scholarly journals OP0057 Fluorescence optical imaging in juvenile idiopathic polyarticular disease before and during antirheumatic treatment

2017 ◽  
Author(s):  
A Klein ◽  
G-W Just ◽  
SG Werner ◽  
I Becker ◽  
P Oommen ◽  
...  
Keyword(s):  
Optical Imaging ◽  
Fluorescence Optical Imaging ◽  
Polyarticular Disease

scholarly journals AB1138 ASSESSMENT OF FLUORESCENCE-OPTICAL IMAGING TECHNIQUE OF THE HANDS IN PSORIASIS AND PSORIATIC PATIENTS USING AN INNOVATIVE OBJECTIVE METHOD

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1859.2-1859
Author(s):  
L. Zerweck ◽  
U. Henkemeier ◽  
P. H. Nguyen ◽  
T. Rossmanith ◽  
A. Pippow ◽  
...  
Keyword(s):  
Time Series ◽  
Early Detection ◽  
Optical Imaging ◽  
Skin Diseases ◽  
Imaging Biomarkers ◽  
Research Support ◽  
Scoring Method ◽  
Inflammatory Skin Diseases ◽  
Data Set ◽  
Fluorescence Optical Imaging

Background:Psoriasis (Pso) is one of the most common chronic inflammatory skin diseases in Europe. Psoriatic arthritis (PsA) is closely associated to Pso whereas the skin manifestation appears usually years before PsA-related symptoms emerge. Up to 30% of Pso patients develop PsA, biomarkers for its early detection are of major importance. In early PsA, changes in synovial vascularisation appear first. Imaging biomarkers for detection of changes in vascularisation might be useful for early detection of musculoskeletal disease. Fluorescence-optical imaging (FOI) is a new method to detect changes in microvascularisation of the hands. Each collected data set of the FOI system contains 360 images representing a time progression of the indocyanine green (ICG) distribution.Objectives:To evaluate a reader-independent assessment method for evaluation of FOI in patients with PsO and PsA.Methods:A prospective study including patients with dermatological confirmed skin PsO was performed. 411 patients were included from German dermatology units without PsA diagnosis but potential risk for its development. Clinical examination (CE) was performed by a qualified rheumatologist. For a reader independent evaluation of the FOI images an objective joint-based scoring method was developed. For this method, the joint areas are defined by image segmentation and scored based on generated heatmaps. To calculate a heatmap indicating conspicuous joints from a data set containing 360 images, each pixel is converted to a time series containing 360 values. From this time series, three independent values (features) are extracted: amplitude, average value and maximal slope. Thus, each pixel is reduced to three different feature values. After the three features are determined for each pixel, k-means clustering is performed on each feature. The numbers of centroids (k) are set to 3, 5, 7 and 9. 12 heatmaps (3 features à 4 ks) are calculated, which results in 12 scores for each joint as well. The clusters are then sorted dependent on their centroid value and coloured accordingly to a predefined heatmap colour palette. To finally score each joint, the pixels in the segmented joint area and their assigned cluster are summed and normalized by the area’s amount of pixels and k.Results:271 of the patients were investigated by the newly developed method and compared with the CE scoring. 6426 joints were labeled as healthy whereas 1162 joints were either labeled as swollen, tender or both. The result over all investigated patients for k = 9 is summed in table 1. It is observable that every average and median healthy value is lower than the corresponding affected value.Table 1.Resulting scores for k = 9 for all 271 patients.Feature Statistic valueAmplitudeMeanSlopeHealthyAffectedHealthyAffectedHealthyAffectedAverage0.5030.5280.4860.5090.3950.414Median0.4960.5320.4820.5050.3890.415Conclusion:FOI is an innovative method that detects early changes in vascularization of the hands. So, this method can be useful in early detection of arthritis especially in risk populations such as PsO patients. The results of the objective scoring method show that a clear distinction between healthy and affected joints is possible with the average scores as well as the median values. However, if the range of the scores is considered, the overlap between healthy and affected is not neglectable. Thus, the current scoring system can be used as an indicator but not as a single classification marker. Nevertheless, the research at hand has shown the expected outcome and motivates further development on the heatmap approach.Disclosure of Interests:Lukas Zerweck: None declared, Ulf Henkemeier: None declared, Phuong-Ha Nguyen: None declared, Tanja Rossmanith Grant/research support from: Janssen, BMS, LEO, Pfizer, Andreas Pippow: None declared, Harald Burkhardt Grant/research support from: Pfizer, Roche, Abbvie, Consultant of: Sanofi, Pfizer, Roche, Abbvie, Boehringer Ingelheim, UCB, Eli Lilly, Chugai, Bristol Myer Scripps, Janssen, and Novartis, Speakers bureau: Sanofi, Pfizer, Roche, Abbvie, Boehringer Ingelheim, UCB, Eli Lilly, Chugai, Bristol Myer Scripps, Janssen, and Novartis, Frank Behrens Grant/research support from: Pfizer, Janssen, Chugai, Celgene, Lilly and Roche, Consultant of: Pfizer, AbbVie, Sanofi, Lilly, Novartis, Genzyme, Boehringer, Janssen, MSD, Celgene, Roche and Chugai, Michaela Köhm Grant/research support from: Pfizer, Janssen, BMS, LEO, Consultant of: BMS, Pfizer, Speakers bureau: Pfizer, BMS, Janssen, Novartis

