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Tedeschi SK, Becce F, Pascart T, Guermazi A, Budzik JF, Dalbeth N, Filippou G, Iagnocco A, Kohler MJ, Laredo JD, Smith SE, Simeone FJ, Yinh J, Choi H, Abhishek A. Imaging Features of Calcium Pyrophosphate Deposition Disease: Consensus Definitions From an International Multidisciplinary Working Group. Arthritis Care Res (Hoboken) 2023; 75:825-834. [PMID: 35439343 PMCID: PMC9579212 DOI: 10.1002/acr.24898] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/25/2022] [Accepted: 04/12/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To develop definitions for imaging features being considered as potential classification criteria for calcium pyrophosphate deposition (CPPD) disease, additional to clinical and laboratory criteria, and to compile example images of CPPD on different imaging modalities. METHODS The American College of Rheumatology and European Alliance of Associations for Rheumatology CPPD classification criteria Imaging Advisory Group (IAG) and Steering Committee drafted definitions of imaging features that are characteristic of CPPD on conventional radiography (CR), conventional computed tomography (CT), dual-energy CT (DECT), and magnetic resonance imaging (MRI). An anonymous expert survey was undertaken by a 35-member Combined Expert Committee, including all IAG members. The IAG and 5 external musculoskeletal radiologists with expertise in CPPD convened virtually to further refine item definitions and voted on example images illustrating CR, CT, and DECT item definitions, with ≥90% agreement required to deem them acceptable. RESULTS The Combined Expert Committee survey indicated consensus on all CR definitions. The IAG and external radiologists reached consensus on CT and DECT item definitions, which specify that calcium pyrophosphate deposits appear less dense than cortical bone. The group developed an MRI definition and acknowledged limitations of this modality for CPPD. Ten example images for CPPD were voted acceptable (4 CR, 4 CT, and 2 DECT), and 3 images of basic calcium phosphate deposition were voted acceptable to serve as contrast against imaging features of CPPD. CONCLUSION An international group of rheumatologists and musculoskeletal radiologists defined imaging features characteristic of CPPD on CR, CT, and DECT and assembled a set of example images as a reference for future clinical research studies.
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Affiliation(s)
- Sara K. Tedeschi
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women’s Hospital and Harvard Medical School, Boston, United States
| | - Fabio Becce
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Tristan Pascart
- Department of Rheumatology, Lille Catholic University, Lille, France
| | - Ali Guermazi
- Department of Radiology, Boston VA Healthcare System, Boston University School of Medicine, Boston, USA
| | - Jean-François Budzik
- Department of Diagnostic and Interventional Radiology, Lille Catholic Hospitals, Lille, France
| | - Nicola Dalbeth
- Department of Medicine, University of Auckland, Auckland, New Zealand
| | - Georgios Filippou
- Division of Rheumatology, Luigi Sacco University Hospital, Milan, Italy
| | - Annamaria Iagnocco
- Academic Rheumatology Centre, Dipartimento Scienze Cliniche e Biologiche, Università degli Studi di Torino, Turin, Italy
| | - Minna J. Kohler
- Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Jean-Denis Laredo
- Department of Orthopedic Surgery, Hôpital Lariboisière, Assistance Publique des Hôpitaux de Paris, UMR CNRS 7052, Université de Paris, Paris, France
| | - Stacy E. Smith
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Brigham and Women’s Hospital and Harvard Medical School, Boston, United States
| | - F. Joseph Simeone
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Janeth Yinh
- Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Hyon Choi
- Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston, United States
| | - Abhishek Abhishek
- Department of Academic Rheumatology, University of Nottingham, Nottingham, United Kingdom
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Sirotti S, Becce F, Sconfienza LM, Terslev L, Naredo E, Zufferey P, Pineda C, Gutierrez M, Adinolfi A, Serban T, MacCarter D, Mouterde G, Zanetti A, Scanu A, Möller I, Novo-Rivas U, Largo R, Sarzi-Puttini P, Abhishek A, Choi HK, Dalbeth N, Pascart T, Tedeschi SK, D'Agostino MA, Iagnocco A, Keen HI, Scirè CA, Filippou G. Reliability and Diagnostic Accuracy of Radiography for the Diagnosis of Calcium Pyrophosphate Deposition: Performance of the Novel Definitions Developed by an International Multidisciplinary Working Group. Arthritis Rheumatol 2022; 75:630-638. [PMID: 36122187 DOI: 10.1002/art.42368] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/07/2022] [Accepted: 09/13/2022] [Indexed: 01/20/2023]
