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Cao JJ, Nashta NF, Weber J, Bano R, Passick M, Cheng YJ, Schapiro W, Grgas M, Gliganic K. Association of pulmonary transit time by cardiac magnetic resonance with heart failure hospitalization in a large prospective cohort with diverse cardiac conditions. J Cardiovasc Magn Reson 2023; 25:57. [PMID: 37821911 PMCID: PMC10568762 DOI: 10.1186/s12968-023-00963-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 09/13/2023] [Indexed: 10/13/2023] Open
Abstract
BACKGROUND Longer pulmonary transit time (PTT) is closely associated with hemodynamic abnormalities. However, the implications on heart failure (HF) risk have not been investigated broadly in patients with diverse cardiac conditions. In this study we examined the long-term risk of HF hospitalization associated with longer PTT in a large prospective cohort with a broad spectrum of cardiac conditions. METHODS All subjects were prospectively recruited to undergo cardiac magnetic resonance (CMR). The dynamic images of first-pass perfusion were acquired to assess peak-to-peak pulmonary transit time (PTT) which was subsequently normalized to RR interval duration. The risk of HF was examined using Cox proportional hazards models adjusted for baseline confounding risk factors. RESULTS Among 506 consecutively consented patients undergoing clinical cardiac MR with diverse cardiac conditions, the mean age was 63 ± 14 years and 373 (73%) were male. After a mean follow up duration of 4.5 ± 3.0 years, 70 (14%) patients developed hospitalized HF and of these 6 died. A normalized PTT ≥ 8.2 was associated with a significantly increased adjusted HF hazard ratio of 3.69 (95% CI 2.02, 6.73). The HF hazard ratio was 1.26 (95% CI 1.18, 1.33) for each 1 unit increase in PTT which was higher among those preserved (1.70, 95% CI 1.20, 2.41) compared to those with reduced left ventricular ejection fraction (< 50%) (1.18, 95% CI 1.09, 1.27). PTT remained a significant risk factor of hospitalized HF after additional adjustment for N-terminal pro-hormone brain natriuretic peptide (NT-proBNP) or left ventricular global longitudinal strain with additionally demonstrated incremental model improvement through likelihood ratio testing. CONCLUSIONS Our findings support the role of PTT in assessing HF risk among patients with broad spectrum of cardiac conditions with reduced as well as preserved ejection fraction. Longer PTT duration is an incremental risk factor for HF when baseline global longitudinal strain and NT-proBNP are taken into consideration.
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Affiliation(s)
- J Jane Cao
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA.
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA.
| | - Niloofar Fouladi Nashta
- Sol Price School of Public Policy and Leonard D. Schaeffer Center for Health Policy and Economics, University of Southern California, Los Angeles, CA, USA
| | - Jonathan Weber
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Ruqiyya Bano
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Michael Passick
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Y Joshua Cheng
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - William Schapiro
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
| | - Marie Grgas
- DeMatteis Cardiovascular Institute, St. Francis Hospital & Heart Center, Roslyn, NY, USA
| | - Kathleen Gliganic
- Division of Cardiac Imaging, St. Francis Hospital & Heart Center, 100 Port Washington Blvd., Roslyn, NY, 11576, USA
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Torres LA, Lee KE, Barton GP, Hahn AD, Sandbo N, Schiebler ML, Fain SB. Dynamic contrast enhanced MRI for the evaluation of lung perfusion in idiopathic pulmonary fibrosis. Eur Respir J 2022; 60:13993003.02058-2021. [PMID: 35273033 PMCID: PMC10015995 DOI: 10.1183/13993003.02058-2021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 02/24/2022] [Indexed: 11/05/2022]
Abstract
BACKGROUND The objective of this work was to apply quantitative and semiquantitative dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) methods to evaluate lung perfusion in idiopathic pulmonary fibrosis (IPF). METHODS In this prospective trial 41 subjects, including healthy control and IPF subjects, were studied using DCE-MRI at baseline. IPF subjects were then followed for 1 year; progressive IPF (IPFprog) subjects were distinguished from stable IPF (IPFstable) subjects based on a decline in percent predicted forced vital capacity (FVC % pred) or diffusing capacity of the lung for carbon monoxide (D LCO % pred) measured during follow-up visits. 35 out of 41 subjects were retained for final baseline analysis (control: n=15; IPFstable: n=14; IPFprog: n=6). Seven measures and their coefficients of variation (CV) were derived using temporally resolved DCE-MRI. Two sets of global and regional comparisons were made: control versus IPF groups and control versus IPFstable versus IPFprog groups, using linear regression analysis. Each measure was compared with FVC % pred, D LCO % pred and the lung clearance index (LCI % pred) using a Spearman rank correlation. RESULTS DCE-MRI identified regional perfusion differences between control and IPF subjects using first moment transit time (FMTT), contrast uptake slope and pulmonary blood flow (PBF) (p≤0.05), while global averages did not. FMTT was shorter for IPFprog compared with both IPFstable (p=0.004) and control groups (p=0.023). Correlations were observed between PBF CV and D LCO % pred (rs= -0.48, p=0.022) and LCI % pred (rs= +0.47, p=0.015). Significant group differences were detected in age (p<0.001), D LCO % pred (p<0.001), FVC % pred (p=0.001) and LCI % pred (p=0.007). CONCLUSIONS Global analysis obscures regional changes in pulmonary haemodynamics in IPF using DCE-MRI in IPF. Decreased FMTT may be a candidate marker for IPF progression.
