1
|
Moghiseh M, Searle E, Dixit D, Kim J, Dong YC, Cormode DP, Butler A, Gieseg SP. Spectral Photon-Counting CT Imaging of Gold Nanoparticle Labelled Monocytes for Detection of Atherosclerosis: A Preclinical Study. Diagnostics (Basel) 2023; 13:diagnostics13030499. [PMID: 36766602 PMCID: PMC9914700 DOI: 10.3390/diagnostics13030499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
A key process in the development of atherosclerotic plaques is the recruitment of monocytes into the artery wall. Using spectral photon-counting computed tomography we examine whether monocyte deposition within the artery wall of ApoE-/- mouse can be detected. Primary mouse monocytes were labelled by incubating them with 15 nm gold nanoparticles coated with 11-mercaptoundecanoic acid The monocyte uptake of the particle was confirmed by electron microscopy of the cells before injection into 6-week-old apolipoprotein E deficient (ApoE-/-) mouse that had been fed with the Western diet for 10 weeks. Four days following injection, the mouse was sacrificed and imaged using a MARS spectral photon counting computed tomography scanner with a spectral range of 7 to 120 KeV with five energy bins. Imaging analysis showed the presence of X-ray dense material within the mouse aortic arch which was consistent with the spectral characteristic of gold rather than calcium. The imaging is interpreted as showing the deposition of gold nanoparticles containing monocytes within the mouse aorta. The results of our study determined that spectral photon-counting computed tomography could provide quantitative information about gold nanoparticles labelled monocytes in voxels of 90 × 90 × 90 µm3. The imaging was consistent with previous micro-CT and electron microscopy of mice using the same nanoparticles. This study demonstrates that spectral photon-counting computed tomography, using a MARS small bore scanner, can detect a fundamental atherogenic process within mouse models of atherogenesis. The present study demonstrates the feasibility of spectral photon-counting computed tomography as an emerging molecular imaging modality to detect atherosclerotic disease.
Collapse
Affiliation(s)
- Mahdieh Moghiseh
- Department of Radiology, University of Otago, Christchurch 9016, New Zealand
- MARS Bioimaging Ltd., Christchurch 8041, New Zealand
- Correspondence: (M.M.); (S.P.G.)
| | - Emily Searle
- MARS Bioimaging Ltd., Christchurch 8041, New Zealand
- Free Radical Biochemistry Laboratory, School of Biological Sciences, University of Canterbury, Christchurch 8041, New Zealand
- Department of Physics and Astronomy, University of Canterbury, Christchurch 8041, New Zealand
| | - Devyani Dixit
- MARS Bioimaging Ltd., Christchurch 8041, New Zealand
- Free Radical Biochemistry Laboratory, School of Biological Sciences, University of Canterbury, Christchurch 8041, New Zealand
| | - Johoon Kim
- Departments of Radiology, Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yuxi C. Dong
- Departments of Radiology, Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - David P. Cormode
- Departments of Radiology, Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Anthony Butler
- Department of Radiology, University of Otago, Christchurch 9016, New Zealand
- MARS Bioimaging Ltd., Christchurch 8041, New Zealand
- Department of Physics and Astronomy, University of Canterbury, Christchurch 8041, New Zealand
- European Organization for Nuclear Research (CERN), 1211 Meyrin, Switzerland
| | - Steven P. Gieseg
- Department of Radiology, University of Otago, Christchurch 9016, New Zealand
- MARS Bioimaging Ltd., Christchurch 8041, New Zealand
- Free Radical Biochemistry Laboratory, School of Biological Sciences, University of Canterbury, Christchurch 8041, New Zealand
- European Organization for Nuclear Research (CERN), 1211 Meyrin, Switzerland
- Correspondence: (M.M.); (S.P.G.)