scholarly journals Fluorescence optical imaging: ready for prime time?

RMD Open ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. e001497
Author(s):  
Sarah Ohrndorf ◽  
Anne-Marie Glimm ◽  
Mads Ammitzbøll-Danielsen ◽  
Mikkel Ostergaard ◽  
Gerd R Burmester
Keyword(s):  
Optical Imaging ◽  
Power Doppler ◽  
Joint Inflammation ◽  
Diagnostic Process ◽  
The Novel ◽  
The European Union ◽  
Fluorescence Optical Imaging ◽  
Disturbed Microcirculation ◽  
The Usa ◽  
Magnetic Resonance Imaging Mri

The novel technique of fluorescence optical imaging (FOI, Xiralite), which is approved in the European Union and the USA for clinical use, has been the object of studies since 2009. Indocyanine green-based FOI can demonstrate an impaired microcirculation caused by inflammation in both hands in one examination. Several studies have investigated FOI for detection of joint inflammation by comparing FOI to magnetic resonance imaging (MRI) and/or musculoskeletal ultrasound (MSUS). The results have shown a generally good agreement (>80%) between FOI and clinical examination, MRI and MSUS by power Doppler in inflammatory joint diseases. Moreover, characteristic enhancements in skin and nails are seen in PsA, which potentially can be useful in the diagnostic process of early undifferentiated arthritis. Furthermore, FOI has been investigated for the visualisation of a disturbed microcirculation in the hands and fingers of patients with systemic sclerosis (SSc), highlighting the potential of monitoring vascular changes in SSc and other vasculopathies. The available data indicate that it is time to consider FOI as a useful part of the imaging repertoire in rheumatology clinical practice, particularly where MSUS and MRI are not easily available.

Strategies to minimize background autofluorescence in live mice during noninvasive fluorescence optical imaging

Lab Animal ◽  
2007 ◽  
Vol 36 (8) ◽  
pp. 40-43 ◽  
Author(s):  
Srabani Bhaumik ◽  
Jeannette DePuy ◽  
June Klimash
Keyword(s):  
Optical Imaging ◽  
Fluorescence Optical Imaging

SAT0416 Interreader-reliability of standardized evaluation of ICG-enhanced fluorescence-optical imaging:

2013 ◽  
Vol 71 (Suppl 3) ◽  
pp. 613.1-613
Author(s):  
S.G. Werner ◽  
U. Käßer ◽  
C. Amberger ◽  
M. Piesga ◽  
F. Spiecker ◽  
...  
Keyword(s):  
Optical Imaging ◽  
Enhanced Fluorescence ◽  
Fluorescence Optical Imaging

Near-infrared Fluorescence Optical Imaging in Early Rheumatoid Arthritis: A Comparison to Magnetic Resonance Imaging and Ultrasonography

2015 ◽  
Vol 42 (7) ◽  
pp. 1112-1118 ◽  
Author(s):  
Michaela Krohn ◽  
Sarah Ohrndorf ◽  
Stephanie G. Werner ◽  
Bernd Schicke ◽  
Gerd-Rüdiger Burmester ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Optical Imaging ◽  
Early Rheumatoid Arthritis ◽  
Near Infrared ◽  
Resonance Imaging ◽  
Near Infrared Fluorescence ◽  
Fluorescence Optical Imaging ◽  
Early Ra