Abstract
OBJECTIVE To assess the reliability and diagnostic accuracy of new radiographic imaging definitions developed by an international multidisciplinary working group for identification of calcium pyrophosphate deposition (CPPD). METHODS Patients with knee osteoarthritis scheduled for knee replacement were enrolled. Two radiologists and 2 rheumatologists twice assessed radiographic images for presence or absence of CPPD in menisci, hyaline cartilage, tendons, joint capsule, or synovial membrane, using the new definitions. In case of disagreement, a consensus decision was made and considered for the assessment of diagnostic performance. Histologic examination of postsurgical specimens under compensated polarized light microscopy was the reference standard. Prevalence-adjusted bias-adjusted kappa values were used to assess reliability, and diagnostic performance statistics were calculated. RESULTS Sixty-seven patients were enrolled for the reliability study. The interobserver reliability was substantial in most of the assessed structures when considering all 4 readers (κ range 0.59-0.90), substantial to almost perfect among radiologists (κ range 0.70-0.91), and moderate to almost perfect among rheumatologists (κ range 0.46-0.88). The intraobserver reliability was substantial to almost perfect for all the observers (κ range 0.70-1). Fifty-one patients were included in the accuracy study. Radiography demonstrated an overall specificity of 92% for CPPD, but sensitivity remained low for all sites and for the overall diagnosis (54%). CONCLUSION The new radiographic definitions of CPPD are highly specific against the gold standard of histologic diagnosis. When the described radiographic findings are present, these definitions allow for a definitive diagnosis of CPPD, rather than other calcium-containing crystal depositions; however, a negative radiographic finding does not exclude the diagnosis.
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Affiliation(s)
- Silvia Sirotti
- Rheumatology Department, Luigi Sacco University Hospital and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Fabio Becce
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Luca M Sconfienza
- Department of Biomedical Sciences for Health, Università Degli Studi di Milano, and IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Lene Terslev
- Center for Rheumatology and Spine Diseases, Rigshospitalet, Copenhagen University, Copenhagen, Denmark
| | - Esperanza Naredo
- Rheumatology Department, Joint and Bone Research Unit, Hospital Universitario Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
| | - Pascal Zufferey
- Rheumatology Department, University of Lausanne, CHUV, Lausanne, Switzerland
| | - Carlos Pineda
- Division of Rheumatology, Instituto Nacional de Rehabilitacion, Mexico City, Mexico
| | - Marwin Gutierrez
- Division of Rheumatology, Instituto Nacional de Rehabilitacion, Mexico City, Mexico
| | - Antonella Adinolfi
- Rheumatology Unit, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Teodora Serban
- Rheumatology Department, Ospedale La Colletta, ASL3 Genovese, Genoa, Italy
| | - Daryl MacCarter
- Rheumatology Department, North Valley Hospital, Whitefish, Montana
| | - Gael Mouterde
- Rheumatology Department, CHU Montpellier, Montpellier University, Montpellier, France
| | - Anna Zanetti
- Società Italiana di Reumatologia, Epidemiology Research Unit, Milan, Italy
| | - Anna Scanu
- Department of Neurosciences, Physical Medicine and Rehabilitation School, University of Padova, Padova, Italy
| | - Ingrid Möller
- Instituto Poal de Reumatologia, University of Barcelona, Barcelona, Spain
| | - Ulrike Novo-Rivas
- Department of Radiology, Hospital Universitario Fundación Jiménez Diáz, Universidad Autónoma, Madrid, Spain
| | - Raquel Largo
- Joint and Bone Research Unit, Rheumatology Department, IIS-Fundación Jiménez Diáz, Universidad Autónoma, Madrid, Spain
| | - Piercarlo Sarzi-Puttini
- Rheumatology Department, Luigi Sacco University Hospital and Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | | | - Hyon K Choi
- Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital and Harvard Medical School, Boston
| | - Nicola Dalbeth
- Bone and Joint Research Group, Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Tristan Pascart
