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Kochman J, Tomaniak M, Kołtowski Ł, Jąkała J, Proniewska K, Legutko J, Roleder T, Pietrasik A, Rdzanek A, Kochman W, Brugaletta S, Kaluza GL. A 12-month angiographic and optical coherence tomography follow-up after bioresorbable vascular scaffold implantation in patients with ST-segment elevation myocardial infarction. Catheter Cardiovasc Interv 2015; 86:E180-9. [PMID: 26015294 DOI: 10.1002/ccd.26006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 03/14/2015] [Accepted: 04/11/2015] [Indexed: 11/08/2022]
Abstract
OBJECTIVES The aim of the study was to evaluate the healing process at 12 months after ABSORB™ bioresorbable vascular scaffold (BVS) implantation in patients with ST-segment elevation myocardial infarction (STEMI). BACKGROUND There is currently no data on long-term BVS performance in the acute thrombotic setting. The underlying altered plaque pathomorphology may impact the neointima healing pattern, potentially making it different to that observed in stable coronary artery disease (CAD). METHODS We have performed an angiographic and optical coherence tomography (OCT) 12-month follow-up of 19 STEMI patients who were treated with a BVS implantation (23 scaffolds). An independent core laboratory performed a paired analysis of the corresponding frames at baseline and follow-up. RESULTS At 12 months, the OCT follow-up showed a decrease in the mean lumen area (8.29 ± 1.53 mm(2) vs. 6.82 ± 1.57 mm(2) , P < 0.001), but no significant change in the mean scaffold area (8.49 ± 1.53 mm(2) vs. 8.90 ± 1.51 mm(2) ). Significant decreases in malapposed strut ratio (4.9 ± 8.65% vs. 0.4 ± 1.55%, P < 0.001) and malapposition area (0.29 ± 0.60 mm(2) 0.08 ± 0.32 mm(2) , P = 0.002) were observed. A nonhomogenous proliferation of neointima was revealed with a symmetry index of 0.15 (0.08-0.27), a mean neointima thickness of 203 μm (183-249) and mean neointima area of 2.07 ± 0.51 mm(2) . The quantitative coronary angiography showed late lumen loss of 0.08 ± 0.23 mm and no significant change in the minimal lumen diameter (P = 0.11). There were no major adverse cardiovascular events (MACE), except for one nontarget vessel revascularization. CONCLUSIONS The OCT revealed a favorable healing pattern after BVS implantation in a STEMI population.
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Affiliation(s)
- Janusz Kochman
- 1st Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Mariusz Tomaniak
- 1st Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Łukasz Kołtowski
- 1st Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Jacek Jąkała
- Krakow Cardiovascular Research Institute, Krakow, Poland
| | | | - Jacek Legutko
- Institute of Cardiology, Jagiellonian University Medical College, Krakow, Poland
| | - Tomasz Roleder
- Krakow Cardiovascular Research Institute, Krakow, Poland
| | | | - Adam Rdzanek
- 1st Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Wacław Kochman
- Faculty of Health Sciences, Medical University of Gdansk, Gdansk, Poland
| | - Salvatore Brugaletta
- Department of Cardiology, Thorax Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain
| | - Grzegorz L Kaluza
- Department of Cardiology, Thorax Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain
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Pang J, Zhang Z, Zheng TZ, Bassig BA, Ge J, Yang YJ, Bai M, Peng Y. The analysis of related factors of ventricular aneurysm formation in patients with acute myocardial infarction in northwest of China. Int J Cardiol 2014; 181:50-2. [PMID: 25481315 DOI: 10.1016/j.ijcard.2014.12.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 12/01/2014] [Indexed: 11/17/2022]
Affiliation(s)
- Jun Pang
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China; Yale School of Public Health, Yale University, USA
| | - Zheng Zhang
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China.