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Affiliation(s)
- Luis A Torres
- Dept of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Kristine E Lee
- Dept of Biostatistics and Medical Informatics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Gregory P Barton
- Dept of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Andrew D Hahn
- Dept of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Nathan Sandbo
- Dept of Medicine, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Mark L Schiebler
- Dept of Medicine, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA.,Dept of Radiology, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Sean B Fain
- Dept of Medical Physics, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA .,Dept of Radiology, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA.,Dept of Biomedical Engineering, College of Engineering, University of Wisconsin - Madison, Madison, WI, USA.,Dept of Radiology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
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3
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Cottin V, Selman M, Inoue Y, Wong AW, Corte TJ, Flaherty KR, Han MK, Jacob J, Johannson KA, Kitaichi M, Lee JS, Agusti A, Antoniou KM, Bianchi P, Caro F, Florenzano M, Galvin L, Iwasawa T, Martinez FJ, Morgan RL, Myers JL, Nicholson AG, Occhipinti M, Poletti V, Salisbury ML, Sin DD, Sverzellati N, Tonia T, Valenzuela C, Ryerson CJ, Wells AU. Syndrome of Combined Pulmonary Fibrosis and Emphysema: An Official ATS/ERS/JRS/ALAT Research Statement. Am J Respir Crit Care Med 2022; 206:e7-e41. [PMID: 35969190 PMCID: PMC7615200 DOI: 10.1164/rccm.202206-1041st] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: The presence of emphysema is relatively common in patients with fibrotic interstitial lung disease. This has been designated combined pulmonary fibrosis and emphysema (CPFE). The lack of consensus over definitions and diagnostic criteria has limited CPFE research. Goals: The objectives of this task force were to review the terminology, definition, characteristics, pathophysiology, and research priorities of CPFE and to explore whether CPFE is a syndrome. Methods: This research statement was developed by a committee including 19 pulmonologists, 5 radiologists, 3 pathologists, 2 methodologists, and 2 patient representatives. The final document was supported by a focused systematic review that identified and summarized all recent publications related to CPFE. Results: This task force identified that patients with CPFE are predominantly male, with a history of smoking, severe dyspnea, relatively preserved airflow rates and lung volumes on spirometry, severely impaired DlCO, exertional hypoxemia, frequent pulmonary hypertension, and a dismal prognosis. The committee proposes to identify CPFE as a syndrome, given the clustering of pulmonary fibrosis and emphysema, shared pathogenetic pathways, unique considerations related to disease progression, increased risk of complications (pulmonary hypertension, lung cancer, and/or mortality), and implications for clinical trial design. There are varying features of interstitial lung disease and emphysema in CPFE. The committee offers a research definition and classification criteria and proposes that studies on CPFE include a comprehensive description of radiologic and, when available, pathological patterns, including some recently described patterns such as smoking-related interstitial fibrosis. Conclusions: This statement delineates the syndrome of CPFE and highlights research priorities.
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Affiliation(s)
- Vincent Cottin
- National Reference Center for Rare Pulmonary Diseases, Louis Pradel Hospital, Hospices Civils de Lyon, University of Lyon, INRAE, Lyon, France
| | - Moises Selman
- Instituto Nacional de Enfermedades Respiratorias “Ismael Cosío Villegas”, Mexico City, Mexico
| | | | | | - Tamera J. Corte
- Royal Prince Alfred Hospital and University of Sydney, Sydney, Australia
| | | | | | - Joseph Jacob
- University College London, London, United Kingdom
| | - Kerri A. Johannson
- Department of Medicine and Community Health Sciences, University of Calgary, Calgary, AB, Canada
| | | | - Joyce S. Lee
- University of Colorado Denver Anschutz Medical Campus, School of Medicine, Aurora, CO, USA
| | - Alvar Agusti
- Respiratory Institute, Hospital Clinic, University of Barcelona, IDIBAPS, CIBERES, Barcelona, Spain
| | - Katerina M. Antoniou
- Laboratory of Molecular and Cellular Pneumonology, Department of Respiratory Medicine, University of Crete, Heraklion, Greece
| | | | - Fabian Caro
- Hospital de Rehabilitación Respiratoria "María Ferrer", Buenos Aires, Argentina
| | | | - Liam Galvin
- European idiopathic pulmonary fibrosis and related disorders federation
| | - Tae Iwasawa
- Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
| | | | | | | | - Andrew G. Nicholson
- Royal Brompton and Harefield Hospitals, Guy’s and St Thomas’ NHS Foundation Trust and National Heart and Lung Institute, Imperial College, London, United Kingdom
| | | | | | | | - Don D. Sin
- University of British Columbia, Vancouver, Canada
| | - Nicola Sverzellati
- Scienze Radiologiche, Department of Medicine and Surgery, University of Parma, Italy
| | - Thomy Tonia
- Institute of Social and Preventive Medicine, University of Bern, Switzerland
| | - Claudia Valenzuela
- Pulmonology Department, Hospital Universitario de la Princesa, Departamento Medicina, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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4
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Baruah D, Sonavane S, Goodman L, Nath H, Presberg K, Shahir K. Correlation of Computed Tomography Test Bolus Dynamics and Conventional Computed Tomography Parameters With Pulmonary Vascular Resistance in Patients With Pulmonary Arterial Hypertension. Cureus 2021; 13:e13577. [PMID: 33815985 PMCID: PMC8009445 DOI: 10.7759/cureus.13577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective: Pulmonary vascular resistance (PVR) is a measurement obtained with invasive right heart catheterization (RHC) that is commonly used for management of patients with pulmonary arterial hypertension (PAH). Computed tomography pulmonary angiography (CTPA) is also done as part of the workup for PAH in some cases. The aim of our study was to assess the correlation of contrast dynamic changes in the main pulmonary artery (MPA) on CTPA with PVR obtained with RHC. Methods: This is an IRB-approved retrospective study performed in two separate institutions (Medical College of Wisconsin and University of Alabama) between January 2010 and December 2013. During CTPA done as test bolus, serial images are acquired at the level of MPA after intravenous injection of contrast to determine timing of the CT acquisition. Since the PVR changes with the degree of PAH, we hypothesize that will be reflected in the contrast kinetics in MPA. A correlation of standard CT metrics (MPA diameter, right pulmonary artery [PA] diameter, left PA diameter, MPA/aorta ratio, and right ventricle/left ventricle [RV/LV] ratio) and dynamic (full width at half maximum) CTPA parameters in patients with known PAH was performed with PVR obtained from RHC done within 30 days. Statistical analysis was performed by Pearson correlation coefficient. Results: Among 221 patients in our database, 37 patients fulfilled the selection criteria. There was a strong correlation between full width half maximum (FWHM) and mean pulmonary artery pressure (mPAP) (r=0.69, p value<0.00001), PVR (r=0.8, p value<0.00001) and indexed PVR (PVRI) (r=0.75, p value<0.00001). Conclusion: FWHM obtained from CTPA strongly correlates with RHC parameters and is potentially more helpful than static measurements for follow-up of patients with known PAH to assess response to treatment or progression.
