The Comparison of the Contrasts of Magnetic Resonance Images of Plants

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Comparison of the Contrasts of Magnetic Resonance Images of Plants

Popis výsledku v původním jazyce

To obtain an image with the largest information value, the best image contrast during the measurement of the object in the magnetic resonance tomograph is necessary to achieve. This contrast depends on the physical properties of the object, in particular a proton density and relaxation properties of the material. Furthermore, the contrast depends on parameter characteristic for each MR method: Spin Echo, Gradient Echo and Inversion Recovery. The echo time and repetition time are included between the two most important parameters of pulse sequence. We can create four different variants of contrast by combining these two mentioned times: the contrast spin density, the T1 weighted contrast, the T2 weighted contrast, and the last one is inappropriate setting for the contrast. Each resulting contrast is suitable for displaying different plant stem tissues. An increase in the contrast can also be achieved by adding contrast (paramagnetic) substances for differentiation of isomagnetics tissues. The aim of this paper is to display the internal morphology of plants by various methods with subsequent comparison of contrast and identification of an appropriate method for the study of transport of substances in the stem of the plant. Euphorbia cactus was chosen for the study of the image contrasts. This plant was inserted into working space of the tomograph. Images of the plant stem were acquired by a magnetic resonance tomograph with the magnetic field induction of 4.7 T (200 MHz). The evaluation of the results obtained via the applied methods as related the last measurement. The data processing was performed by using Marevisi and Matlab programs. Monitored parameters of individual plant samples were inserted into a table and inserted into graphs. By evaluating and comparing the relaxation times, it can be determined that, in the same selected points, the relaxation time T2 exhibits shorter values than the relaxation time T1. This holds true despite the fact that method for we

Název v anglickém jazyce

The Comparison of the Contrasts of Magnetic Resonance Images of Plants

Popis výsledku anglicky

To obtain an image with the largest information value, the best image contrast during the measurement of the object in the magnetic resonance tomograph is necessary to achieve. This contrast depends on the physical properties of the object, in particular a proton density and relaxation properties of the material. Furthermore, the contrast depends on parameter characteristic for each MR method: Spin Echo, Gradient Echo and Inversion Recovery. The echo time and repetition time are included between the two most important parameters of pulse sequence. We can create four different variants of contrast by combining these two mentioned times: the contrast spin density, the T1 weighted contrast, the T2 weighted contrast, and the last one is inappropriate setting for the contrast. Each resulting contrast is suitable for displaying different plant stem tissues. An increase in the contrast can also be achieved by adding contrast (paramagnetic) substances for differentiation of isomagnetics tissues. The aim of this paper is to display the internal morphology of plants by various methods with subsequent comparison of contrast and identification of an appropriate method for the study of transport of substances in the stem of the plant. Euphorbia cactus was chosen for the study of the image contrasts. This plant was inserted into working space of the tomograph. Images of the plant stem were acquired by a magnetic resonance tomograph with the magnetic field induction of 4.7 T (200 MHz). The evaluation of the results obtained via the applied methods as related the last measurement. The data processing was performed by using Marevisi and Matlab programs. Monitored parameters of individual plant samples were inserted into a table and inserted into graphs. By evaluating and comparing the relaxation times, it can be determined that, in the same selected points, the relaxation time T2 exhibits shorter values than the relaxation time T1. This holds true despite the fact that method for we

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

PIERS 2013 Taipei, Progress In Electromagnetics Reasearch Symposium

ISBN

978-1-934142-24-0

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

397-400

Název nakladatele

The Electromagnwetic Academy, USA

Místo vydání

Taipei

Místo konání akce

Taipei

Datum konání akce

25. 3. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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