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Phenocopying Glioblastoma: A Review 表型胶质母细胞瘤:综述
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-09-10 DOI: 10.1109/RBME.2021.3111744
Mariam-Eleni Oraiopoulou;Eleftheria Tzamali;Joseph Papamatheakis;Vangelis Sakkalis
The main reason why therapeutic schemes fail in Glioblastoma lies on its own peculiarities as a cancer and on our failure to fully decipher them. Fast tumor evolution, invasiveness and incomplete surgical resection contribute to disease recurrence, therapy resistance and high mortality. More faithful models must be developed to address Glioblastoma biology and better clinical guidance. Research studies are discussed in this review that: i) improve understanding and assessment of the growth mechanisms of Glioblastoma and ii) develop preclinical models (in vitro-in vivo-in silico) that mimic patient's tumor (phenocopying) in order to provide better prediction of response to therapies.
胶质母细胞瘤治疗方案失败的主要原因在于其作为癌症的独特性,以及我们未能完全解读它们。肿瘤的快速演变、侵袭性和不完全的手术切除会导致疾病复发、治疗耐药性和高死亡率。必须开发更可靠的模型来解决胶质母细胞瘤的生物学问题和更好的临床指导。本综述讨论了以下研究:i)提高对胶质母细胞瘤生长机制的理解和评估,ii)开发模拟患者肿瘤的临床前模型(体外-体内-计算机模拟)(表型复制),以便更好地预测对治疗的反应。
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引用次数: 3
Retinal OCT Image Registration: Methods and Applications 视网膜OCT图像配准方法及应用
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-09-08 DOI: 10.1109/RBME.2021.3110958
Lingjiao Pan;Xinjian Chen
Retinal image registration is a critical task in the diagnosis and treatment of various eye diseases. And as a relatively new imaging method, optical coherence tomography (OCT) has been widely used in the diagnosis of retinal diseases. This paper is devoted to retinal OCT image registration methods and their clinical applications. Registration methods including volumetric transformation-based registration methods and image features-based registration methods are systematically reviewed. Furthermore, to better understanding these methods, their applications in correcting scanning artifacts, reducing speckle noise, fusing and splicing images and evaluating longitudinal disease progression are studied as well. At the end of this paper, registration of retina with serious pathology and registration with deep learning technique are also discussed.
视网膜图像配准是诊断和治疗各种眼病的关键任务。光学相干断层扫描(OCT)作为一种相对较新的成像方法,已被广泛应用于视网膜疾病的诊断。本文主要研究视网膜OCT图像配准方法及其临床应用。系统地综述了基于体积变换的配准方法和基于图像特征的配准方法。此外,为了更好地理解这些方法,还研究了它们在校正扫描伪影、减少斑点噪声、融合和拼接图像以及评估纵向疾病进展方面的应用。本文最后还讨论了严重病变视网膜的配准和深度学习技术的配准。
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引用次数: 9
Noninvasive Continuous Blood Pressure Estimation From Pulse Transit Time: A Review of the Calibration Models 基于脉冲传输时间的无创连续血压估计:校准模型综述
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-09-06 DOI: 10.1109/RBME.2021.3109643
Daniel Barvik;Martin Cerny;Marek Penhaker;Norbert Noury
Noninvasive continuous blood pressure estimation is a promising alternative to minimally invasive blood pressure measurement using cuff and invasive catheter measurement, because it opens the way to both long-term and continuous blood pressure monitoring in ecological situation. The most current estimation algorithm is based on pulse transit time measurement where at least two measured signals need to be acquired. From the pulse transit time values, it is possible to estimate the continuous blood pressure for each cardiac cycle. This measurement highly depends on arterial properties which are not easily accessible with common measurement techniques; but these properties are needed as input for the estimation algorithm. With every change of input arterial properties, the error in the blood pressure estimation rises, thus a periodic calibration procedure is needed for error minimization. Recent research is focused on simplified constant arterial properties which are not constant over time and uses only linear model based on initial measurement. The elaboration of continuous calibration procedures, independent of recalibration measurement, is the key to improving the accuracy and robustness of noninvasive continuous blood pressure estimation. However, most models in literature are based on linear approximation and we discuss here the need for more complete calibration models.