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Affiliation(s)
- Dhiraj Baruah
- Radiodiagnosis, Medical University of South Carolina, Charleston, USA
| | | | | | - Hrudaya Nath
- Radiology, University of Alabama, Birmingham, USA
| | - Kenneth Presberg
- Pulmonary Medicine, Medical College of Wisconsin, Milwaukee, USA
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Gopalan D, Gibbs JSR. From Early Morphometrics to Machine Learning-What Future for Cardiovascular Imaging of the Pulmonary Circulation? Diagnostics (Basel) 2020; 10:diagnostics10121004. [PMID: 33255668 PMCID: PMC7760106 DOI: 10.3390/diagnostics10121004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/19/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023] Open
Abstract
Imaging plays a cardinal role in the diagnosis and management of diseases of the pulmonary circulation. Behind the picture itself, every digital image contains a wealth of quantitative data, which are hardly analysed in current routine clinical practice and this is now being transformed by radiomics. Mathematical analyses of these data using novel techniques, such as vascular morphometry (including vascular tortuosity and vascular volumes), blood flow imaging (including quantitative lung perfusion and computational flow dynamics), and artificial intelligence, are opening a window on the complex pathophysiology and structure-function relationships of pulmonary vascular diseases. They have the potential to make dramatic alterations to how clinicians investigate the pulmonary circulation, with the consequences of more rapid diagnosis and a reduction in the need for invasive procedures in the future. Applied to multimodality imaging, they can provide new information to improve disease characterization and increase diagnostic accuracy. These new technologies may be used as sophisticated biomarkers for risk prediction modelling of prognosis and for optimising the long-term management of pulmonary circulatory diseases. These innovative techniques will require evaluation in clinical trials and may in themselves serve as successful surrogate end points in trials in the years to come.
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Affiliation(s)
- Deepa Gopalan
- Imperial College Healthcare NHS Trust, London W12 0HS, UK
- Imperial College London, London SW7 2AZ, UK;
- Cambridge University Hospital, Cambridge CB2 0QQ, UK
- Correspondence: ; Tel.: +44-77-3000-7780
| | - J. Simon R. Gibbs
- Imperial College London, London SW7 2AZ, UK;
- National Heart & Lung Institute, Imperial College London, London SW3 6LY, UK
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6
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Abstract
Online supplemental material is available for this article.
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Affiliation(s)
- Furkan Ufuk
- From the Department of Radiology, Pamukkale University Medical School, University of Pamukkale, Kinikli, 20100 Denizli, Turkey
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7
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Weatherley ND, Eaden JA, Stewart NJ, Bartholmai BJ, Swift AJ, Bianchi SM, Wild JM. Experimental and quantitative imaging techniques in interstitial lung disease. Thorax 2019; 74:611-619. [PMID: 30886067 PMCID: PMC6585263 DOI: 10.1136/thoraxjnl-2018-211779] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 01/05/2019] [Accepted: 01/14/2019] [Indexed: 01/19/2023]
Abstract
Interstitial lung diseases (ILDs) are a heterogeneous group of conditions, with a wide and complex variety of imaging features. Difficulty in monitoring, treating and exploring novel therapies for these conditions is in part due to the lack of robust, readily available biomarkers. Radiological studies are vital in the assessment and follow-up of ILD, but currently CT analysis in clinical practice is qualitative and therefore somewhat subjective. In this article, we report on the role of novel and quantitative imaging techniques across a range of imaging modalities in ILD and consider how they may be applied in the assessment and understanding of ILD. We critically appraised evidence found from searches of Ovid online, PubMed and the TRIP database for novel and quantitative imaging studies in ILD. Recent studies have explored the capability of texture-based lung parenchymal analysis in accurately quantifying several ILD features. Newer techniques are helping to overcome the challenges inherent to such approaches, in particular distinguishing peripheral reticulation of lung parenchyma from pleura and accurately identifying the complex density patterns that accompany honeycombing. Robust and validated texture-based analysis may remove the subjectivity that is inherent to qualitative reporting and allow greater objective measurements of change over time. In addition to lung parenchymal feature quantification, pulmonary vessel volume analysis on CT has demonstrated prognostic value in two retrospective analyses and may be a sign of vascular changes in ILD which, to date, have been difficult to quantify in the absence of overt pulmonary hypertension. Novel applications of existing imaging techniques, such as hyperpolarised gas MRI and positron emission tomography (PET), show promise in combining structural and functional information. Although structural imaging of lung tissue is inherently challenging in terms of conventional proton MRI techniques, inroads are being made with ultrashort echo time, and dynamic contrast-enhanced MRI may be used for lung perfusion assessment. In addition, inhaled hyperpolarised 129Xenon gas MRI may provide multifunctional imaging metrics, including assessment of ventilation, intra-acinar gas diffusion and alveolar-capillary diffusion. PET has demonstrated high standard uptake values (SUVs) of 18F-fluorodeoxyglucose in fibrosed lung tissue, challenging the assumption that these are ‘burned out’ and metabolically inactive regions. Regions that appear structurally normal also appear to have higher SUV, warranting further exploration with future longitudinal studies to assess if this precedes future regions of macroscopic structural change. Given the subtleties involved in diagnosing, assessing and predicting future deterioration in many forms of ILD, multimodal quantitative lung structure-function imaging may provide the means of identifying novel, sensitive and clinically applicable imaging markers of disease. Such imaging metrics may provide mechanistic and phenotypic information that can help direct appropriate personalised therapy, can be used to predict outcomes and could potentially be more sensitive and specific than global pulmonary function testing. Quantitative assessment may objectively assess subtle change in character or extent of disease that can assist in efficacy of antifibrotic therapy or detecting early changes of potentially pneumotoxic drugs involved in early intervention studies.
