Fast and accurate compensation of signal offset for T2 mapping

J 2019

Fast and accurate compensation of signal offset for T2 mapping

MICHÁLEK, Jan; Pavla HANZLÍKOVÁ; Tuan TRINH and Dalibor PACÍK

Basic information

Original name

Fast and accurate compensation of signal offset for T2 mapping

Authors

MICHÁLEK, Jan (203 Czech Republic, guarantor, belonging to the institution); Pavla HANZLÍKOVÁ (203 Czech Republic); Tuan TRINH (203 Czech Republic, belonging to the institution) and Dalibor PACÍK (203 Czech Republic)

Edition

Magnetic Resonance Materials in Physics, Biology and Medicine, Springer International Publishing, 2019, 0968-5243

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10201 Computer sciences, information science, bioinformatics

Country of publisher

United States of America

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 1.956

RIV identification code

RIV/00216224:14330/19:00109168

Organization unit

Faculty of Informatics

DOI

http://dx.doi.org/10.1007/s10334-019-00737-3

UT WoS

000476510700002

EID Scopus

2-s2.0-85061291117

Keywords in English

Algorithms; Least-squares analysis; Software

Abstract

In the original language

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.

Links

90062, large research infrastructures

Name: Czech-BioImaging

Cite

MICHÁLEK, Jan; Pavla HANZLÍKOVÁ; Tuan TRINH and Dalibor PACÍK. Fast and accurate compensation of signal offset for T2 mapping. Magnetic Resonance Materials in Physics, Biology and Medicine. Springer International Publishing, 2019, vol. 32, No 4, p. 423-436. ISSN 0968-5243. Available from: https://dx.doi.org/10.1007/s10334-019-00737-3.

@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 and 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, vol.~32, No~4, p.~423-436. ISSN~0968-5243. Available from: https://dx.doi.org/10.1007/s10334-019-00737-3.

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