- Rheumatology Department, Groupe Hospitalier de l'Institut Catholique de Lille, Lille Catholic University, Lille, France
| | - Sara K Tedeschi
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston
| | - Maria-Antonietta D'Agostino
- Rheumatology Department, Università Cattolica del Sacro Cuore, Policlinico Universitario Agostino Gemelli IRCSS, Rome, Italy
| | - Annamaria Iagnocco
- Academic Rheumatology Centre, Department of Clinical and Biological Sciences, Università degli Studi di Torino, Turin, Italy
| | - Helen I Keen
- School of Medicine, The University of Western Australia, Murdoch, Perth, Australia
| | - Carlo A Scirè
- Società Italiana di Reumatologia, Epidemiology Research Unit, and School of Medicine, University of Milano-Bicocca, Milan, Italy
| | - Georgios Filippou
- IRCCS Istituto Ortopedico Galeazzi, Rheumatology Department, Milan, Italy
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Døssing A, Müller FC, Becce F, Stamp L, Bliddal H, Boesen M. Dual-Energy Computed Tomography for Detection and Characterization of Monosodium Urate, Calcium Pyrophosphate, and Hydroxyapatite: A Phantom Study on Diagnostic Performance. Invest Radiol 2021; 56:417-424. [PMID: 33559986 DOI: 10.1097/rli.0000000000000756] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The aim of this study was to determine the diagnostic performance of dual-energy computed tomography (DECT) to detect and distinguish crystal deposits in a phantom. The primary objective was to determine the cutoff DECT ratio and the cross-sectional area (CSA) of a crystal deposit necessary to differentiate monosodium urate (MSU), calcium pyrophosphate (CPP), and calcium hydroxyapatite (HA) using DECT. Our secondary objective was to determine the concentration for limit of detection for MSU, CPP, and HA crystal deposits. Exploratory objectives included the comparison between 2 generations of DECT scanners from the same manufacturer as well as different scanner settings. MATERIALS AND METHODS We used a cylindrical soft tissue phantom with synthetic MSU, CPP, and HA crystals suspended in resin. Crystal suspension concentration increased with similar attenuation between MSU, CPP, and HA in conventional CT. The phantom was scanned on 2 dual-source DECT scanners, at 2 dose levels and all available tube voltage combinations. Both scanners had a tin (Sn) filter at the high-energy spectra. Dual-energy CT ratios were calculated for a given tube voltage combination by dividing linear regression lines of CT numbers against concentration. Dual-energy CT ratios were compared using an analysis of covariance. Receiver operating characteristic curves and corresponding areas under the curve (AUCs) were calculated for individual crystal suspension comparisons (HA vs CPP, MSU vs CPP, and MSU vs HA). RESULTS At standard clinical scan settings with 8 mGy and 80/Sn150 kV, the DECT ratios were as follows: CPP, 2.02 (95% confidence interval [CI], 1.98-2.07); HA, 2.00 (95% CI, 1.96-2.05); and MSU, 1.09 (95% CI, 1.06-1.11). Ratios varied numerically depending on the scanner and tube voltage combination. Monosodium urate crystal DECT ratios were significantly different from HA and CPP (P < 0.001), whereas DECT ratios for HA and CPP crystals did not differ significantly (P = 0.99). The differentiation of MSU crystals from both calcium crystals (HA and CPP) was excellent with an AUC of 1.00 (95% CI, 1.00-1.00) and an optimal cutoff DECT ratio of 1.43:1.40 depending on the scanner. In addition, differentiation of MSU and calcium-containing crystals (HA and CPP) required a CSA of minimum 4 pixels of crystal at standard clinical scan conditions. In contrast, differentiation between CPP and HA crystals was moderate with AUCs ranging from 0.66 (95% CI, 0.52-0.80) to 0.80 (95% CI, 0.69-0.91) and an optimal cutoff DECT ratio of 2.02:2.06 depending on the scanner. Furthermore, differentiation between CPP and HA crystals required a CSA of minimum 87 pixels of crystal at standard clinical scan conditions, corresponding to a region of interest of 3.7 mm diameter. When scanning at highest possible spectral separation and maximum dose of 50 mGy, the limit of detection for crystals within a region of interest of 50 pixels was 14 mg/cm3 for MSU and 2 mg/cm3 for both CPP and HA. CONCLUSIONS This phantom study shows that DECT can be used to detect MSU, CPP, and HA crystal deposits. Differentiation of CPP and HA was not possible in crystals deposits less than 3.7 mm in diameter, but MSU could accurately be differentiated from CPP and HA crystal deposits at standard clinical scan conditions.