| | | |
Collapse
|
2
|
Fotaki A, Munoz C, Emanuel Y, Hua A, Bosio F, Kunze KP, Neji R, Masci PG, Botnar RM, Prieto C. Efficient non-contrast enhanced 3D Cartesian cardiovascular magnetic resonance angiography of the thoracic aorta in 3 min. J Cardiovasc Magn Reson 2022; 24:5. [PMID: 35000609 PMCID: PMC8744314 DOI: 10.1186/s12968-021-00839-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 12/15/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The application of cardiovascular magnetic resonance angiography (CMRA) for the assessment of thoracic aortic disease is often associated with prolonged and unpredictable acquisition times and residual motion artefacts. To overcome these limitations, we have integrated undersampled acquisition with image-based navigators and inline non-rigid motion correction to enable a free-breathing, contrast-free Cartesian CMRA framework for the visualization of the thoracic aorta in a short and predictable scan of 3 min. METHODS 35 patients with thoracic aortic disease (36 ± 13y, 14 female) were prospectively enrolled in this single-center study. The proposed 3D T2-prepared balanced steady state free precession (bSSFP) sequence with image-based navigator (iNAV) was compared to the clinical 3D T2-prepared bSSFP with diaphragmatic-navigator gating (dNAV), in terms of image acquisition time. Three cardiologists blinded to iNAV vs. dNAV acquisition, recorded image quality scores across four aortic segments and their overall diagnostic confidence. Contrast ratio (CR) and relative standard deviation (RSD) of signal intensity (SI) in the corresponding segments were estimated. Co-axial aortic dimensions in six landmarks were measured by two readers to evaluate the agreement between the two methods, along with inter-observer and intra-observer agreement. Kolmogorov-Smirnov test, Mann-Whitney U (MWU), Bland-Altman analysis (BAA), intraclass correlation coefficient (ICC) were used for statistical analysis. RESULTS The scan time for the iNAV-based approach was significantly shorter (3.1 ± 0.5 min vs. 12.0 ± 3.0 min for dNAV, P = 0.005). Reconstruction was performed inline in 3.0 ± 0.3 min. Diagnostic confidence was similar for the proposed iNAV versus dNAV for all three reviewers (Reviewer 1: 3.9 ± 0.3 vs. 3.8 ± 0.4, P = 0.7; Reviewer 2: 4.0 ± 0.2 vs. 3.9 ± 0.3, P = 0.4; Reviewer 3: 3.8 ± 0.4 vs. 3.7 ± 0.6, P = 0.3). The proposed method yielded higher image quality scores in terms of artefacts from respiratory motion, and non-diagnostic images due to signal inhomogeneity were observed less frequently. While the dNAV approach outperformed the iNAV method in the CR assessment, the iNAV sequence showed improved signal homogeneity along the entire thoracic aorta [RSD SI 5.1 (4.4, 6.5) vs. 6.5 (4.6, 8.6), P = 0.002]. BAA showed a mean difference of < 0.05 cm across the 6 landmarks between the two datasets. ICC showed excellent inter- and intra-observer reproducibility. CONCLUSIONS Thoracic aortic iNAV-based CMRA with fast acquisition (~ 3 min) and inline reconstruction (3 min) is proposed, resulting in high diagnostic confidence and reproducible aortic measurements.
Collapse
Affiliation(s)
- Anastasia Fotaki
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK.
| | - Camila Munoz
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
| | - Yaso Emanuel
- Department of Cardiology, NHS Foundation Trust, Guy's and St Thomas, London, UK
| | - Alina Hua
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
| | - Filippo Bosio
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
| | - Karl P Kunze
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
- MR Research Collaborations, Siemens Healthcare Limited, Frimley, UK
| | - Radhouene Neji
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
- MR Research Collaborations, Siemens Healthcare Limited, Frimley, UK
| | - Pier Giorgio Masci
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
- Department of Cardiology, NHS Foundation Trust, Guy's and St Thomas, London, UK
| | - René M Botnar
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Claudia Prieto
- Department of Biomedical Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, St Thomas' Hospital, 3rd Floor-Lambeth Wing, Westminster Bridge Road, London, SE1 7EH, UK
- Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| |
Collapse
|
3
|
Abstract
High-quality aortic imaging plays a central role in the management of patients with thoracic aortic aneurysm. Computed tomography angiography and magnetic resonance angiography are the most commonly used techniques for thoracic aortic aneurysm diagnosis and imaging surveillance, with each having unique strengths and limitations that should be weighed when deciding patient-specific applications. To ensure optimal patient care, imagers must be familiar with potential sources of artifact and measurement error, and dedicate effort to ensure high-quality and reproducible aortic measurements are generated. This review summarizes the imaging evaluation and underlying pathology relevant to the diagnosis of thoracic aortic aneurysm.
Collapse
Affiliation(s)
- Kimberly G Kallianos
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Avenue, M-391, San Francisco, CA 94143-0628, USA
| | - Nicholas S Burris
- University of Michigan, Frankel Cardiovascular Center, Room 5588, 1500 East Medical Center Drive, Ann Arbor, MI 48109-5868, USA.