| | | | | | - Junbo Ge
- Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yue-jin Yang
- Fu Wai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ming Bai
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
| | - Yu Peng
- Department of Cardiology, The First Hospital of Lanzhou University, Lanzhou, China
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Mitsuba N, Teragawa H, Hata T, Nishioka K, Fujii Y, Mikami S, Fujimura N, Maruhashi T, Kurisu S, Kihara Y. Deep echo attenuation without calcification increases the risk of periprocedural myonecrosis after elective percutaneous coronary intervention in patients with coronary artery disease. Intern Med 2012; 51:691-8. [PMID: 22466822 DOI: 10.2169/internalmedicine.51.6732] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE To investigate the clinical factors, including intravascular ultrasound (IVUS) findings, associated with percutaneous coronary intervention (PCI)-related periprocedural myonecrosis (PM) in patients with stable coronary artery disease (CAD). METHODS The study included 46 patients (mean age 65±2 y, 37 men) with stable CAD who underwent elective PCI using IVUS and a Doppler flow guidewire. In addition to routine IVUS measurements, the presence of deep echo attenuation (DEA) without calcification was assessed. The sum of all high-intensity transient signals (HITS) after a balloon deflation procedure was calculated using a Doppler flow guidewire. PM was defined as an elevation in troponin T to >0.03 ng/mL 24-hour after PCI. Patients were divided into 2 groups on the basis of the presence or absence of PM. RESULTS PM was identified in 17 patients (37%). Estimated glomerular filtration ratio was lower in the PM group (p=0.021). Target vessel distribution was different between the groups (p=0.004). Positive remodeling and DEA, as observed on IVUS, were more common in the PM group (p=0.03 and p<0.0001, respectively). The total number of HITS was higher in the PM group (p=0.003). Logistic regression analysis demonstrated that the presence of DEA (p=0.003) was the sole factor associated with the occurrence of PM. CONCLUSION These results demonstrated that DEA is an important factor associated with PM in patients who underwent an elective PCI. Therefore, IVUS to determine the presence of DEA should be performed before PCI.
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Affiliation(s)
- Naoya Mitsuba
- Department of Cardiovascular Medicine, Hiroshima University Graduate School of Biomedical Sciences, Japan
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Progressive Visualization of Losslessly Compressed DICOM Files Over the Internet. J Med Syst 2011; 36:1927-33. [PMID: 21243409 DOI: 10.1007/s10916-011-9652-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 01/04/2011] [Indexed: 10/18/2022]
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Costa C, Oliveira JL, Silva A, Ribeiro VG, Ribeiro J. Design, development, exploitation and assessment of a Cardiology Web PACS. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2009; 93:273-282. [PMID: 19117637 DOI: 10.1016/j.cmpb.2008.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2008] [Revised: 10/30/2008] [Accepted: 10/30/2008] [Indexed: 05/27/2023]
Abstract
Healthcare institutions are increasingly turning to digital medical imaging systems to promote better diagnosis and treatment of their patients. The implementation of the Picture Archiving and Communication System (PACS) clearly contributes to an increase in the productivity of health professionals. However, despite the amount of research that has been done in the past two decades, there are still several technological hurdles that hinder the wide adoption of PACS in the Web environment. In this paper, we present a Web-enabled PACS that through the inclusion of several DICOM services and compression methods promotes medical image availability and greater accessibility to users.
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Affiliation(s)
- Carlos Costa
- University of Aveiro-DETI/IEETA, Aveiro, Portugal.
