Evidence map›Paper›PMID 35430679›Full record

ArticleJapanese journal of radiology2022

Magnetic resonance temperature imaging of laser-induced thermotherapy using proton resonance frequency shift: evaluation of different sequences in phantom and porcine brain at 7 T.

Guojun Xu, Zhiyong Zhao, Kedi Xu, Junming Zhu, Anna W Roe, Bin Xu, Xiaotong Zhang, Jianqi Li, Dongrong Xu

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Article in Japanese journal of radiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

9 authors.

Guojun Xu *Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai, 200062, China.
Zhiyong Zhao *Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai, 200062, China.
Kedi XuQiushi Academy for Advanced Studies (QAAS), Zhejiang University, Hangzhou, 310027, China.
Junming ZhuNeurosurgery Department, The Second Affiliated Hospital of Zhejiang University, Hangzhou, 310006, China.
Anna W RoeInterdisciplinary Institute of Neuroscience and Technology, Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, 310029, China.
Bin XuInterdisciplinary Institute of Neuroscience and Technology, Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, 310029, China.
Xiaotong ZhangInterdisciplinary Institute of Neuroscience and Technology, Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, 310029, China.
Jianqi LiShanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai, 200062, China. jqli@phy.ecnu.edu.cn.
Dongrong XuMolecular Imaging and Neuropathology Division, Columbia University Department of Psychiatry and New York State Psychiatric Institute, 1051 Riverside Drive, Unit 42, New York, NY, 10032, USA. dx2103@columbia.edu.ORCID http://orcid.org/0000-0003-4682-1587

Funding

Fundamental Research Funds for the Central Universities No. 2016QN81018Key Technologies Research and Development Program 2017YFC1308502Key Technologies Research and Development Program No. 2017YFC1308500National Natural Science Foundation of China 61771423National Natural Science Foundation of China No. 81701774
6 · The paper itself

Abstract

purposeThe present study aimed to evaluate magnetic resonance (MR) thermometry using proton resonance frequency shift (PRFS) during laser-induced thermotherapy (LITT), and to compare the results of using different sequences at a field strength of 7-Tesla to identify the optimal for use in ablation so that the surrounding healthy tissues may be protected from damaging in real time. MATERIALS AND

methodsLITT was applied to agarose gel phantoms and ex-vivo porcine brains. We reconstructed both magnitude and phase images to perform MR thermometry based on PRFS methods. We tested four different sequences: a gradient-echo (GRE), a segmented gradient-echo echoplanar imaging (EPI-GRE), a fast-low angle shot (FLASH), and a true fast imaging with steady precession (TRUFI). Temperature was monitored and verified using a fiber-optic thermometry device.

resultsAll sequences showed good linear correlations (R = 0.97-0.99) between the measured temperature and the calculated MR-thermometry measurements. The phantom/porcine brain experiments revealed the temperature precisions at 1.53/0.69 °C (GRE), 0.61/0.43 °C (EPI-GRE), 1.64/1.32 °C (FLASH), and 0.58/1.52 °C (TRUFI), respectively. Furthermore, we performed a Bland-Altman analysis and the temperature accuracies were found to be - 1.32/- 0.60 °C (GRE), 0.42/- 0.33 °C (EPI-GRE), - 1.28/- 0.98 °C (FLASH), and 0.14/0.46 °C (TRUFI) in the phantom/porcine brain experiments, respectively.

conclusionsOur experiments recommend that EPI-GRE sequence be the best of the all sequences for MR temperature imaging with PRFS in the LITT on 7 T magnetic resonance imaging (MRI) systems because of its relatively higher precision and accuracy.

Indexed as

Hyperthermia, InducedProtonsAnimalsBrainLasersMagnetic Resonance ImagingMagnetic Resonance SpectroscopyPhantoms, ImagingSwineTemperatureProtons7 TLaser-induced thermotherapyMagnetic resonance imagingProton resonance frequency shiftThermometry

Identifiers

PMID35430679

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.