无创连续血压估计是使用袖带和有创导管测量的微创血压测量的一种很有前途的替代方法,因为它为生态环境下的长期和连续血压监测开辟了道路。最新的估计算法基于脉冲渡越时间测量,其中需要获取至少两个测量信号。根据脉冲传输时间值,可以估计每个心动周期的连续血压。这种测量高度依赖于动脉特性,而这些特性用普通的测量技术是不容易获得的;但是需要这些特性作为估计算法的输入。随着输入动脉特性的每次变化,血压估计中的误差都会上升,因此需要定期校准程序来最小化误差。最近的研究集中在简化的恒定动脉特性上,这些特性不是随时间恒定的,并且仅使用基于初始测量的线性模型。制定独立于重新校准测量的连续校准程序是提高无创连续血压估计准确性和稳健性的关键。然而,文献中的大多数模型都是基于线性近似的,我们在这里讨论了对更完整校准模型的需求。
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引用次数: 30
A Review of Neuroimaging-Driven Brain Age Estimation for Identification of Brain Disorders and Health Conditions 神经成像驱动的大脑年龄估计用于识别大脑疾病和健康状况的研究进展
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-08-24 DOI: 10.1109/RBME.2021.3107372
Shiwangi Mishra;Iman Beheshti;Pritee Khanna
Background: Neuroimage analysis has made it possible to perform various anatomical analyses of the brain regions and helps detect different brain conditions/ disorders. Recently, neuroimaging-driven estimation of brain age is introduced as a robust biomarker for detecting different diseases and health conditions. Objective: To present a comprehensive review of brain age frameworks concerning: i) designing view: an overview of brain age frameworks based on image modality and methods used, and ii) clinical aspect: an overview of the application of brain age frameworks for detection of neurological disorders or health conditions. Methods: PubMed is explored to collect 136 articles from January 2010 to June 2021 using “Brain Age Estimation” and “Brain Imaging,” along with combinations of other radiological terms. Results & Conclusion: The studies presented in this review are evidence of using brain age estimation methods in detecting various brain diseases/conditions. The survey also highlights tools and methods for brain age estimation and addresses some future research directions.
背景:神经图像分析使对大脑区域进行各种解剖分析成为可能,并有助于检测不同的大脑状况/障碍。最近,神经成像驱动的大脑年龄估计被引入,作为检测不同疾病和健康状况的强大生物标志物。目的:对脑年龄框架进行全面综述,内容包括:i)设计观点:基于图像模态和所用方法的脑年龄框架概述;以及ii)临床方面:脑年龄框架在检测神经系统疾病或健康状况方面的应用概述。方法:PubMed使用“大脑年龄估计”和“大脑成像”以及其他放射学术语的组合,收集了2010年1月至2021年6月的136篇文章。结果&;结论:本综述中的研究是使用脑年龄估计方法检测各种脑疾病/状况的证据。该调查还强调了大脑年龄估计的工具和方法,并提出了一些未来的研究方向。
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引用次数: 20
Noise Reduction in Cochlear Implant Signal Processing: A Review and Recent Developments 人工耳蜗信号处理中的降噪研究进展
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-07-07 DOI: 10.1109/RBME.2021.3095428
Fergal Henry;Martin Glavin;Edward Jones
Cochlear implant technology successfully restores hearing function to patients with sensory impairment. Although cochlear implant users generally hear well in quiet, they still find noisy conditions very challenging, hence the need to employ noise reduction algorithms in these systems to enhance the user experience. This paper reviews noise reduction algorithms in cochlear implants. Traditionally, such algorithms have been classified as either single- or multiple-channel, depending on the number of microphones they use. This review retains this general classification in looking at recent papers and extends it to reflect recent interest in machine learning techniques. The review concludes with consideration of promising future areas of research.
人工耳蜗植入技术成功地恢复了感觉障碍患者的听力功能。尽管人工耳蜗用户通常在安静的情况下听力良好,但他们仍然发现噪声条件非常具有挑战性,因此需要在这些系统中使用降噪算法来增强用户体验。本文综述了人工耳蜗的降噪算法。传统上,根据使用的麦克风数量,此类算法被分为单通道或多通道。这篇综述在查阅最近的论文时保留了这一一般分类,并对其进行了扩展,以反映最近对机器学习技术的兴趣。该综述最后考虑了有前景的未来研究领域。
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引用次数: 11
Multiphysics Computational Modelling of the Cardiac Ventricles 心室的多物理计算模型
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-06-29 DOI: 10.1109/RBME.2021.3093042
Azam Ahmad Bakir;Amr Al Abed;Nigel H. Lovell;Socrates Dokos
Development of cardiac multiphysics models has progressed significantly over the decades and simulations combining multiple physics interactions have become increasingly common. In this review, we summarise the progress in this field focusing on various approaches of integrating ventricular structures. electrophysiological properties, myocardial mechanics, as well as incorporating blood hemodynamics and the circulatory system. Common coupling approaches are discussed and compared, including the advantages and shortcomings of each. Currently used strategies for patient-specific implementations are highlighted and potential future improvements considered.