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Dual source computed tomography: automated, visual or dual analysis? Int J Cardiovasc Imaging 2008; 25:205-8. [PMID: 19037747 DOI: 10.1007/s10554-008-9391-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2008] [Accepted: 11/09/2008] [Indexed: 10/21/2022]
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Costa C, Silva A, Oliveira JL. Current Perspectives on PACS and a Cardiology Case Study. ADVANCED COMPUTATIONAL INTELLIGENCE PARADIGMS IN HEALTHCARE-2 2007. [DOI: 10.1007/978-3-540-72375-2_5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ko JP, Chang J, Bomsztyk E, Babb JS, Naidich DP, Rusinek H. Effect of CT image compression on computer-assisted lung nodule volume measurement. Radiology 2005; 237:83-8. [PMID: 16126923 PMCID: PMC2359728 DOI: 10.1148/radiol.2371041079] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To evaluate the effect of two-dimensional wavelet-based computed tomographic (CT) image compression according to the Joint Photographic Experts Group (JPEG) 2000 standard on computer-assisted assessment of nodule volume. MATERIALS AND METHODS This HIPAA-compliant study was approved by the research board at the authors' institution; patients' informed consent was not required. Fifty-one nodules in 23 patients (seven men, 16 women; mean age, 59 years; age range, 39-75 years) were selected on low-dose CT scans that were compressed to levels of 10:1, 20:1, 30:1, and 40:1 by using a two-dimensional JPEG 2000 wavelet-based image compression method. Nodules were classified according to size (< or = 5 mm or > 5 mm in diameter), location (central, peripheral, or abutting pleura or fissures), and attenuation (solid, calcified, or subsolid). Regions of interest were placed on the original images and transposed onto compressed images. Nodule volumes on original (noncompressed) and compressed images were measured by using a computer-assisted method. A mixed-model analysis of variance was conducted for statistical evaluation. RESULTS Nodule volumes averaged 388.1 mm3 (range, 34-3474 mm3). There were three calcified, 33 solid noncalcified, and 15 subsolid nodules (13 with ground-glass attenuation). Average volume decreased with increasing compression level, to 383 mm3 (10:1), 370 mm3 (20:1), 360 mm3 (30:1), and 354 mm3 (40:1). No significant difference was identified between measurements obtained on original images and those compressed to a level of 10:1. Significant differences were noted, however, between original images and those compressed to a level of 20:1 or greater (P < .05). Compression level significantly interacted with nodule size, location, and attenuation (P < .001). The effect of compression was greater for nodules with ground-glass attenuation than for those with higher attenuation values. The difference in mean volumes between original images and those compressed to a level of 20:1 was 34.9 mm3 for nodules with ground-glass attenuation, compared with 8.3 mm3 for higher-attenuation nodules, a 4.2-fold difference. CONCLUSION Nodule volumes measured on images compressed to a level of 20:1 differed significantly from those measured on noncompressed images, especially for nodules with ground-glass attenuation. This difference could affect the assessment of nodule change in size as measured with computer-assisted methods.
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Affiliation(s)
- Jane P Ko
- Thoracic Imaging Section, Department of Radiology, New York University Medical Center, 560 First Ave, New York, NY 10016, USA.
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Tuinenburg JC, Koning G, Hekking E, Desjardins C, Harel F, Bilodeau L, van Weert AWM, Lespérance J, Reiber JHC. One core laboratory at two international sites, is that feasible? An inter-core laboratory and intra-observer variability study. Catheter Cardiovasc Interv 2002; 56:333-40. [PMID: 12112885 DOI: 10.1002/ccd.10189] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
To assess the magnitude of differences in QCA outcomes between two cooperating core laboratories in a single trial, we have carried out an inter-core laboratory variability study. Two QCA experts at the Montreal Heart Institute and Heart Core Leiden both analyzed 32 lesions (pre- and post-intervention) in accordance with previously agreed upon standard operating procedures. One of the experts analyzed the whole image set twice to determine the intraobserver variability. The inter-core laboratory differences in the acute gain (n = 31 pairs) are non-significant. The systematic errors of the individual measurements (n = 63 analyses) show an excellent intraclass correlation coefficient of reliability (>75%), except for the stent length (67.7%). The corresponding random errors are small. In general, the intra-observer systematic and random errors are both slightly smaller than those for the inter-core laboratory study. QCA analyses in clinical trials can be carried out in core laboratories at two different locations if and only if highly standardized conditions are maintained.
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Affiliation(s)
- Joan C Tuinenburg
- Division of Image Processing (LKEB), Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
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Ribaric S, Todorovski L, Dimec J, Lunder T. Presentation of dermatological images on the Internet. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2001; 65:111-121. [PMID: 11275331 DOI: 10.1016/s0169-2607(00)00118-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this paper, we focused on selected problems of integrating and presenting medical images organised in a World Wide Web (WWW) database. To solve these problems we developed a prototype of a bilingual (Slovenian and English) WWW database of medical images for the field of dermatology. This dermatology database includes a graphic interface with four modes of access: (1) browsing, (2) searching, (3) comparison of images, and (4) self-testing. The quantity and quality of requests to this WWW database was estimated with log file analysis. There was a steady increase in the number of users and volume of data transferred from the dermatology WWW database.