Objective.Near-infrared fluorescence optical imaging (FOI) is a novel imaging technology in the detection and evaluation of different arthritides. FOI was validated in comparison to magnetic resonance imaging (MRI), greyscale ultrasonography (GSUS), and power Doppler ultrasonography (PDUS) in patients with early rheumatoid arthritis (RA).Methods.Hands of 31 patients with early RA were examined by FOI, MRI, and US. In each modality, synovitis of the wrist, metacarpophalangeal joints (MCP) 2–5, and proximal interphalangeal joints (PIP) 2–5 were scored on a 4-point scale (0–3). Sensitivity and specificity of FOI were analyzed in comparison to MRI and US as reference methods, differentiating between 3 phases of FOI enhancement (P1–3). Intraclass correlation coefficients (ICC) were calculated to evaluate the agreement of FOI with MRI and US.Results.A total of 279 joints (31 wrists, 124 MCP and 124 PIP joints) were evaluated. With MRI as the reference method, overall sensitivity/specificity of FOI was 0.81/0.00, 0.49/0.84, and 0.86/0.38 for wrist, MCP, and PIP joints, respectively. Under application of PDUS as reference, sensitivity was even higher, while specificity turned out to be low, except for MCP joints (0.88/0.15, 0.81/0.76, and 1.00/0.27, respectively). P2 appears to be the most sensitive FOI phase, while P1 showed the highest specificity. The best agreement of FOI was shown for PDUS, especially with regard to MCP and PIP joints (ICC of 0.57 and 0.53, respectively), while correlation with MRI was slightly lower.Conclusion.FOI remains an interesting diagnostic tool for patients with early RA, although this study revealed limitations concerning the detection of synovitis. Further research is needed to evaluate its full diagnostic potential in rheumatic diseases.

A Novel Fluorescence Optical Imaging Scoring System for Hand Synovitis in Rheumatoid Arthritis – validity and agreement with ultrasound

Rheumatology ◽  
2021 ◽  
Author(s):  
Mads Ammitzbøll Danielsen ◽  
Daniel Glinatsi ◽  
Lene Terslev ◽  
Mikkel Østergaard
Keyword(s):  
Rheumatoid Arthritis ◽  
Optical Imaging ◽  
Scoring System ◽  
Moderate Correlation ◽  
Treatment Intensification ◽  
Fluorescence Optical Imaging ◽  
Reliable Assessment ◽  
Intraclass Correlations ◽  
Reader Reliability ◽  
Foie Gras

Abstract Objectives To develop and validate a new semiquantitative Fluorescence Optical Imaging (FOI) scoring system – the FOI Enhancement-Generated rheumatoid arthritis (RA) Score (FOIE-GRAS) for synovitis assessment in the hand. Methods The development of FOIE-GRAS was based on consensus of 4 experts in musculoskeletal imaging. Forty-six RA patients, eligible for treatment intensification and with ≥1 clinically swollen joint in the hands and 11 healthy controls were included. FOI, ultrasound and clinical assessment of both hands were obtained at baseline and for RA patients after 3- and 6-months’ follow-up. Twenty RA patients had an FOI rescan after 4 hours. Synovitis was scored using FOIE-GRAS and the OMERACT ultrasound synovitis scoring system. All FOI images were scored by 2 readers. Inter-scan, inter-and intra-reader reliability were determined. Furthermore, FOIE-GRAS agreement with ultrasound and responsiveness was assessed. Results FOIE-GRAS synovitis was defined as early enhancement and scores based on the degree of coverage of the specific joint region after 3 seconds (0–3). Inter-scan, intra- and inter-reader intraclass correlations coefficients (ICC) were good-excellent for all baseline scores (0.76-0.98) and moderate-to-good for change (0.65-76). The FOIE-GRAS had moderate agreement with ultrasound (ICC 0.30-0.54) for total score, a good standardized response mean (>0.80), and moderate correlation with clinical joint assessment and DAS28-CRP. The median (IQR) reading time per FOI examination was 133 (109;161) seconds. Scores were significantly lower in controls 1(0;4) than RA patients 11(6;19). Conclusion The FOIE-GRAS offers a feasible and reliable assessment of synovitis in RA, with a moderate correlation with ultrasound and DAS28CRP, and good responsiveness.

AB0609 Fluorescence Optical Imaging of Inflammation in Systemic Sclerosis – A Pilot Study

2014 ◽  
Vol 73 (Suppl 2) ◽  
pp. 1007.2-1007
Author(s):  
A. Pfeil ◽  
K.F. Drummer ◽  
J. Boettcher ◽  
C. Jung ◽  
P. Oelzner ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Pilot Study ◽  
Optical Imaging ◽  
Fluorescence Optical Imaging
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