Fumio Hirano1,2, Waka Yokoyama-Kokuryo1,2, Hayato Yamazaki1,2, Michi Tsutsumino1,2, Ryoko Sakai1,2, Shiro Satoh3, Tomo Kimura3, Naoko Tojo4, Hitoshi Kohsaka1, Masayoshi Harigai1,2. 1. a Department of Rheumatology , Tokyo Medical and Dental University (TMDU) , Tokyo , Japan. 2. b Department of Pharmacovigilance , Tokyo Medical and Dental University (TMDU) , Tokyo , Japan. 3. c Department of Diagnostic Imaging , Ochanomizu Surugadai Clinic , Tokyo , Japan. 4. d Department of Clinical Laboratory , Medical Hospital, Tokyo Medical and Dental University (TMDU) , Tokyo , Japan.
Abstract
BACKGROUND: Fluorescence optical imaging with indocyanine-green enhancement (FOI) is a new imaging modality for the assessment of hand arthritis. The objective of this study was to compare performance profiles of clinical examination (CE), US and FOI using MRI as a reference in the same active rheumatoid arthritis (RA) patients. METHODS: CE, US, FOI and MRI were performed on six subjects with active RA. Each sequence of FOI was divided into three phases based on indocyanine-green dynamics and the joints were graded semi-quantitatively. Sensitivities and specificities of CE, US and FOI were calculated using the RAMRIS synovitis score >0 as a reference in a total of 30 joints (the second to fifth metacarpophalangeal (MCP) joints and the wrist of the clinically dominant hand). RESULTS: FOI showed sensitivities and specificities, respectively, of 85% and of 94% for Phase-1 and 69% and 94% for Phase-2. Sensitivities and specificities were 100% and 35% for CE (tender or swollen), 92% and 41% for gray scale US, and 77% and 100% for color-Doppler US. CONCLUSIONS: The performance characteristics of FOI in detection of synovitis in patients with active RA are comparable to those of US and more specific than CE. FOI has a potential as an assessment modality of RA.
BACKGROUND: Fluorescence optical imaging with indocyanine-green enhancement (FOI) is a new imaging modality for the assessment of hand arthritis. The objective of this study was to compare performance profiles of clinical examination (CE), US and FOI using MRI as a reference in the same active rheumatoid arthritis (RA) patients. METHODS: CE, US, FOI and MRI were performed on six subjects with active RA. Each sequence of FOI was divided into three phases based on indocyanine-green dynamics and the joints were graded semi-quantitatively. Sensitivities and specificities of CE, US and FOI were calculated using the RAMRIS synovitis score >0 as a reference in a total of 30 joints (the second to fifth metacarpophalangeal (MCP) joints and the wrist of the clinically dominant hand). RESULTS: FOI showed sensitivities and specificities, respectively, of 85% and of 94% for Phase-1 and 69% and 94% for Phase-2. Sensitivities and specificities were 100% and 35% for CE (tender or swollen), 92% and 41% for gray scale US, and 77% and 100% for color-Doppler US. CONCLUSIONS: The performance characteristics of FOI in detection of synovitis in patients with active RA are comparable to those of US and more specific than CE. FOI has a potential as an assessment modality of RA.
Entities:
Keywords:
Fluorescence optical imaging; magnetic resonance imaging; rheumatoid arthritis; ultrasonography
Authors: A Schmidt; A M Glimm; I K Haugen; P Hoff; G Schmittat; G R Burmester; J Klotsche; S Ohrndorf Journal: Arthritis Res Ther Date: 2020-08-18 Impact factor: 5.156