necessary to ensure high reconstruction quality. The current techniques for data acquisition suffer from nonuniformities or local anisotropies in the distribution of projection data and present a poor approximation of a true uniform and isotropic distribution. In this work, we have implemented a technique based on Quasi-Monte Carlo method to acquire projections with more uniform and isotropic distribution of data over a 3D acquisition space. The proposed technique exhibits improvements in the reconstruction quality in terms of both mean-square-error and visual judgment. The effectiveness of the suggested technique is demonstrated using computer simulations and 3D EPRI experiments. The technique is robust and exhibits consistent performance for different object configurations and orientations.
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Affiliation(s)
- Rizwan Ahmad
- Department of Electrical and Computer Engineering, The Ohio State University, College of Engineering, Columbus, Ohio 43210, USA
- Center for Biomedical EPR Spectroscopy and Imaging, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, College of Medicine, Columbus, Ohio 43210, USA
| | - Yuanmu Deng
- Center for Biomedical EPR Spectroscopy and Imaging, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, College of Medicine, Columbus, Ohio 43210, USA
| | - Deepti S. Vikram
- Center for Biomedical EPR Spectroscopy and Imaging, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, College of Medicine, Columbus, Ohio 43210, USA
| | - Bradley Clymer
- Department of Electrical and Computer Engineering, The Ohio State University, College of Engineering, Columbus, Ohio 43210, USA
- Department of Biomedical Engineering, The Ohio State University, College of Engineering, Columbus, Ohio 43210, USA
| | | | - Jay L. Zweier
- Center for Biomedical EPR Spectroscopy and Imaging, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, College of Medicine, Columbus, Ohio 43210, USA
| | - Periannan Kuppusamy
- Center for Biomedical EPR Spectroscopy and Imaging, Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University, College of Medicine, Columbus, Ohio 43210, USA
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