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Affiliation(s)
- S Ribaric
- Institute of Pathophysiology, Medical Faculty, Zaloska 4, SI-1000, Ljubljana, Slovenia. .-lj.si
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Brennecke R, Bürgel U, Rippin G, Post F, Rupprecht HJ, Meyer J. Comparison of image compression viability for lossy and lossless JPEG and Wavelet data reduction in coronary angiography. Int J Cardiovasc Imaging 2001; 17:1-12. [PMID: 11495503 DOI: 10.1023/a:1010644318298] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Lossless or lossy compression of coronary angiogram data can reduce the enormous amounts of data generated by coronary angiographic imaging. The recent International Study of Angiographic Data Compression (ISAC) assessed the clinical viability of lossy Joint Photographic Expert Group (JPEG) compression but was unable to resolve two related questions: (A) the performance of lossless modes of compression in coronary angiography and (B) the performance of newer lossy wavelet algorithms. This present study seeks to supply some of this information. METHODS The performance of several lossless image compression methods was measured in the same set of images as used in the ISAC study. For the assessment of the relative image quality of lossy JPEG and wavelet compression, the observers ranked the perceived image quality of computer-generated coronary angiograms compressed with wavelet compression relative to the same images with JPEG compression. This ranking allowed the matching of compression ratios for wavelet compression with the clinically viable compression ratios for the JPEG method as obtained in the ISAC study. RESULTS The best lossless compression scheme (LOCO-I) offered a mean compression ratio (CR) of 3.80:1. The quality of images compressed with the lossy wavelet-based method at CR = 10:1 and 20:1 was comparable to JPEG compression at CR = 6:1 and 10:1, respectively. CONCLUSION The study has shown that lossless compression can exceed the CR of 2:1 usually quoted. For lossy compression, the range of clinically viable compression ratios can probably be extended by 50 to 100% when applying wavelet compression algorithms as compared to JPEG compression. These results can motivate a larger clinical study.
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Affiliation(s)
- R Brennecke
- II Medical Clinic, Johannes-Gutenberg-University, Mainz, Germany.
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Brennecke R, Bürgel U, Simon R, Rippin G, Fritsch HP, Becker T, Nissen SE. American College of Cardiology/European Society of Cardiology International Study of Angiographic Data Compression Phase III: measurement of image quality differences at varying levels of data compression. J Am Coll Cardiol 2000; 35:1388-97. [PMID: 10758989 DOI: 10.1016/s0735-1097(99)00655-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES We sought to investigate up to which level of Joint Photographic Experts Group JPEG) data compression the perceived image quality and the detection of diagnostic features remain equivalent to the quality and detectability found in uncompressed coronary angiograms. BACKGROUND Digital coronary angiograms represent an enormous amount of data and therefore require costly computerized communication and archiving systems. Earlier studies on the viability of medical image compression were not fully conclusive. METHODS Twenty-one raters evaluated sets of 91 cine runs. Uncompressed and compressed versions of the images were presented side by side on one monitor, and image quality differences were assessed on a scale featuring six scores. In addition, the raters had to detect pre-defined clinical features. Compression ratios (CR) were 6:1, 10:1 and 16:1. Statistical evaluation was based on descriptive statistics and on the equivalence t-test. RESULTS At the lowest CR (CR 6:1), there was already a small (15%) increase in assigning the aesthetic quality score indicating "quality difference is barely discernible-the images are equivalent." At CR 10:1 and CR 16:1, close to 10% and 55%, respectively, of the compressed images were rated to be "clearly degraded, but still adequate for clinical use" or worse. Concerning diagnostic features, at CR 10:1 and CR 16:1 the error rate was 9.6% and 13.1%, respectively, compared with 9% for the baseline error rate in uncompressed images. CONCLUSIONS Compression at CR 6:1 provides equivalence with the original cine runs. If CR 16:1 were used, one would have to tolerate a significant increase in the diagnostic error rate over the baseline error rate. At CR 10:1, intermediate results were obtained.
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Affiliation(s)
- R Brennecke
- II Medical Clinic, Johannes-Gutenberg-University Mainz, Germany.
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Nissen SE, Hirshfeld JW, Simon R. Introduction and background: the International Angiographic Compression study. J Am Coll Cardiol 2000; 35:1367-9. [PMID: 10758986 DOI: 10.1016/s0735-1097(00)00544-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S E Nissen
- Cleveland Clinic Foundation, Department of Cardiology, Ohio, USA
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