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Affiliation(s)
| | - James A Eaden
- Academic Unit of Academic Radiology, University of Sheffield, Sheffield, UK
| | - Neil J Stewart
- Academic Unit of Academic Radiology, University of Sheffield, Sheffield, UK
| | - Brian J Bartholmai
- Department of Radiology, Mayo Clinic Minnesota, Rochester, Minnesota, USA
| | - Andrew J Swift
- Academic Unit of Academic Radiology, University of Sheffield, Sheffield, UK
| | - Stephen Mark Bianchi
- Department of Respiratory Medicine, Sheffield Teaching Hospitals Foundation Trust, Sheffield, UK
| | - Jim M Wild
- Academic Unit of Academic Radiology, University of Sheffield, Sheffield, UK
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8
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Romei C, Turturici L, Tavanti L, Miedema J, Fiorini S, Marletta M, Wielopolski P, Tiddens H, Falaschi F, Ciet P. The use of chest magnetic resonance imaging in interstitial lung disease: a systematic review. Eur Respir Rev 2018; 27:27/150/180062. [PMID: 30567932 DOI: 10.1183/16000617.0062-2018] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Accepted: 10/23/2018] [Indexed: 01/09/2023] Open
Abstract
Thin-slices multi-detector computed tomography (MDCT) plays a key role in the differential diagnosis of interstitial lung disease (ILD). However, thin-slices MDCT has a limited ability to detect active inflammation, which is an important target of newly developed ILD drug therapy. Magnetic resonance imaging (MRI), thanks to its multi-parameter capability, provides better tissue characterisation than thin-slices MDCT.Our aim was to summarise the current status of MRI applications in ILD and to propose an ILD-MRI protocol. A systematic literature search was conducted for relevant studies on chest MRI in patients with ILD.We retrieved 1246 papers of which 55 original papers were selected for the review. We identified 24 studies comparing image quality of thin-slices MDCT and MRI using several MRI sequences. These studies described new MRI sequences to assess ILD parenchymal abnormalities, such as honeycombing, reticulation and ground-glass opacity. Thin-slices MDCT remains superior to MRI for morphological imaging. However, recent studies with ultra-short echo-time MRI showed image quality comparable to thin-slices MDCT. Several studies demonstrated the added value of chest MRI by using functional imaging, especially to detect and quantify inflammatory changes.We concluded that chest MRI could play a role in ILD patients to differentiate inflammatory and fibrotic changes and to assess efficacy of new ILD drugs.
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Affiliation(s)
- Chiara Romei
- 2nd Radiology Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
| | - Laura Turturici
- Radiology, Azienda USL Toscana nord ovest Sede di Viareggio, Viareggio, Italy
| | - Laura Tavanti
- Dept of Surgical, Medical, Molecular Pathology and Critical Care, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
| | - Jelle Miedema
- Dept of Respiratory Medicine, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Sara Fiorini
- 1st Radiology Unit, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy
| | - Massimo Marletta
- 1st Radiology Unit, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy
| | - Piotr Wielopolski
- Dept of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Harm Tiddens
- Dept of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Dept of Pediatric Pulmonology and Allergology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Fabio Falaschi
- 2nd Radiology Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy
| | - Pierluigi Ciet
- Dept of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Dept of Pediatric Pulmonology and Allergology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
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Diagnostic and Prognostic Implications of Exercise Treadmill and Rest First-Pass Radionuclide Angiography in Patients With Pulmonary Hypertension. Clin Nucl Med 2017; 42:e392-e399. [PMID: 28590298 DOI: 10.1097/rlu.0000000000001720] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Pulmonary hypertension (PH) is characterized by abnormally increased pulmonary vascular pressure, leading to deteriorated right ventricular function and premature death. Pulmonary mean transit time (PMTT) and biventricular function response to exercise in first-pass radionuclide angiography (FP-RNA) may provide early detection and timely disease monitoring of PH. This study aimed to investigate the diagnostic and prognostic values of this imaging modality in PH patients. METHODS Left and right ventricular ejection fraction (LVEF/RVEF) and PMTT at rest and immediately after exercise treadmill test were measured by FP-RNA in 77 consecutive patients with clinical presentations suggestive of PH (aged 46 ± 15 years, 33 men), mostly with symptoms of unexplained progressive dyspnea. These parameters, along with other clinical variables, were correlated with right-sided heart catheterization data and clinical outcomes. RESULTS Fifty patients (64.9%) were diagnosed as having definite PH. Besides higher N-terminal pro-B-type natriuretic peptide levels, right atrial pressure, and pulmonary vascular resistance, PH patients had significantly longer PMTT, lower LVEF after exercise and rest, and lower poststress RVEF (all P < 0.05), compared with non-PH subjects. Moreover, PH patients exhibited stress-induced right ventricular dysfunction and stationary poststress PMTT. Poststress PMTT and echocardiography had comparable diagnostic utility (area under the curve, 0.80 vs 0.84, respectively). Eighteen patients died during a median follow-up period of 380 days. Failure of exercise treadmill test, lower peak heart rate response, and stress/rest LVEF ratio of less than 90% using exercise treadmill FP-RNA were independent predictors of mortality in PH patients. CONCLUSIONS Exercise treadmill and rest FP-RNA provided diagnostic value and had prognostic implications in patients with PH.
