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A new NOE-mediated MT signal at around -1.6ppm for detecting ischemic stroke in rat brain.

Abstract：

:In the present work, we reported a new nuclear Overhauser enhancement (NOE)-mediated magnetization transfer (MT) signal at around -1.6ppm (NOE(-1.6)) in rat brain and investigated its application in the detection of acute ischemic stroke in rodent model. Using continuous wave (CW) MT sequence, the NOE(-1.6) is reliably detected in rat brain. The amplitude of this new NOE signal in rat brain was quantified using a 5-pool Lorentzian Z-spectral fitting method. Amplitudes of amide, amine, NOE at -3.5ppm (NOE(-3.5)), as well as NOE(-1.6) were mapped using this fitting method in rat brain. Several other conventional imaging parameters (R1, R2, apparent diffusion coefficient (ADC), and semi-solid pool size ratio (PSR)) were also measured. Our results show that NOE(-1.6), R1, R2, ADC, and APT signals from stroke lesion have significant changes at 0.5-1h after stroke. Compared with several other imaging parameters, NOE(-1.6) shows the strongest contrast differences between stroke and contralateral normal tissues and stays consistent over time until 2h after onset of stroke. Our results demonstrate that this new NOE(-1.6) signal in rat brain is a new potential contrast for assessment of acute stroke in vivo and might provide broad applications in the detection of other abnormal tissues.

journal_name

Magn Reson Imaging

journal_title

Magnetic resonance imaging

authors

Zhang XY,Wang F,Afzal A,Xu J,Gore JC,Gochberg DF,Zu Z

doi

10.1016/j.mri.2016.05.002

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

1100-6

issue

8

eissn

0730-725X

issn

1873-5894

pii

S0730-725X(16)30048-0

journal_volume

34

pub_type

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