Fast Calculation of T-2 Relaxation Time in Magnetic Resonance Imaging

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F14%3A00507187" target="_blank" >RIV/68081731:_____/14:00507187 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26220/14:PU110561

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Fast Calculation of T-2 Relaxation Time in Magnetic Resonance Imaging

Original language description

The main parameters displayed by means of magnetic resonance include, for example, relaxation times T-1 and T-2 or diffusion parameters. This paper presents the computation of relaxation time T-2 measured indirectly with the Spin Echo method. The sensing coil of the tomograph provides a signal in which the important factor is the location of the peaks from individual measurements. These points must be interleaved with an exponential function. The relaxation time T-2 can be directly determined from the exponential shape. The described process has to be repeated for each pixel of the sensed tissue, and this requirement makes the processing of larger images very demanding in terms of both the actual computation and the time needed for the entire operation. More concretely, if we assume the common resolution of 256x256, 20 slices, and five measurements with different times TE, it is necessary to reconstruct 1.3.106 exponential functions in total, which requires the processing of more than 6MB of data. At present, such computation lasts approximately 3 minutes if performed by means of a regular PC. The author discusses various approaches to the parallelization of the given problem. In the described context, the time required for the processing of the applied three-dimensional image was shortened to 300 ms thanks to simple interpolation approach. The final section of the paper comprises a detailed comparison of the computation times characterizing both the sequential and the parallel solutions.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

PIERS 2014 Guangzhou Proceedings

ISBN

978-1-934142-28-8

ISSN

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e-ISSN

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Number of pages

5

Pages from-to

2331-2335

Publisher name

The Electromagnetics Academy

Place of publication

Cambridge

Event location

Guangzhou

Event date

Aug 25, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000393225900517