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10
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Cao JJ, Li L, McLaughlin J, Passick M. Prolonged central circulation transit time in patients with HFpEF and HFrEF by magnetic resonance imaging. Eur Heart J Cardiovasc Imaging 2017; 19:339-346. [DOI: 10.1093/ehjci/jex051] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/02/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jie J Cao
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
- Department of Cardiology, State University of New York at Stony Brook, 101 Nicolls Road, Stony Brook, NY 11794, USA
| | - Laura Li
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
| | - Jeannette McLaughlin
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
| | - Michael Passick
- Department of Cardiac Imaging, St Francis Hospital, The Heart Center, 100 Port Washington Blvd, Roslyn, NY 11576, USA
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Johns CS, Swift AJ, Hughes PJ, Ohno Y, Schiebler M, Wild JM. Pulmonary MR angiography and perfusion imaging—A review of methods and applications. Eur J Radiol 2017; 86:361-370. [DOI: 10.1016/j.ejrad.2016.10.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/01/2016] [Indexed: 10/20/2022]
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12
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Stewart NJ, Wild JM. MRI methods for structural and functional assessment of the lungs: proton and multinuclear. IMAGING 2016. [DOI: 10.1183/2312508x.10002115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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13
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Multiparametric Magnetic Resonance Imaging in Pulmonary Hypertension. CURRENT CARDIOVASCULAR IMAGING REPORTS 2015. [DOI: 10.1007/s12410-015-9360-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wellman TJ, Winkler T, Vidal Melo MF. Modeling of Tracer Transport Delays for Improved Quantification of Regional Pulmonary ¹⁸F-FDG Kinetics, Vascular Transit Times, and Perfusion. Ann Biomed Eng 2015; 43:2722-34. [PMID: 25940652 DOI: 10.1007/s10439-015-1327-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 04/20/2015] [Indexed: 10/23/2022]
Abstract
¹⁸F-FDG-PET is increasingly used to assess pulmonary inflammatory cell activity. However, current models of pulmonary ¹⁸F-FDG kinetics do not account for delays in ¹⁸F-FDG transport between the plasma sampling site and the lungs. We developed a three-compartment model of ¹⁸F-FDG kinetics that includes a delay between the right heart and the local capillary blood pool, and used this model to estimate regional pulmonary perfusion. We acquired dynamic ¹⁸F-FDG scans in 12 mechanically ventilated sheep divided into control and lung injury groups (n = 6 each). The model was fit to tracer kinetics in three isogravitational regions-of-interest to estimate regional lung transport delays and regional perfusion. ¹³NN bolus infusion scans were acquired during a period of apnea to measure regional perfusion using an established reference method. The delayed input function model improved description of ¹⁸F-FDG kinetics (lower Akaike Information Criterion) in 98% of studied regions. Local transport delays ranged from 2.0 to 13.6 s, averaging 6.4 ± 2.9 s, and were highest in non-dependent regions. Estimates of regional perfusion derived from model parameters were highly correlated with perfusion measurements based on ¹³NN-PET (R² = 0.92, p < 0.001). By incorporating local vascular transports delays, this model of pulmonary ¹⁸F-FDG kinetics allows for simultaneous assessment of regional lung perfusion, transit times, and inflammation.
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Affiliation(s)
- Tyler J Wellman
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St, Boston, MA, 02114, USA
| | - Tilo Winkler
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St, Boston, MA, 02114, USA
| | - Marcos F Vidal Melo
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, 55 Fruit St, Boston, MA, 02114, USA.
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Dias OM, Baldi BG, Costa AN, Carvalho CRR. Combined pulmonary fibrosis and emphysema: an increasingly recognized condition. J Bras Pneumol 2015; 40:304-12. [PMID: 25029654 PMCID: PMC4109203 DOI: 10.1590/s1806-37132014000300014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 05/19/2014] [Indexed: 12/25/2022] Open
Abstract
Combined pulmonary fibrosis and emphysema (CPFE) has been increasingly recognized in the literature. Patients with CPFE are usually heavy smokers or former smokers with concomitant lower lobe fibrosis and upper lobe emphysema on chest HRCT scans. They commonly present with severe breathlessness and low DLCO, despite spirometry showing relatively preserved lung volumes. Moderate to severe pulmonary arterial hypertension is common in such patients, who are also at an increased risk of developing lung cancer. Unfortunately, there is currently no effective treatment for CPFE. In this review, we discuss the current knowledge of the pathogenesis, clinical characteristics, and prognostic factors of CPFE. Given that most of the published data on CPFE are based on retrospective analysis, more studies are needed in order to address the role of emphysema and its subtypes; the progression of fibrosis/emphysema and its correlation with inflammation; treatment options; and prognosis.
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Affiliation(s)
- Olívia Meira Dias
- Instituto do Coração, Hospital das Clínicas, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Bruno Guedes Baldi
- Instituto do Coração, Hospital das Clínicas, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - André Nathan Costa
- Instituto do Coração, Hospital das Clínicas, School of Medicine, University of São Paulo, São Paulo, Brazil
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Quantitative magnetic resonance imaging of pulmonary hypertension: a practical approach to the current state of the art. J Thorac Imaging 2014; 29:68-79. [PMID: 24552882 DOI: 10.1097/rti.0000000000000079] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Pulmonary hypertension is a condition of varied etiology, commonly associated with poor clinical outcome. Patients are categorized on the basis of pathophysiological, clinical, radiologic, and therapeutic similarities. Pulmonary arterial hypertension (PAH) is often diagnosed late in its disease course, with outcome dependent on etiology, disease severity, and response to treatment. Recent advances in quantitative magnetic resonance imaging (MRI) allow for better initial characterization and measurement of the morphologic and flow-related changes that accompany the response of the heart-lung axis to prolonged elevation of pulmonary arterial pressure and resistance and provide a reproducible, comprehensive, and noninvasive means of assessing the course of the disease and response to treatment. Typical features of PAH occur primarily as a result of increased pulmonary vascular resistance and the resultant increased right ventricular (RV) afterload. Several MRI-derived diagnostic markers have emerged, such as ventricular mass index, interventricular septal configuration, and average pulmonary artery velocity, with diagnostic accuracy similar to that of Doppler echocardiography. Furthermore, prognostic markers have been identified with independent predictive value for identification of treatment failure. Such markers include large RV end-diastolic volume index, low left ventricular end-diastolic volume index, low RV ejection fraction, and relative area change of the pulmonary trunk. MRI is ideally suited for longitudinal follow-up of patients with PAH because of its noninvasive nature and high reproducibility and is advantageous over other biomarkers in the study of PAH because of its sensitivity to change in morphologic, functional, and flow-related parameters. Further study on the role of MRI image based biomarkers in the clinical environment is warranted.
