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Tan KA, Inderjeeth C, Jansen S. Potential for novel imaging techniques to monitor early disease progression in connective tissue disease vasculopathy. Intern Med J 2021; 51:1530-1534. [PMID: 34541763 DOI: 10.1111/imj.15476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/14/2021] [Indexed: 11/28/2022]
Abstract
Vasculopathy associated with connective tissue diseases (CTD) has diverse clinical presentations and complex underlying pathology. Existing imaging techniques remain inadequate for assessing vasculopathy in CTD, particularly in earlier stages of pathogenesis. Novel imaging techniques, such as optical coherence tomography, near-infrared spectroscopy and superb microvascular imaging, demonstrate potential in monitoring disease progression at earlier stages prior to systemic complications.
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Affiliation(s)
- Kah Aik Tan
- University of Western Australia, Perth, Western Australia, Australia.,Heart and Vascular Research Institute, Harry Perkins Medical Research Institute, Perth, Western Australia, Australia
| | - Charles Inderjeeth
- University of Western Australia, Perth, Western Australia, Australia.,Osborne Park Hospital, Perth, Western Australia, Australia.,Linear Clinical Research, Perth, Western Australia, Australia
| | - Shirley Jansen
- University of Western Australia, Perth, Western Australia, Australia.,Heart and Vascular Research Institute, Harry Perkins Medical Research Institute, Perth, Western Australia, Australia.,Curtin Medical School, Curtin University, Perth, Western Australia, Australia.,Department of Vascular and Endovascular Surgery, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
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Li N, Zhou S, Zhao G, Zhang Z, Xie Y, Liang X. Iterative stripe artifact correction framework for TOF-MRA. Comput Biol Med 2021; 134:104456. [PMID: 34010790 DOI: 10.1016/j.compbiomed.2021.104456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 11/26/2022]
Abstract
The purpose of this study is to develop a practical stripe artifacts correction framework on three-dimensional (3-D) time-of-flight magnetic resonance angiography (TOF-MRA) obtained by multiple overlapping thin slab acquisitions (MOTSA) technology. In this work, the stripe artifacts in TOF-MRA were considered as a part of image texture. To separate the image structure and the texture, the relative total variation (RTV) was firstly employed to smooth the TOF-MRA for generating the template image with fewer image textures. Then a residual image was generated, which was the difference between the template image and the raw TOF-MRA. The residual image was served as the image texture, which contained the image details and stripe artifacts. Then, we obtained the artifact image from the residual image via a filter in a specific direction since the image artifacts appeared as stripes. The image details were then produced from the difference between the artifact image and the image texture. To produce the corrected images, we finally compensated the image details to the RTV smoothing image. The proposed method was continued until the stripe artifacts during the iteration vary as little as possible. The digital phantom and the real patients' TOF-MRA were used to test the approach. The spatial uniformity was increased from 74% to 82% and the structural similarity was improved from 86% to 98% in the digital phantom test by using the proposed algorithm. Our approach proved to be highly successful in eliminating stripe artifacts in real patient data tests while retaining image details. The proposed iterative framework on TOF-MRA stripe artifact correction is effective and appealing for enhancing the imaging performance of multi-slab 3-D acquisitions.
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Affiliation(s)
- Na Li
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China; Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Shoujun Zhou
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China.
| | - Gang Zhao
- Neurosurgery Department, General Hospital of Southern Theatre Command, PLA, Guangzhou, Guangdong, 510010, China
| | - Zhicheng Zhang
- Department of Radiation Oncology, Stanford University, Stanford, CA, 94305, USA
| | - Yaoqin Xie
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China
| | - Xiaokun Liang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, 518055, China; Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China; Department of Radiation Oncology, Stanford University, Stanford, CA, 94305, USA.
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Oikonomou E, Tousoulis D. Editorial overview: Cardiovascular and renal: Novel therapies in peripheral artery disease. Curr Opin Pharmacol 2018; 39:iv-vi. [PMID: 29941177 DOI: 10.1016/j.coph.2018.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Evangelos Oikonomou
- Department of Cardiology, 'Hippokration' General Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece.
| | - Dimitris Tousoulis
- Department of Cardiology, 'Hippokration' General Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
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