几十年来,心脏多物理模型的发展取得了显著进展,结合多种物理相互作用的模拟越来越普遍。在这篇综述中,我们总结了该领域的进展,重点是整合心室结构的各种方法。电生理特性、心肌力学以及血液血液动力学和循环系统。讨论并比较了常用的耦合方法,包括每种方法的优点和缺点。强调了目前用于患者特定实施的策略,并考虑了未来的潜在改进。
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引用次数: 2
Non-Invasive Methods for PWV Measurement in Blood Vessel Stiffness Assessment PWV无创测量方法在血管硬度评估中的应用
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-06-24 DOI: 10.1109/RBME.2021.3092208
Giorgia Fiori;Fabio Fuiano;Andrea Scorza;Silvia Conforto;Salvatore Andrea Sciuto
In recent years, statistical studies highlighted an increasing incidence of cardiovascular diseases (CVD) which reflected on additional costs on the healthcare systems worldwide. Pulse wave velocity (PWV) measurement is commonly considered a CVD predictor factor as well as a marker of Arterial Stiffness (AS) since it is closely related to the mechanical characteristics of the arterial wall. An increase in PWV is due to a more rigid arterial system. Because of the prevalence of the elastic component, in young people the PWV is lower than in the elderly. Nowadays, invasive and non-invasive methods for PWV assessment are employed: there is an increasing attention in the development of non-invasive devices which mostly perform a regional PWV measurement (over a long arterial portion) rather than local (over a short arterial portion). The accepted gold-standard for non-invasive AS measurement is the carotid-femoral PWV used to evaluate the arterial damage, the corresponding cardiovascular risk and to adapt the proper therapy. This review article considers the main commercially available devices underlining their operating principles in terms of sensors, execution mode, pulse waveforms acquired, site of measurement, distance and time estimation methods, as well as their main limitations in clinical practice.
近年来,统计研究强调了心血管疾病(CVD)发病率的增加,这反映了全球医疗系统的额外成本。脉搏波速度(PWV)测量通常被认为是CVD的预测因素,也是动脉硬度(as)的标志,因为它与动脉壁的机械特性密切相关。PWV的增加是由于动脉系统更加坚硬。由于弹性成分的普遍性,年轻人的PWV低于老年人。如今,PWV评估采用了有创和无创方法:无创设备的开发越来越受到关注,这些设备主要进行区域PWV测量(在长动脉部分),而不是局部测量(在短动脉部分)。公认的非侵入性AS测量的金标准是颈动脉-股骨PWV,用于评估动脉损伤、相应的心血管风险和适应适当的治疗。这篇综述文章考虑了主要的商用设备,强调了它们在传感器、执行模式、采集的脉冲波形、测量地点、距离和时间估计方法方面的工作原理,以及它们在临床实践中的主要局限性。
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引用次数: 16
CMOS Time-to-Digital Converters for Biomedical Imaging Applications 用于生物医学成像应用的CMOS时间数字转换器
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-06-24 DOI: 10.1109/RBME.2021.3092197
Ryan Scott;Wei Jiang;M. Jamal Deen
Time-to-digital converters (TDCs) are high-performance mixed-signal circuits capable of timestamping events with sub-gate delay resolution. As a result of their high-performance, in recent years TDCs were integrated in complementary metal-oxide-semiconductor (CMOS) technology with highly sensitive photodetectors known as single-photon avalanche diodes (SPADs), to form digital silicon photomultipliers (dSiPMs) and SPAD imagers. Time-resolved SPAD-based sensors are capable of detecting the absorption of a single photon and timestamping it with picosecond resolution. As such, SPAD-based sensors are very useful in the field of biomedical imaging, using time-of-flight (ToF) information to produce data that can be used to reconstruct high-quality biological images. Additionally, the capability of integration in standard CMOS technologies, allows SPAD-based sensors to provide high-performance, while maintaining low cost. In this paper, we present an overview of fundamental TDC principles, and an analysis of state-of-the-art TDCs. Furthermore, the integration of TDCs into dSiPMs and SPAD imagers will be discussed, with an analysis of the current results of TDCs in different biomedical imaging applications. Finally, several important research challenges for TDCs in biomedical imaging applications are presented.