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Pulmonary hypertension detection using dynamic and static measurable parameters on CT angiography. J Comput Assist Tomogr 2014; 38:586-90. [PMID: 24733003 DOI: 10.1097/rct.0000000000000091] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The aim was to assess dynamic and static parameters on routine computed tomography pulmonary angiography (CTPA) that may detect pulmonary hypertension (PH). METHODS Fifty patients underwent CTPA and echocardiograms. Twenty-six patients had PH, and 24 patients did not have PH. The following parameters were measured on CTPA: density of the pulmonary artery (PA), ratio between the density in the PA and the thoracic aorta (TA), the time between the start of contrast injection to the time the scan trigger density was reached, and PA diameter. RESULTS All measured parameters showed significant correlation with PH detected by echocardiogram. The best combination of parameters for detection of PH was contrast density ratio between PA and thoracic aorta of greater than or equal to 1.5 and/or a time to scan trigger of greater than or equal to 8 seconds. CONCLUSIONS The parameters measured correlate well with PH by echocardiography. This suggests that CTPA can potentially be used to detect PH.
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Stewart NJ, Leung G, Norquay G, Marshall H, Parra-Robles J, Murphy PS, Schulte RF, Elliot C, Condliffe R, Griffiths PD, Kiely DG, Whyte MK, Wolber J, Wild JM. Experimental validation of the hyperpolarized129Xe chemical shift saturation recovery technique in healthy volunteers and subjects with interstitial lung disease. Magn Reson Med 2014; 74:196-207. [DOI: 10.1002/mrm.25400] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 07/15/2014] [Accepted: 07/15/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Neil J. Stewart
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - General Leung
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Graham Norquay
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Helen Marshall
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Juan Parra-Robles
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | | | | | - Charlie Elliot
- Academic Directorate of Respiratory Medicine; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
- Sheffield Pulmonary Vascular Disease Unit; Sheffield Teaching Hospitals, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Robin Condliffe
- Academic Directorate of Respiratory Medicine; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
- Sheffield Pulmonary Vascular Disease Unit; Sheffield Teaching Hospitals, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Paul D. Griffiths
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - David G. Kiely
- Academic Directorate of Respiratory Medicine; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
- Sheffield Pulmonary Vascular Disease Unit; Sheffield Teaching Hospitals, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Moira K. Whyte
- Academic Directorate of Respiratory Medicine; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
| | - Jan Wolber
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
- Medical Diagnostics; GE Healthcare; Amersham United Kingdom
| | - Jim M. Wild
- Academic Unit of Radiology; University of Sheffield, Royal Hallamshire Hospital; Sheffield United Kingdom
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Swift AJ, Telfer A, Rajaram S, Condliffe R, Marshall H, Capener D, Hurdman J, Elliot C, Kiely DG, Wild JM. Dynamic contrast-enhanced magnetic resonance imaging in patients with pulmonary arterial hypertension. Pulm Circ 2014; 4:61-70. [PMID: 25006422 DOI: 10.1086/674882] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 10/25/2013] [Indexed: 11/03/2022] Open
Abstract
Dynamic contrast-enhanced (DCE) time-resolved magnetic resonance (MR) imaging is a technique whereby the passage of an intravenous contrast bolus can be tracked through the pulmonary vascular system. The aim of this study was to investigate the prognostic significance of DCE-MR pulmonary blood transit times in patients with pulmonary arterial hypertension (PAH). Seventy-nine patients diagnosed with PAH underwent pulmonary DCE imaging at 1.5 T using a time-resolved three-dimensional spoiled gradient echo sequence. The prognostic significance of two DCE parameters, full width at half maximum (FWHM) of the first-pass clearance curve and pulmonary transit time (PTT), along with demographic and invasive catheter measurements, was evaluated by univariate and bivariate Cox proportional hazards regression and Kaplan-Meier analysis. DCE-MR transit times were most closely correlated with cardiac index (CI) and pulmonary vascular resistance index (PVRI) and were both found to be accurate for detecting reduced CI (FWHM area under the curve [AUC] at receiver operating characteristic analysis = 0.91 and PTT AUC = 0.92, respectively) and for detecting elevated PVRI (FWHM AUC = 0.88 and PTT AUC = 0.84, respectively). During the follow-up period, 25 patients died. Patients with longer measurements of FWHM (P = 0.0014) and PTT (P = 0.004) were associated with poor outcome at Kaplan-Meier analysis, and both parameters were strong predictors of adverse outcome from Cox proportional hazards analysis (P = 0.013 and 0.010, respectively). At bivariate analysis, DCE measurements predicted mortality independent of age, gender, and World Health Organization functional class; however, invasive hemodynamic indexes CI, PVRI, and DCE measurements were not independent of one another. In conclusion, DCE-MR transit times predict mortality in patients with PAH and are closely associated with clinical gold standards CI and PVRI.