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Affiliation(s)
- Anna Døssing
- From the The Parker Institute, Bispebjerg and Frederiksberg Hospital
| | - Felix Christoph Müller
- Department of Radiology, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Fabio Becce
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Lisa Stamp
- Department of Medicine, University of Otago, Christchurch, New Zealand
| | - Henning Bliddal
- From the The Parker Institute, Bispebjerg and Frederiksberg Hospital
| | - Mikael Boesen
- Department of Radiology, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
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Marfo E, Anderson NG, Butler APH, Schleich N, Carbonez P, Damet J, Lowe C, Healy J, Chernoglazov AI, Moghiseh M, Raja AY. Assessment of Material Identification Errors, Image Quality, and Radiation Doses Using Small Animal Spectral Photon-Counting CT. IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES 2021. [DOI: 10.1109/trpms.2020.3003260] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bernabei I, Sayous Y, Raja AY, Amma MR, Viry A, Steinmetz S, Falgayrac G, van Heeswijk RB, Omoumi P, Pascart T, Stamp LK, Nasi S, Hügle T, Busso N, So AK, Becce F. Multi-energy photon-counting computed tomography versus other clinical imaging techniques for the identification of articular calcium crystal deposition. Rheumatology (Oxford) 2021; 60:2483-2485. [DOI: 10.1093/rheumatology/keab125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 01/23/2021] [Indexed: 12/17/2022] Open
Affiliation(s)
- Ilaria Bernabei
- Department of Rheumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Yann Sayous
- Department of Physics and Astronomy, University of Canterbury
| | - Aamir Y Raja
- Department of Radiology, University of Otago, Christchurch, New Zealand
- Department of Physics, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Maya R Amma
- Department of Radiology, University of Otago, Christchurch, New Zealand
| | | | - Sylvain Steinmetz
- Department of Orthopaedics and Traumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Guillaume Falgayrac
- Marrow Adiposity and Bone Laboratory (MABLab), UR 4490, University of Lille, Lille, France
| | - Ruud B van Heeswijk
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Patrick Omoumi
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Tristan Pascart
- Marrow Adiposity and Bone Laboratory (MABLab), UR 4490, University of Lille, Lille, France
- Department of Rheumatology, Lille Catholic University Hospitals, University of Lille, Lille, France
| | - Lisa K Stamp
- Department of Medicine, University of Otago, Christchurch, New Zealand
| | - Sonia Nasi
- Department of Rheumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Thomas Hügle
- Department of Rheumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Nathalie Busso
- Department of Rheumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Alexander K So
- Department of Rheumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Fabio Becce
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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Budzik JF, Marzin C, Legrand J, Norberciak L, Becce F, Pascart T. Can Dual-Energy Computed Tomography Be Used to Identify Early Calcium Crystal Deposition in the Knees of Patients With Calcium Pyrophosphate Deposition? Arthritis Rheumatol 2020; 73:687-692. [PMID: 33131218 DOI: 10.1002/art.41569] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 10/27/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To assess the ability of dual-energy computed tomography (DECT) in identifying early calcium crystal deposition in menisci and articular cartilage of the knee, depending on the presence/absence of chondrocalcinosis seen on conventional CT. METHODS One hundred thirty-two knee DECT scans from patients with suspected crystal-associated arthropathy were reviewed and assigned to a calcium pyrophosphate deposition (CPPD) group (n = 50) or a control group (n = 82). Five DECT attenuation parameters were measured in preset regions of interest (ROIs) in menisci and articular cartilage and compared between groups using linear mixed models with adjustment for confounders. Subgroup analysis, excluding ROIs with chondrocalcinosis seen on conventional CT, was performed. RESULTS In both menisci and articular cartilage, and for all 5 DECT attenuation parameters, calcified ROIs in CPPD patients showed significantly higher values than ROIs in controls (P ≤ 0.036). Conversely, noncalcified ROIs in CPPD patients were comparable with those in controls (P ≥ 0.09). While specific DECT parameters yielded good accuracy (area under the curve [AUC] 0.87-0.88) in differentiating calcified ROIs in CPPD patients from ROIs in controls, DECT failed to distinguish between noncalcified ROIs in CPPD patients and controls (AUC 0.58-0.59). CONCLUSION While DECT has the potential to characterize knee intraarticular mineralization, this technique cannot yet accurately identify early calcium crystal deposition that is not visible as chondrocalcinosis on conventional CT.
