Volume 52, Issue 3 pp. 836-849
Original Research

Iron Sucrose as MRI Contrast Agent in Ischemic Stroke Model

Shiman Wu MD

Shiman Wu MD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Hua Zhang MD, PhD

Hua Zhang MD, PhD

Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China

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Jing Wang MD

Jing Wang MD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Xiaoyan Li MD

Xiaoyan Li MD

Department of General Surgery, Huashan Hospital, Fudan University, Shanghai, China

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Xinyi Gao MD

Xinyi Gao MD

Department of Radiology, Zhejiang Cancer Hospital, Hangzhou, China

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Ziwei Fang MD

Ziwei Fang MD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Jianxun Qu ME

Jianxun Qu ME

GE Healthcare, MR research, Applied Science Lab, Shanghai, China

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Yue Wu MD, PhD

Yue Wu MD, PhD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Yan Ren MD, PhD

Yan Ren MD, PhD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Wenting Rui MD

Wenting Rui MD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Junhai Zhang MD, PhD

Junhai Zhang MD, PhD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

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Zhenwei Yao MD, PhD

Corresponding Author

Zhenwei Yao MD, PhD

Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China

Shiman Wu and Hua Zhang are dual first author. Both of them both have contributed equally to this work.Address reprint requests to: Z. Y., 12 Middle Urumqi Road, Jing'an District, Shanghai, 200040, China. E-mail: [email protected]Search for more papers by this author
First published: 29 February 2020
Citations: 4

Abstract

Background

Despite the growing concern about the safety of gadolinium-based contrast agents (GBCAs), they are still the most commonly used. Ferumoxytol, as an off-label alternative MRI contrast agent, cannot be administered by a rapid bolus for dynamic susceptibility contrast perfusion-weighted imaging (DSC-PWI).

Purpose

To assess the feasibility of iron sucrose (IS) as a contrast agent for MR angiography (MRA) and DSC-PWI.

Study Type

Prospective animal model.

Animal Model

Thirty-six normal rats (16 for MRA, 20 for biocompability tests) and 36 occlusion of the middle cerebral artery (MCAO) model rats.

Field Strength/Sequence

3.0T; head and neck angiography, using a fast spoiled gradient-recalled-echo (FSPGR) sequence and DSC-MRI using echo planar imaging(EPI) sequence.

Assessment

MRA was performed on normal rats to examine the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of different doses of IS. DSC-PWI was performed on MCAO rats at 0, 24, 48, and 72 hours postreperfusion to investigate the lesion detectability of IS. Arterial spin labeling (ASL) and DSC-PWI enhanced by GBCAs were conducted on MCAO rats as controls.

Statistical Tests

Kruskal–Wallis test was used to compare qualitative assessment. One-way analysis of variance (ANOVA) was used to compare the parametric data. Pearson's r values were evaluated between relative cerebral blood flow(rCBF)-ASL, rCBF-DSCIS, and rCBF obtained from DSC-PWI enhanced by GBCA.

Results

The mean SNR and CNR of the common carotid artery at doses of 10 mg Fe/kg of IS were comparable with the standard dose of GBCAs (SNR: 68.04 ± 12.55 vs. 67.72 ± 14.66; CNR: 23.78 ± 7.21vs. 21.63 ± 6.83). In MCAO rat models, rCBF and relative cerebral blood volume (rCBV) of ipsilateral striatum declined (0.72 ± 0.14, 0.86 ± 0.11) with prolonged relative mean transit time (rMTT) and relative time-to-peak (rTTP) (1.27 ± 0.24, 1.07 ± 0.03) following occlusion. Hyperperfusion was observed in all rats at 48 and 72 hours postreperfusion, in 4/6 rats at 24 hours postreperfusion for IS-mediated DSC-PWI.

Data Conclusion

IS may be an effective contrast agent for both MRA and DSC-PWI in ischemic stroke models.

Level of Evidence

1

Technical Efficacy Stage

1 J. Magn. Reson. Imaging 2020;52:836–849.

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