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Affiliation(s)
- Andrew J Swift
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom ; National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom
| | - Adam Telfer
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom
| | - Smitha Rajaram
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom
| | - Robin Condliffe
- National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom ; Sheffield Pulmonary Vascular Clinic, Sheffield Teaching Hospitals Trust, Sheffield, United Kingdom
| | - Helen Marshall
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom ; National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom
| | - Dave Capener
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom
| | - Judith Hurdman
- Sheffield Pulmonary Vascular Clinic, Sheffield Teaching Hospitals Trust, Sheffield, United Kingdom
| | - Charlie Elliot
- National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom ; Sheffield Pulmonary Vascular Clinic, Sheffield Teaching Hospitals Trust, Sheffield, United Kingdom
| | - David G Kiely
- National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom ; Sheffield Pulmonary Vascular Clinic, Sheffield Teaching Hospitals Trust, Sheffield, United Kingdom
| | - Jim M Wild
- Academic Unit of Radiology, University of Sheffield, Sheffield, United Kingdom ; National Institute of Health Research, Cardiovascular Biomedical Research Unit, Sheffield, United Kingdom
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Sergiacomi G, Taglieri A, Chiaravalloti A, Calabria E, Arduini S, Tosti D, Citraro D, Pezzuto G, Puxeddu E, Simonetti G. Acute COPD exacerbation: 3 T MRI evaluation of pulmonary regional perfusion – Preliminary experience. Respir Med 2014; 108:875-82. [DOI: 10.1016/j.rmed.2014.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 03/31/2014] [Accepted: 04/03/2014] [Indexed: 11/24/2022]
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22
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Swift AJ, Rajaram S, Hurdman J, Hill C, Davies C, Sproson TW, Morton AC, Capener D, Elliot C, Condliffe R, Wild JM, Kiely DG. Noninvasive Estimation of PA Pressure, Flow, and Resistance With CMR Imaging. JACC Cardiovasc Imaging 2013; 6:1036-1047. [DOI: 10.1016/j.jcmg.2013.01.013] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 01/17/2013] [Accepted: 01/24/2013] [Indexed: 10/26/2022]
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Iwasawa T. Diagnosis and management of pulmonary arterial hypertension using MR imaging. Magn Reson Med Sci 2013; 12:1-9. [PMID: 23474963 DOI: 10.2463/mrms.2012-0040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a syndrome that results from restricted blood flow through the pulmonary arterial circulation, which leads to a pathological increase in pulmonary vascular resistance (PVR) and ultimately to right heart failure. The prognosis of patients with PAH has improved with the recent development of new medications. The need for new noninvasive diagnostic tools is increasing. Magnetic resonance (MR) imaging is the gold standard for assessing the right ventricle (RV). Its high degree of reproducibility makes it ideal for monitoring changes in RV parameters in response to therapy. MR imaging can also provide both anatomical and functional information about pulmonary hemodynamics. This article reviews the current status of MR imaging of the right side of the heart and pulmonary circulation in patients with PAH and other associated pulmonary diseases.
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Affiliation(s)
- Tae Iwasawa
- Department of Radiology, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan.
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24
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Current Role of Imaging in the Diagnosis and Management of Pulmonary Hypertension. AJR Am J Roentgenol 2012; 198:1320-31. [DOI: 10.2214/ajr.11.7366] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Skrok J, Shehata ML, Mathai S, Girgis RE, Zaiman A, Mudd JO, Boyce D, Lechtzin N, Lima JAC, Bluemke DA, Hassoun PM, Vogel-Claussen J. Pulmonary arterial hypertension: MR imaging-derived first-pass bolus kinetic parameters are biomarkers for pulmonary hemodynamics, cardiac function, and ventricular remodeling. Radiology 2012; 263:678-87. [PMID: 22509050 DOI: 10.1148/radiol.12111001] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE To prospectively compare contrast material-enhanced (CE) magnetic resonance (MR) imaging-derived right-to-left ventricle pulmonary transit time (PTT), left ventricular (LV) full width at half maximum (FWHM), and LV time to peak (TTP) between patients with pulmonary arterial hypertension (PAH) and healthy volunteers and to correlate these measurements with survival markers in patients with PAH. MATERIALS AND METHODS This HIPAA-compliant study received institutional review board approval. Written informed consent was obtained from all participants. Forty-three patients (32 with PAH [29 women; median age, 55.4 years], 11 with scleroderma but not PAH [seven women; median age, 58.9 years]) underwent right-sided heart catheterization and 3-T CE cardiac MR imaging. Eighteen age- and sex-matched healthy control subjects (12 women; median age, 51.7 years) underwent only CE MR imaging. A short-axis saturation-recovery gradient-echo section was acquired in the basal third of both ventricles, and right-to-left-ventricle PTT, LV FWHM, and LV TTP were calculated. Statistical analysis included Kruskal-Wallis test, Wilcoxon rank sum test, Spearman correlation coefficient, multiple linear regression analysis, and Lin correlation coefficient analysis. RESULTS Patients had significantly longer PTT (median, 8.2 seconds; 25th-75th percentile, 6.9-9.9 seconds), FWHM (median, 8.2 seconds; 25th-75th percentile, 5.7-11.4 seconds), and TTP (median, 4.8 seconds; 25th-75th percentile, 3.9-6.5 seconds) than did control subjects (median, 6.4 seconds; 25th-75th percentile, 5.7-7.1 seconds; median, 5.2 seconds; 25th-75th percentile, 4.1-6.1 seconds; median, 3.2 seconds; 25th-75th percentile, 2.8-3.8 seconds, respectively; P < .01 for each) and subjects with scleroderma but not PAH (median, 6.5 seconds; 25th-75th percentile, 5.6-7.0 seconds; median, 5.0 seconds; 25th-75th percentile, 4.0-7.3 seconds; median, 3.6 seconds; 25th-75th percentile, 2.7-4.0 seconds, respectively; P < .02 for each). PTT, LV FWHM, and LV TTP correlated with pulmonary vascular resistance index (P < .01), right ventricular stroke volume index (P ≤ .01), and pulmonary artery capacitance (P ≤ .02). In multiple linear regression models, PTT, FWHM, and TTP were associated with mean pulmonary arterial pressure and cardiac index. CONCLUSION CE MR-derived PTT, LV FWHM, and LV TTP are noninvasive compound markers of pulmonary hemodynamics and cardiac function in patients with PAH. Their predictive value for patient outcome warrants further investigation.