时间-数字转换器(TDCs)是一种高性能的混合信号电路,能够以子门延迟分辨率对事件进行时间戳。由于其高性能,近年来,TDCs被集成在互补金属氧化物半导体(CMOS)技术中,与被称为单光子雪崩二极管(SPAD)的高灵敏度光电探测器集成,以形成数字硅光电倍增器(dSiPM)和SPAD成像器。基于时间分辨SPAD的传感器能够检测单个光子的吸收,并以皮秒分辨率对其进行时间戳。因此,基于SPAD的传感器在生物医学成像领域非常有用,它使用飞行时间(ToF)信息来产生可用于重建高质量生物图像的数据。此外,标准CMOS技术的集成能力使基于SPAD的传感器能够提供高性能,同时保持低成本。在本文中,我们概述了TDC的基本原理,并分析了最先进的TDC。此外,还将讨论将TDCs集成到dSiPM和SPAD成像器中,并分析TDCs在不同生物医学成像应用中的当前结果。最后,介绍了TDCs在生物医学成像应用中的几个重要研究挑战。
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引用次数: 5
A Systematic Review on Methods and Tools for the In Situ Fenestration of Aortic Stent-Graft 主动脉支架移植物原位开窗方法和工具的系统评价
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-06-01 DOI: 10.1109/RBME.2021.3085484
Roberta Piazza;M. Carbone;R. N. Berchiolli;V. Ferrari;M. Ferrari;S. Condino
In situ fenestration of stent-graft represents a potential option for the treatment of aortic diseases in patients unsuitable for standard endovascular repair. The best fenestration strategy to restore perfusion of collateral vessels after their coverage by an endograft depends mainly on the anatomical area. Several tools are employed as fenestration devices, including needles, radiofrequency probes, and laser systems, used in conjunction with other instrumentation to provide enough support and stability during the procedure. In this systematic review, the approaches to reach the correct fenestration site both in human, animal, and in in vitro environments are described and discussed, highlighting advantages and limitations. Both commercial and dedicated solutions for the intraoperative modification of the fabric material are reported as well. The clinical interest in this procedure has so far encouraged researchers to develop and refine both methods and tools to solve the current limitations of this technique, intending to extend the indications for endovascular treatment to a broader range of patients.
原位开窗支架移植物是治疗不适合标准血管内修复的主动脉疾病的一种潜在选择。内移植物覆盖侧支血管后,恢复侧支血管灌注的最佳开窗策略主要取决于解剖区域。有几种工具被用作开窗装置,包括针头、射频探头和激光系统,与其他仪器一起使用,以在手术过程中提供足够的支撑和稳定性。在这篇系统综述中,描述和讨论了在人类、动物和体外环境中达到正确开窗位置的方法,强调了优势和局限性。也报道了用于织物材料术中改性的商业和专用解决方案。到目前为止,对该手术的临床兴趣鼓励研究人员开发和完善方法和工具,以解决该技术目前的局限性,旨在将血管内治疗的适应症扩展到更广泛的患者。
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引用次数: 1
Deep Learning With Radiogenomics Towards Personalized Management of Gliomas 深度学习与放射基因组学实现胶质瘤的个性化管理
IF 17.6 1区 工程技术 Q1 ENGINEERING, BIOMEDICAL Pub Date : 2021-04-26 DOI: 10.1109/RBME.2021.3075500
Sushmita Mitra
A state-of-the-art interdisciplinary survey on multi-modal radiogenomic approaches is presented involving applications to the diagnosis and personalized management of gliomas a common kind of brain tumors through noninvasive imaging integrated with genomic information. It encompasses mining tumor radioimages employing deep learning for the automated extraction of relevant features from the segmented volume of interest (VOI). Gene expression values from surgically extracted tumor tissues are often simultaneously analyzed to determine patient specific features. Association between genomic and radiomic features are also explored in some cases to determine the imaging surrogates. Deep learning and transfer learning are typically exploited for efficient knowledge discovery and decision-making. Some studies on survival prediction ensemble learning and interactive learning are also included. The literature mainly focuses on magnetic resonance imaging (MRI) data of the brain for learning and validation and generally involves the NIH TCIA and TCGA repositories as well as the BraTS Challenge databases.
介绍了一项关于多模式放射基因组方法的最新跨学科调查,涉及通过整合基因组信息的非侵入性成像对胶质瘤(一种常见的脑肿瘤)的诊断和个性化管理的应用。它包括使用深度学习从感兴趣的分割体积(VOI)中自动提取相关特征来挖掘肿瘤放射性图像。通常同时分析来自手术提取的肿瘤组织的基因表达值,以确定患者的特异性特征。在某些情况下,还探索了基因组和放射组学特征之间的关联,以确定成像替代物。深度学习和迁移学习通常用于高效的知识发现和决策。还包括一些关于生存预测集成学习和交互式学习的研究。文献主要集中在用于学习和验证的大脑磁共振成像(MRI)数据上,通常涉及NIH TCIA和TCGA存储库以及BraTS Challenge数据库。
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引用次数: 2
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IEEE Reviews in Biomedical Engineering
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