MICHÁLEK, Jan, Pavla HANZLÍKOVÁ, Tuan TRINH a Dalibor PACÍK. Fast and accurate compensation of signal offset for T2 mapping. Magnetic Resonance Materials in Physics, Biology and Medicine. Springer International Publishing, 2019, roč. 32, č. 4, s. 423-436. ISSN 0968-5243. Dostupné z: https://dx.doi.org/10.1007/s10334-019-00737-3. |
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@article{1498876, author = {Michálek, Jan and Hanzlíková, Pavla and Trinh, Tuan and Pacík, Dalibor}, article_number = {4}, doi = {http://dx.doi.org/10.1007/s10334-019-00737-3}, keywords = {Algorithms; Least-squares analysis; Software}, language = {eng}, issn = {0968-5243}, journal = {Magnetic Resonance Materials in Physics, Biology and Medicine}, title = {Fast and accurate compensation of signal offset for T2 mapping}, url = {https://doi.org/10.1007/s10334-019-00737-3}, volume = {32}, year = {2019} }
TY - JOUR ID - 1498876 AU - Michálek, Jan - Hanzlíková, Pavla - Trinh, Tuan - Pacík, Dalibor PY - 2019 TI - Fast and accurate compensation of signal offset for T2 mapping JF - Magnetic Resonance Materials in Physics, Biology and Medicine VL - 32 IS - 4 SP - 423-436 EP - 423-436 PB - Springer International Publishing SN - 09685243 KW - Algorithms KW - Least-squares analysis KW - Software UR - https://doi.org/10.1007/s10334-019-00737-3 L2 - https://doi.org/10.1007/s10334-019-00737-3 N2 - T2 maps are more vendor independent than other MRI protocols. Multi-echo spin-echo signal decays to a non-zero offset due to imperfect refocusing pulses and Rician noise, causing T2 overestimation by the vendor's 2-parameter algorithm. The accuracy of the T2 estimate is improved, if the non-zero offset is estimated as a third parameter. Three-parameter Levenberg--Marquardt (LM) T2 estimation takes several minutes to calculate, and it is sensitive to initial values. We aimed for a 3-parameter fitting algorithm that was comparably accurate, yet substantially faster. ER -
MICHÁLEK, Jan, Pavla HANZLÍKOVÁ, Tuan TRINH a Dalibor PACÍK. Fast and accurate compensation of signal offset for T2 mapping. \textit{Magnetic Resonance Materials in Physics, Biology and Medicine}. Springer International Publishing, 2019, roč.~32, č.~4, s.~423-436. ISSN~0968-5243. Dostupné z: https://dx.doi.org/10.1007/s10334-019-00737-3.
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