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Affiliation(s)
- Jan Skrok
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Nelson Basement MRI 110, 600 N Wolfe St, Baltimore, MD 21287, USA
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Abstract
Pulmonary magnetic resonance (MR) imaging has been put forward as a new research and diagnostic tool mainly to overcome the limitations of computed tomography and nuclear medicine studies. However, pulmonary MR imaging has been difficult to use because of inherently low proton density, a multitude of air-tissue interfaces, which create significant magnetic field distortions and are commonly referred to as susceptibility artifacts; diminishing signal in the lung; and respiratory and/or cardiac motion artifacts. To overcome these drawbacks of pulmonary MR imaging, technical advances made during the last decade in sequencing, scanner and coil, adaptation of parallel imaging techniques, and utilization of contrast media have been reported as being useful for functional and morphologic assessment of various pulmonary diseases including airway diseases. This review article covers (1) pulmonary MR techniques for morphologic and functional assessment of airway diseases, and (2) pulmonary MR imaging for cystic fibrosis, asthma, and chronic obstructive pulmonary disease. Pulmonary MR imaging provides not only morphology-related but also pulmonary function-related information. It has the potential to replace nuclear medicine studies for the identification of regional pulmonary function and may perform a complementary role in airway disease assessment instead of nuclear medicine study. We believe that the findings of further basic studies as well as clinical applications of this new technique will validate the real significance of pulmonary MR imaging for the future of airway disease assessment and its usefulness for diagnostic radiology and pulmonary medicine.
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Combined Pulmonary Fibrosis and Emphysema Syndrome: A New Phenotype within the Spectrum of Smoking-Related Interstitial Lung Disease. Pulm Med 2012; 2012:867870. [PMID: 22448331 PMCID: PMC3289935 DOI: 10.1155/2012/867870] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 10/19/2011] [Indexed: 01/22/2023] Open
Abstract
Combined pulmonary fibrosis and emphysema (CPFE) is a recently defined syndrome, in which centrilobular and/or paraseptal emphysemas in upper lung zones coexist with pulmonary fibrosis in lower lobes in individuals. These patients have a characteristic lung function profile, with unexpected subnormal dynamic and static lung volumes, contrasting with a significant reduction of carbon monoxide transfer (DLco) and exercise hypoxemia. Pulmonary hypertension is highly prevalent in CPFE and is the leading determinant of death. Tobacco smoking has been proposed as the main factor in its etiology, though the pathophysiology and its natural history remain to be determined. High-resolution computed axial tomography is the mandatory tool to confirm the diagnosis. Currently, there is no consensus about its treatment since those published to date on this issue are limited to well-characterised series of cases; hence, a better understanding of this entity may help in the development of future therapeutic approaches.
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MDCT Bolus Tracking Data as an Adjunct for Predicting the Diagnosis of Pulmonary Hypertension and Concomitant Right-Heart Failure. AJR Am J Roentgenol 2011; 197:1064-72. [DOI: 10.2214/ajr.10.5420] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Rajaram S, Swift AJ, Capener D, Telfer A, Davies C, Hill C, Condliffe R, Elliot C, Hurdman J, Kiely DG, Wild JM. Diagnostic accuracy of contrast-enhanced MR angiography and unenhanced proton MR imaging compared with CT pulmonary angiography in chronic thromboembolic pulmonary hypertension. Eur Radiol 2011; 22:310-7. [PMID: 21887483 DOI: 10.1007/s00330-011-2252-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 06/13/2011] [Accepted: 07/04/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVE To evaluate the diagnostic accuracy of contrast-enhanced MR angiography (CE-MRA) and the added benefit of unenhanced proton MR angiography compared with CT pulmonary angiography (CTPA) in patients with chronic thromboembolic disease (CTE). METHODS A 2 year retrospective study of 53 patients with chronic thromboembolic pulmonary hypertension who underwent CTPA and MRI for suspected pulmonary hypertension and a control group of 36 patients with no CT evidence of pulmonary embolism. The MRI was evaluated for CTE and the combined diagnostic accuracy of ce-MRA and unenhanced proton MRA was determined. CE-MRA generated lung perfusion maps were also assessed. RESULTS The overall sensitivity and specificity of CE-MRA in diagnosing proximal and distal CTE were 98% and 94%, respectively. The sensitivity improved from 50% to 88% for central vessel disease when CE-MRA images were analysed with unenhanced proton MRA. The CE-MRA identified more stenoses (29/18), post-stenosis dilatation (23/7) and occlusions (37/29) compared with CTPA. The CE-MRA perfusion images showed a sensitivity of 92% for diagnosing CTE. CONCLUSION CE-MRA has high sensitivity and specificity for diagnosing CTE. The sensitivity of CE-MRA for visualisation of adherent central and lobar thrombus significantly improves with the addition of unenhanced proton MRA which delineates the vessel wall.
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Affiliation(s)
- Smitha Rajaram
- Unit of Academic Radiology, University of Sheffield, Sheffield, UK.
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Garcia-Alvarez A, Fernandez-Friera L, Mirelis JG, Sawit S, Nair A, Kallman J, Fuster V, Sanz J. Non-invasive estimation of pulmonary vascular resistance with cardiac magnetic resonance. Eur Heart J 2011; 32:2438-45. [DOI: 10.1093/eurheartj/ehr173] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Portillo Carroz K, Roldán Sánchez J, Morera Prat J. [Combined pulmonary fibrosis and emphysema]. Arch Bronconeumol 2010; 46:646-51. [PMID: 20673696 DOI: 10.1016/j.arbres.2010.06.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 06/17/2010] [Accepted: 06/19/2010] [Indexed: 01/15/2023]
Abstract
The combination of pulmonary fibrosis and emphysema (CPFE) is a recently defined syndrome, in which an upper lobe emphysema and lower lobe fibrosis coexist in a single patient. These patients have a characteristic lung function profile, with dynamic and static lung volumes apparently normal or minimally altered, contrasting with a significant reduction of carbon monoxide transfer (DLco) and exercise hypoxemia. Pulmonary hypertension is highly prevalent and is the principal negative prognostic factor for this condition. High resolution computed axial tomography (HRCT) is the main tool to confirm the diagnosis. Cigarette smoking has been proposed as the main factor in its etiology; however, neither pathogenic mechanisms nor the sequence of events involved in this syndrome has been clarified yet. Experimental studies in animal models are providing information on the involvement of some inflammatory mediators in the pathogenesis. There is currently no consensus on the therapeutic approach to be followed in these patients, since those published to date on this subject are limited to well-characterised series of cases. Therefore, it is a pathology with many unknowns yet to be resolved and highly likely to be underdiagnosed, unless its functional clinical characteristics are taken into account.
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