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Affiliation(s)
- Jean-François Budzik
- Lille Catholic University Hospital Group, MABLab ULR 4490, University of Lille, Lille, France
| | - Claire Marzin
- Lille Catholic University Hospital Group, University of Lille, Lille, France
| | - Julie Legrand
- Lille Catholic University Hospital Group, University of Lille, Lille, France
| | - Laurène Norberciak
- Lille Catholic University Hospital Group, University of Lille, Lille, France
| | - Fabio Becce
- Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Tristan Pascart
- Lille Catholic University Hospital Group, MABLab ULR 4490, University of Lille, Lille, France
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Filippucci E, Reginato AM, Thiele RG. Imaging of crystalline arthropathy in 2020. Best Pract Res Clin Rheumatol 2020; 34:101595. [PMID: 33012644 DOI: 10.1016/j.berh.2020.101595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Crystal-related arthropathies are the result of crystal deposition in joint and periarticular soft tissues. Identification of urate crystals is mandatory to distinguish gout from other crystalline arthropathies, including calcium pyrophosphate dihydrate and basic calcium phosphate crystal deposition diseases. ACR/EULAR classification criteria for gout included dual-energy computed tomography and ultrasound with equal impact to the final score. Different diagnostic strengths of these imaging modalities depend on disease duration and scanned anatomic site. While ultrasound has been indicated as the first-choice imaging technique, especially in the early stages of the disease, dual-energy computed tomography has shown to be highly specific, allowing the detection of crystal deposits in anatomic sites not accessible by ultrasound, such as the spine. At the spinal level, MRI findings are usually nonspecific. Finally, there is preliminary evidence that at the knee, dual-energy computed tomography may discriminate calcium pyrophosphate dihydrate from basic calcium phosphate crystal deposits.
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Affiliation(s)
- Emilio Filippucci
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Jesi, Ancona, Italy.
| | - Anthony M Reginato
- Division of Rheumatology, Department of Dermatology, The Warren Alpert Medical School of Brown University, Providence, RI, USA.
| | - Ralf G Thiele
- Division of Allergy, Immunology and Rheumatology, Department of Medicine, University of Rochester, Rochester, NY, USA.
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Huber FA, Gkoumas S, Thüring T, Becce F, Guggenberger R. Detection and Characterization of Monosodium Urate and Calcium Hydroxyapatite Crystals Using Spectral Photon-Counting Radiography: A Proof-of-Concept Study. Eur J Radiol 2020; 129:109080. [DOI: 10.1016/j.ejrad.2020.109080] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 05/11/2020] [Accepted: 05/17/2020] [Indexed: 02/07/2023]
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Pascart T, Falgayrac G, Norberciak L, Lalanne C, Legrand J, Houvenagel E, Ea HK, Becce F, Budzik JF. Dual-energy computed-tomography-based discrimination between basic calcium phosphate and calcium pyrophosphate crystal deposition in vivo. Ther Adv Musculoskelet Dis 2020; 12:1759720X20936060. [PMID: 32636945 PMCID: PMC7315653 DOI: 10.1177/1759720x20936060] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 05/30/2020] [Indexed: 12/27/2022] Open
Abstract
Background: Dual-energy computed tomography (DECT) is being considered as a non-invasive diagnostic and characterization tool in calcium crystal-associated arthropathies. Our objective was to assess the potential of DECT in distinguishing between basic calcium phosphate (BCP) and calcium pyrophosphate (CPP) crystal deposition in and around joints in vivo. Methods: A total of 13 patients with calcific periarthritis and 11 patients with crystal-proven CPPD were recruited prospectively to undergo DECT scans. Samples harvested from BCP and CPP calcification types were analyzed using Raman spectroscopy and validated against synthetic crystals. Regions of interest were placed in BCP and CPP calcifications, and the following DECT attenuation parameters were obtained: CT numbers (HU) at 80 and 140 kV, dual-energy index (DEI), electron density (Rho), and effective atomic number (Zeff). These DECT