Towards retrospective motion correction and reconstruction for clinical 3D brain MRI protocols with a reference contrast.

IF 2 4区 医学 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Gabrio Rizzuti, Tim Schakel, Niek R F Huttinga, Jan Willem Dankbaar, Tristan van Leeuwen, Alessandro Sbrizzi
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引用次数: 0

Abstract

Object: In a typical MR session, several contrasts are acquired. Due to the sequential nature of the data acquisition process, the patient may experience some discomfort at some point during the session, and start moving. Hence, it is quite common to have MR sessions where some contrasts are well-resolved, while other contrasts exhibit motion artifacts. Instead of repeating the scans that are corrupted by motion, we introduce a reference-guided retrospective motion correction scheme that takes advantage of the motion-free scans, based on a generalized rigid registration routine.

Materials and methods: We focus on various existing clinical 3D brain protocols at 1.5 Tesla MRI based on Cartesian sampling. Controlled experiments with three healthy volunteers and three levels of motion are performed.

Results: Radiological inspection confirms that the proposed method consistently ameliorates the corrupted scans. Furthermore, for the set of specific motion tests performed in this study, the quality indexes based on PSNR and SSIM shows only a modest decrease in correction quality as a function of motion complexity.

Discussion: While the results on controlled experiments are positive, future applications to patient data will ultimately clarify whether the proposed correction scheme satisfies the radiological requirements.

Abstract Image

为临床三维脑部磁共振成像方案的回溯运动校正和重建提供参考对比。
对象在一次典型的磁共振检查中,要采集多个对比度。由于数据采集过程的连续性,患者可能会在治疗过程中的某一时刻感到不适,并开始移动。因此,在磁共振扫描过程中,一些对比度分辨率较高,而另一些对比度则会出现运动伪影,这种情况十分常见。我们不需要重复扫描受运动干扰的图像,而是基于通用的刚性配准例程,引入一种参考引导的回溯运动校正方案,利用无运动的扫描图像:我们重点研究了各种基于笛卡尔采样的 1.5 特斯拉 MRI 临床三维脑成像方案。对三名健康志愿者和三种运动水平进行了对照实验:结果:放射学检查证实,所提出的方法能持续改善损坏的扫描结果。此外,对于本研究中进行的一组特定运动测试,基于 PSNR 和 SSIM 的质量指标显示,随着运动复杂度的增加,校正质量仅略有下降:尽管对照实验的结果是积极的,但未来在患者数据上的应用将最终明确所提出的校正方案是否满足放射学要求。
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来源期刊
CiteScore
4.60
自引率
0.00%
发文量
58
审稿时长
>12 weeks
期刊介绍: MAGMA is a multidisciplinary international journal devoted to the publication of articles on all aspects of magnetic resonance techniques and their applications in medicine and biology. MAGMA currently publishes research papers, reviews, letters to the editor, and commentaries, six times a year. The subject areas covered by MAGMA include: advances in materials, hardware and software in magnetic resonance technology, new developments and results in research and practical applications of magnetic resonance imaging and spectroscopy related to biology and medicine, study of animal models and intact cells using magnetic resonance, reports of clinical trials on humans and clinical validation of magnetic resonance protocols.
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