肌肉骨骼磁共振成像重访-磁共振成像仪的特斯拉重要吗?

Simranjeet Kaur, B. Tins, N. Winn, K. Ganga
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引用次数: 0

摘要

磁共振成像(MRI)是研究全谱肌肉骨骼(MSK)疾病的首选方式,这使现代医学领域发生了革命性的变化。MRI是时间、空间和对比度分辨率之间的仔细相互作用,这为其提高诊断性能和价值奠定了基础。有很多方面可以提高图像质量和诊断性能,然而,在当前诊断范围内,3-Tesla的更高磁强度影响最大。然而,硬件和软件参数的各种进步,如多通道多相阵列线圈、先进的梯度系统和更好的后处理技术,也显著提高了1.5T扫描仪的图像质量。所有领先的制造商都提供具有3T更高场强的MRI系统,这些系统在最近的临床环境中越来越多地被使用。3T扫描具有更好的信噪比的优点,这转化为更好的空间和时间分辨率,并具有更快采集的附加优点。3T扫描的挑战包括更高的磁化率、化学位移和更高的射频能量沉积。在骨科植入物的情况下,这一点尤为重要,因为易感伪影增加了两倍,导致假体周围信号显著丢失、信号移位、空洞和堆积,以及光谱脂肪抑制失败。需要各种修改来最小化3T扫描仪处的伪影,以更好地利用由于以更高场强进行扫描而获得的改进的空间和对比度分辨率。这篇综述讨论了1.5和3T扫描仪的技术特征及其在MSK成像中的临床意义和诊断价值。
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Musculoskeletal magnetic resonance imaging revisited – Does tesla of magnetic resonance imaging machines matter?
The field of modern medical science has been revolutionized by magnetic resonance imaging (MRI) which is the preferred modality for the investigation of a whole spectrum of musculoskeletal (MSK) conditions. MRI is a careful interplay between the temporal, spatial, and contrast resolution which forms the foundation for its improved diagnostic performance and value. There are a lot of aspects that improve the image quality and diagnostic performance, however, a higher magnet strength of 3-Tesla has the biggest impact within the current diagnostic range. However various advancements in the hardware and software parameters such as multichannel multi-phased array coils, advanced gradient systems and better post processing techniques have significantly improved image quality at 1.5T scanners as well. All the leading manufacturers offer MRI systems with a higher field strength of 3T which are increasingly being used in recent clinical settings. Scanning at 3T has the advantage of a better signal-to-noise ratio which translates into better spatial and temporal resolution with the added advantage of faster acquisition. Challenges of 3T scanning include higher magnetic susceptibility, chemical shift, and higher radiofrequency energy deposition. This is particularly important in the presence of orthopedic implants because of the two-fold increase in susceptibility artifacts resulting in significant periprosthetic signal loss, signal displacements with voids and pileups, and failed spectral fat suppression. Various modifications are needed to minimize the artifacts at 3T scanners to better utilize the improved spatial and contrast resolution achieved as a result of scanning at a higher field strength. This review discusses the technical features of scanning at 1.5 and 3T scanners along with their clinical implications and diagnostic usefulness in MSK imaging.
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来源期刊
Journal of Arthroscopy and Joint Surgery
Journal of Arthroscopy and Joint Surgery Medicine-Orthopedics and Sports Medicine
CiteScore
0.60
自引率
0.00%
发文量
1
期刊介绍: Journal of Arthroscopy and Joint Surgery (JAJS) is committed to bring forth scientific manuscripts in the form of original research articles, current concept reviews, meta-analyses, case reports and letters to the editor. The focus of the Journal is to present wide-ranging, multi-disciplinary perspectives on the problems of the joints that are amenable with Arthroscopy and Arthroplasty. Though Arthroscopy and Arthroplasty entail surgical procedures, the Journal shall not restrict itself to these purely surgical procedures and will also encompass pharmacological, rehabilitative and physical measures that can prevent or postpone the execution of a surgical procedure. The Journal will also publish scientific research related to tissues other than joints that would ultimately have an effect on the joint function.
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