attenuation parameters were compared and validated against crystal calibration phantoms at two known equal concentrations. Receiver operating characteristic (ROC) curves were plotted to determine the highest accuracy thresholds for DEI and Zeff. Results: Raman spectroscopy enabled chemical fingerprinting of BCP and CPP crystals both in vitro and in vivo. DECT was able to distinguish between HA and CPP in crystal calibration phantoms at two known equal concentrations, most notably by DEI (200 mg/cm3: 0.037 ± 0 versus 0.034 ± 0, p = 0.008) and Zeff (200 mg /cm3: 9.4 ± 0 versus 9.3 ± 0, p = 0.01) analysis. Likewise, BCP calcifications had significantly higher DEI (0.041 ± 0.005 versus 0.034 ± 0.005, p = 0.008) and Zeff (9.5 ± 0.2 versus 9.3 ± 0.2, p = 0.03) than CPP crystal deposits with comparable CT numbers in patients. With an area under the ROC curve of 0.83 [best threshold value = 0.0 39, sensitivity = 90. 9% (81.8, 97. 7%), specificity = 64.6% (50.0, 64. 6%)], DEI was the best parameter in distinguishing between BCP and CPP crystal depositions. Conclusion: DECT can help distinguish between crystal-proven BCP and CPP calcification types in vivo and, thus, aid in the diagnosis of challenging clinical cases, and in the characterization of CPP and BCP crystal deposition occurring in osteoarthritis.
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Affiliation(s)
- Tristan Pascart
- Department of Rheumatology, Lille Catholic Hospitals, Saint-Philibert Hospital, University of Lille, Rue du Grand But, Lomme, F-59160, France
| | - Guillaume Falgayrac
- EA 4490, PMOI, Physiopathologie des Maladies Osseuses Inflammatoires, University of Lille, Lille, France
| | - Laurène Norberciak
- Department of Medical Research, Biostatistics, Lille Catholic Hospitals, University of Lille, Lomme, France
| | - Clément Lalanne
- Department of Orthopaedic Surgery, Lille Catholic Hospitals, University of Lille, Lomme, France
| | - Julie Legrand
- Department of Diagnostic and Interventional Radiology, Lille Catholic Hospitals, University of Lille, Lomme, France
| | - Eric Houvenagel
- Department of Rheumatology, Lille Catholic Hospitals, University of Lille, Lomme, France
| | - Hang-Korng Ea
- Department of Rheumatology, Hôpital Lariboisière, AP-HP, Paris, France
| | - Fabio Becce
- Department of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jean-François Budzik
- EA 4490, PMOI, Physiopathologie des Maladies Osseuses Inflammatoires, University of Lille, Lille, France
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10
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Filippou G, Pascart T, Iagnocco A. Utility of Ultrasound and Dual Energy CT in Crystal Disease Diagnosis and Management. Curr Rheumatol Rep 2020; 22:15. [PMID: 32291581 DOI: 10.1007/s11926-020-0890-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW The objective of this review is to critically discuss the latest evidence on the use of ultrasound and dual energy computed tomography (DECT) for the assessment of microcrystalline arthritis. RECENT FINDINGS Both techniques have been included in the classification and diagnostic criteria for gout, while only ultrasound appears in the diagnostic recommendations for CPPD. Regarding the management of the diseases, there is encouraging evidence for the use of both techniques for the follow-up of gout patients, while very few or null data are available for CPPD. Ultrasound has been adequately validated for the diagnosis of CPPD, while some issues have still to be clarified regarding gout. DECT has also demonstrated to be accurate for gout diagnosis, but very few data are available regarding CPPD. Future research should aim to improve the reliability of both techniques and to create scoring systems for a more accurate follow-up of patients.
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Affiliation(s)
- Georgios Filippou
- Department of Medical Sciences, Section of rheumatology, Azienda ospedaliero-Universitaria Sant'Anna di Cona, University of Ferrara, via Aldo Moro, Ferrara, Italy
| | - Tristan Pascart
- Department of Rheumatology, Hôpital Saint-Philibert, Université Catholique de Lille, Lille, France
| | - Annamaria Iagnocco
- Dipartimento Scienze Cliniche e Biologiche, Academic Rheumatology Centre, Università degli Studi di Torino, Turin, Italy.
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