Functional imaging by I0- and T2*-parameter mapping using multi-image EPI - PubMed (original) (raw)
Functional imaging by I0- and T2*-parameter mapping using multi-image EPI
O Speck et al. Magn Reson Med. 1998 Aug.
Abstract
A new functional imaging method has been developed and used to measure T2*- and initial intensity (I0)-parameter maps of multiple slices during activation of the cortex with high temporal resolution. Multiple echo-planar images (EPIs) are read out after a single excitation of the spin system, leading to several images with increasing effective echo times. Changes induced by primary visual stimulation in T2* and I0 were measured in eight subjects. Although stimulation-induced increases in I0 only occurred at short repetition times, T2* increased from 57.3 to 60.9 ms on average. The method combines the high stability of a single shot EPI experiment with the high information content of a multiecho acquisition. In addition, stimulation-induced changes in inflow can be easily separated from true blood oxygenation level dependent (BOLD) signal changes.
Similar articles
- Gradient echo time dependence and quantitative parameter maps for somatosensory activation in rats at 7 T.
Grüne M, Pillekamp F, Schwindt W, Hoehn M. Grüne M, et al. Magn Reson Med. 1999 Jul;42(1):118-26. doi: 10.1002/(sici)1522-2594(199907)42:1<118::aid-mrm16>3.0.co;2-t. Magn Reson Med. 1999. PMID: 10398957 - BOLD sensitivity and SNR characteristics of parallel imaging-accelerated single-shot multi-echo EPI for fMRI.
Bhavsar S, Zvyagintsev M, Mathiak K. Bhavsar S, et al. Neuroimage. 2014 Jan 1;84:65-75. doi: 10.1016/j.neuroimage.2013.08.007. Epub 2013 Aug 15. Neuroimage. 2014. PMID: 23954488 - Enhancement of BOLD-contrast sensitivity by single-shot multi-echo functional MR imaging.
Posse S, Wiese S, Gembris D, Mathiak K, Kessler C, Grosse-Ruyken ML, Elghahwagi B, Richards T, Dager SR, Kiselev VG. Posse S, et al. Magn Reson Med. 1999 Jul;42(1):87-97. doi: 10.1002/(sici)1522-2594(199907)42:1<87::aid-mrm13>3.0.co;2-o. Magn Reson Med. 1999. PMID: 10398954 - Functional magnetic resonance imaging: the basics of blood-oxygen-level dependent (BOLD) imaging.
Forster BB, MacKay AL, Whittall KP, Kiehl KA, Smith AM, Hare RD, Liddle PF. Forster BB, et al. Can Assoc Radiol J. 1998 Oct;49(5):320-9. Can Assoc Radiol J. 1998. PMID: 9803232 Review. - [Functional magnetic resonance tomography of the visual cortex].
Brüning R, Danek A. Brüning R, et al. Radiologe. 1995 Apr;35(4):256-62. Radiologe. 1995. PMID: 7597158 Review. German.
Cited by
- Manifold Regularizer for High-Resolution fMRI Joint Reconstruction and Dynamic Quantification.
Guo S, Fessler JA, Noll DC. Guo S, et al. IEEE Trans Med Imaging. 2024 Aug;43(8):2937-2948. doi: 10.1109/TMI.2024.3381197. Epub 2024 Aug 1. IEEE Trans Med Imaging. 2024. PMID: 38526890 - Locally Low-Rank Denoising of Multi-Echo Functional MRI Data With Application in Resting-State Analysis.
Meyer NK, Kang D, Ahmed Z, In MH, Shu Y, Huston J 3rd, Bernstein MA, Trzasko JD. Meyer NK, et al. Top Magn Reson Imaging. 2023 Oct 1;32(5):37-49. doi: 10.1097/RMR.0000000000000307. Epub 2023 Sep 27. Top Magn Reson Imaging. 2023. PMID: 37796647 Free PMC article. - Cortical depth-dependent human fMRI of resting-state networks using EPIK.
Pais-Roldán P, Yun SD, Palomero-Gallagher N, Shah NJ. Pais-Roldán P, et al. Front Neurosci. 2023 May 18;17:1151544. doi: 10.3389/fnins.2023.1151544. eCollection 2023. Front Neurosci. 2023. PMID: 37274214 Free PMC article. - Improved Resting-State Functional MRI Using Multi-Echo Echo-Planar Imaging on a Compact 3T MRI Scanner with High-Performance Gradients.
Kang D, In MH, Jo HJ, Halverson MA, Meyer NK, Ahmed Z, Gray EM, Madhavan R, Foo TK, Fernandez B, Black DF, Welker KM, Trzasko JD, Huston J 3rd, Bernstein MA, Shu Y. Kang D, et al. Sensors (Basel). 2023 Apr 27;23(9):4329. doi: 10.3390/s23094329. Sensors (Basel). 2023. PMID: 37177534 Free PMC article. - A comparison of multiband and multiband multiecho gradient-echo EPI for task fMRI at 3 T.
Fazal Z, Gomez DEP, Llera A, Marques JPRF, Beck T, Poser BA, Norris DG. Fazal Z, et al. Hum Brain Mapp. 2023 Jan;44(1):82-93. doi: 10.1002/hbm.26081. Epub 2022 Oct 5. Hum Brain Mapp. 2023. PMID: 36196782 Free PMC article.
MeSH terms
LinkOut - more resources
Full Text Sources
Other Literature Sources
Medical