Abstract
Magnetic resonance imaging (MRI) has the advantage of internal observation of complex materials over optical measurement. The reason is that MRI can measure not only the complex geometry, but also the spatially resolved temperature and velocity distributions of interstitial fluid flow. In the present paper, the accuracy of temperature measurement using the conventional Inversion Recovery (IR) method, which is based on temperature dependence of spin-lattice relaxation of water proton in a fluid, has been evaluated by measuring temperature maps of stagnant doped water in a differentially heated cell. The accuracy was within 10% of the temperature difference, δT = 17.2°C and the measurable temperature resolution was within ±0.5°C. A new method using a set of tagging pulses for simultaneous measurement of temperature and velocity maps of flowing fluid has been developed by being extended the conventional IR method. This method can compensate the reduction of the NMR signal intensity due to flow motion so that it can maintain the high accuracy of temperature measurement. Temperature and velocity maps of the doped water flowing through a cooled pipe were measured and the accuracy of temperature measurement was evaluated. The accuracy obtained using the present method was within 15% of the temperature difference, δT = 15°C.
| Original language | English |
|---|---|
| Pages (from-to) | 2791-2798 |
| Number of pages | 8 |
| Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 65 |
| Issue number | 636 |
| Publication status | Published - 1999 |
| Externally published | Yes |
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Keywords
- Magnetic resonance imaging
- Simultaneous measurement
- Temperature map
- Velocity map
ASJC Scopus subject areas
- Mechanical Engineering
- Condensed Matter Physics
Cite this
A new method for simultaneous measurement of temperature and velocity maps by magnetic resonance imaging. / Ogawa, Kuniyasu; Tobo, Makoto; Iriguchi, Norio; Hirai, Shuichiro; Okazaki, Ken.
In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 65, No. 636, 1999, p. 2791-2798.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A new method for simultaneous measurement of temperature and velocity maps by magnetic resonance imaging
AU - Ogawa, Kuniyasu
AU - Tobo, Makoto
AU - Iriguchi, Norio
AU - Hirai, Shuichiro
AU - Okazaki, Ken
PY - 1999
Y1 - 1999
N2 - Magnetic resonance imaging (MRI) has the advantage of internal observation of complex materials over optical measurement. The reason is that MRI can measure not only the complex geometry, but also the spatially resolved temperature and velocity distributions of interstitial fluid flow. In the present paper, the accuracy of temperature measurement using the conventional Inversion Recovery (IR) method, which is based on temperature dependence of spin-lattice relaxation of water proton in a fluid, has been evaluated by measuring temperature maps of stagnant doped water in a differentially heated cell. The accuracy was within 10% of the temperature difference, δT = 17.2°C and the measurable temperature resolution was within ±0.5°C. A new method using a set of tagging pulses for simultaneous measurement of temperature and velocity maps of flowing fluid has been developed by being extended the conventional IR method. This method can compensate the reduction of the NMR signal intensity due to flow motion so that it can maintain the high accuracy of temperature measurement. Temperature and velocity maps of the doped water flowing through a cooled pipe were measured and the accuracy of temperature measurement was evaluated. The accuracy obtained using the present method was within 15% of the temperature difference, δT = 15°C.
AB - Magnetic resonance imaging (MRI) has the advantage of internal observation of complex materials over optical measurement. The reason is that MRI can measure not only the complex geometry, but also the spatially resolved temperature and velocity distributions of interstitial fluid flow. In the present paper, the accuracy of temperature measurement using the conventional Inversion Recovery (IR) method, which is based on temperature dependence of spin-lattice relaxation of water proton in a fluid, has been evaluated by measuring temperature maps of stagnant doped water in a differentially heated cell. The accuracy was within 10% of the temperature difference, δT = 17.2°C and the measurable temperature resolution was within ±0.5°C. A new method using a set of tagging pulses for simultaneous measurement of temperature and velocity maps of flowing fluid has been developed by being extended the conventional IR method. This method can compensate the reduction of the NMR signal intensity due to flow motion so that it can maintain the high accuracy of temperature measurement. Temperature and velocity maps of the doped water flowing through a cooled pipe were measured and the accuracy of temperature measurement was evaluated. The accuracy obtained using the present method was within 15% of the temperature difference, δT = 15°C.
KW - Magnetic resonance imaging
KW - Simultaneous measurement
KW - Temperature map
KW - Velocity map
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M3 - Article
VL - 65
SP - 2791
EP - 2798
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 636
ER -