| |
Collapse
|
4
|
Berhane H, Scott M, Elbaz M, Jarvis K, McCarthy P, Carr J, Malaisrie C, Avery R, Barker AJ, Robinson JD, Rigsby CK, Markl M. Fully automated 3D aortic segmentation of 4D flow MRI for hemodynamic analysis using deep learning. Magn Reson Med 2020; 84:2204-2218. [PMID: 32167203 DOI: 10.1002/mrm.28257] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/18/2020] [Accepted: 02/24/2020] [Indexed: 12/18/2022]
Abstract
PURPOSE To generate fully automated and fast 4D-flow MRI-based 3D segmentations of the aorta using deep learning for reproducible quantification of aortic flow, peak velocity, and dimensions. METHODS A total of 1018 subjects with aortic 4D-flow MRI (528 with bicuspid aortic valve, 376 with tricuspid aortic valve and aortic dilation, 114 healthy controls) comprised the data set. A convolutional neural network was trained to generate 3D aortic segmentations from 4D-flow data. Manual segmentations served as the ground truth (N = 499 training, N = 101 validation, N = 418 testing). Dice scores, Hausdorff distance, and average symmetrical surface distance were calculated to assess performance. Aortic flow, peak velocity, and lumen dimensions were quantified at the ascending, arch, and descending aorta and compared using Bland-Altman analysis. Interobserver variability of manual analysis was assessed on a subset of 40. RESULTS Convolutional neural network segmentation required 0.438 ± 0.355 seconds versus 630 ± 254 seconds for manual analysis and demonstrated excellent performance with a median Dice score of 0.951 (0.930-0.966), Hausdorff distance of 2.80 (2.13-4.35), and average symmetrical surface distance of 0.176 (0.119-0.290). Excellent agreement was found for flow, peak velocity, and dimensions with low bias and limits of agreement less than 10% difference versus manual analysis. For aortic volume, limits of agreement were moderate within 16.3%. Interobserver variability (median Dice score: 0.950; Hausdorff distance: 2.45; and average symmetrical surface distance: 0.145) and convolutional neural network-based analysis (median Dice score: 0.953-0.959; Hausdorff distance: 2.24-2.91; and average symmetrical surface distance: 0.145-1.98 to observers) demonstrated similar reproducibility. CONCLUSIONS Deep learning enabled fast and automated 3D aortic segmentation from 4D-flow MRI, demonstrating its potential for efficient clinical workflows. Future studies should investigate its utility for other vasculature and multivendor applications.
Collapse
Affiliation(s)
- Haben Berhane
- Department of Medical Imaging, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Michael Scott
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois.,Department of Radiology, Northwestern University, Chicago, Illinois
| | - Mohammed Elbaz
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois.,Department of Radiology, Northwestern University, Chicago, Illinois
| | - Kelly Jarvis
- Department of Radiology, Northwestern University, Chicago, Illinois
| | - Patrick McCarthy
- Divison of Cardiac Surgery, Northwestern University, Chicago, Illinois
| | - James Carr
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois
| | - Chris Malaisrie
- Department of Radiology, Northwestern University, Chicago, Illinois
| | - Ryan Avery
- Department of Radiology, Northwestern University, Chicago, Illinois
| | - Alex J Barker
- Anschutz Medical Campus, University of Colorado, Aurora, Colorado
| | - Joshua D Robinson
- Department of Medical Imaging, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Cynthia K Rigsby
- Department of Medical Imaging, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Michael Markl
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois.,Department of Radiology, Northwestern University, Chicago, Illinois
| |
Collapse
|
5
|
Ando T, Kobayashi T, Endo H, Nagata T, Ono H, Suzuki T, Murakami H, Chikada M, Makuuchi H. Surgical treatment or conservative therapy for stanford type a acute aortic dissection with a thrombosed false lumen. Ann Vasc Dis 2012; 5:428-34. [PMID: 23641265 PMCID: PMC3641541 DOI: 10.3400/avd.oa.12.00021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 07/30/2012] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Optimum treatment for acute aortic dissection (AAD) with a thrombosed false lumen (thrombosed AAD) remains controversial. We evaluated the outcome of thrombosed AAD according to treatment strategy. MATERIALS AND METHODS We examined 280 patients with AAD, of which 30 had thrombosed AAD. We compared computed tomography findings, cardiac performance, and clinical course in 28 of these patients. Patients were divided into three groups for the comparison: Group E (emergency surgery), Group C (conservative therapy), and Group S (conservative therapy switched to emergency surgery). RESULTS In Group E (n = 13), one patient died and 12 survived. In Group C (n = 10), all patients were discharged, of which two died of cancer and two of the remaining eight survivors underwent subsequent elective surgery. In Group S (n = 5), one patient died and four survived following surgery. CONCLUSIONS It was hard to predict re-dissection or rupture following conservative treatment for thrombosed AAD. Basically, we should perform emergency surgery following the diagnosis of thrombosed AAD, particularly in complicated cases such as those with pericardial effusion, tamponade, and large aorta. Conservative therapy has a very limited application in patients with the initial stages of thrombosed AAD.
Collapse
Affiliation(s)
- Takashi Ando
- Department of Cardiovascular Surgery, St. Marianna University School of Medicine, Kawasaki, Kanagawa, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|