GPU-Accelerated Reconstruction of T2 Maps in Magnetic Resonance Imaging

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dc.contributor.authorMikulka, Jancs
dc.coverage.issue4cs
dc.coverage.volume2015cs
dc.date.issued2015-08-12cs
dc.description.abstractThe main tissue parameters targeted by MR tomography include, among others, relaxation times T1 and T2. This paper focuses on the computation of the relaxation time T2 measured with the Spin Echo method, where the sensing coil of the tomograph provides a multi-echo signal. The maxima of these echoes must be interleaved with an exponential function, and the T2 relaxation can be determined directly from the exponential waveform. As this procedure needs to be repeated for each pixel of the scanned tissue, the processing of large images then becomes very intensive. For example, given the common resolution of 256x256 with 20 slices and five echoes at different times TE, it is necessary to reconstruct 1.3106 exponential functions. At present, such computation performed on a regular PC may last even several minutes. This paper introduces the results provided by accelerated computation based on parallelization and carried out with a graphics card. By using the simple method of linear regression, we obtain a processing time of less than 36 ms. Another effective option consists in the Levenberg-Marquardt algorithm, which enables us to reconstruct the same image in 96 ms. This period is at least 900 times shorter than that achievable with professional software. In this context, the paper also comprises an analysis of the results provided by the above-discussed techniques.en
dc.description.abstractThe main tissue parameters targeted by MR tomography include, among others, relaxation times T1 and T2. This paper focuses on the computation of the relaxation time T2 measured with the Spin Echo method, where the sensing coil of the tomograph provides a multi-echo signal. The maxima of these echoes must be interleaved with an exponential function, and the T2 relaxation can be determined directly from the exponential waveform. As this procedure needs to be repeated for each pixel of the scanned tissue, the processing of large images then becomes very intensive. For example, given the common resolution of 256x256 with 20 slices and five echoes at different times TE, it is necessary to reconstruct 1.3106 exponential functions. At present, such computation performed on a regular PC may last even several minutes. This paper introduces the results provided by accelerated computation based on parallelization and carried out with a graphics card. By using the simple method of linear regression, we obtain a processing time of less than 36 ms. Another effective option consists in the Levenberg-Marquardt algorithm, which enables us to reconstruct the same image in 96 ms. This period is at least 900 times shorter than that achievable with professional software. In this context, the paper also comprises an analysis of the results provided by the above-discussed techniques.en
dc.formattextcs
dc.format.extent210-218cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMeasurement Science Review. 2015, vol. 2015, issue 4, p. 210-218.en
dc.identifier.doi10.1515/msr-2015-0029cs
dc.identifier.issn1335-8871cs
dc.identifier.orcid0000-0003-3270-1795cs
dc.identifier.other115690cs
dc.identifier.researcheridK-1324-2012cs
dc.identifier.scopus11140405800cs
dc.identifier.urihttp://hdl.handle.net/11012/68343
dc.language.isoencs
dc.publisherDe Gruyter Opencs
dc.relation.ispartofMeasurement Science Reviewcs
dc.relation.urihttp://www.degruyter.com/view/j/msr.2015.15.issue-4/msr-2015-0029/msr-2015-0029.xml?format=INTcs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1335-8871/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cs
dc.subjectCUDAen
dc.subjectSpin Echoen
dc.subjectT2 relaxationen
dc.subjectmagnetic resonance imagingen
dc.subjectCUDA
dc.subjectSpin Echo
dc.subjectT2 relaxation
dc.subjectmagnetic resonance imaging
dc.titleGPU-Accelerated Reconstruction of T2 Maps in Magnetic Resonance Imagingen
dc.title.alternativeGPU-Accelerated Reconstruction of T2 Maps in Magnetic Resonance Imagingen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-115690en
sync.item.dbtypeVAVen
sync.item.insts2025.10.14 14:13:08en
sync.item.modts2025.10.14 10:08:25en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav teoretické a experimentální elektrotechnikycs
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