Photon-counting computed tomography in the assessment of rheumatoid arthritis-associated interstitial lung disease: an initial experience

PURPOSE: Interstitial lung disease (ILD) accounts for a significant proportion of mortality and morbidity in patients with rheumatoid arthritis (RA). The aim of this cross-sectional study is to evaluate the performance of novel photon-counting detector computed tomography (PCD-CT) in the detection of pulmonary parenchymal involvement. METHODS: Sixty-one patients with RA without a previous definitive diagnosis of ILD underwent high-resolution (HR) (0.4 mm slice thickness) and ultra-high-resolution (UHR) (0.2 mm slice thickness) PCDCT examination. The extent of interstitial abnormalities [ground-glass opacity (GGO), reticulation, bronchiectasis, and honeycombing] were scored in each lobe using a Likert-type scale. Total ILD scores were calculated as the sum of scores from all lobes. RESULTS: Reticulation and bronchiectasis scores were higher in the UHR measurements taken compared with the HR protocol [median (quartile 1, quartile 3): 2 (0, 3.5) vs. 0 (0, 3), P < 0.001 and 2 (0, 2) vs. 0 (0, 2), P < 0.001, respectively]; however, GGO and honeycombing scores did not differ [2 (2, 4) vs. 2 (2, 4), P = 0.944 and 0 (0, 0) vs. 0 (0, 0), P = 0.641, respectively]. Total ILD scores from both HR and UHR scans showed a mild negative correlation in diffusion capacity for carbon monoxide (HR: r = -0.297, P = 0.034; UHR: r = -0.294, P = 0.036). The pattern of lung parenchymal involvement did not differ significantly between the two protocols. The HR protocol had significantly lower volume CT dose index [0.67 (0.69, 1.06) mGy], total dose length product [29 (24.48, 33.2) mGy*cm] compared with UHR scans [8.18 (6.80, 9.23) mGy, P < 0.001 and 250 (218, 305) mGy*cm, P < 0.001]. CONCLUSION: UHR PCD-CT provides more detailed information on ILD in patients with RA than low-dose HR PCDCT. HR PCD-CT image acquisition with a low effective radiation dose may serve as a valuable, low-radiation screening tool in the selection of patients for further, higher-dose UHR PCD-CT screening.

Balneotherapy, a Complementary Non-pharmacological Approach for Non-Inflammatory Complaints in Systemic Lupus Erythematosus: A Pilot Study.

BACKGROUND/AIM: Despite remission or low disease activity non-inflammatory complaints like exhaustion, fatigue, and pain persist in a significant proportion of patients with systemic lupus erythematosus (SLE) and have a considerable impact on health-related quality of life. This study evaluated the effects of balneotherapy on non-inflammatory complaints, quality of life, and work productivity of patients with SLE. PATIENTS AND METHODS: SLE patients in remission/low disease activity in three rheumatology centers were included in this randomized, controlled, follow-up study. In addition to the standard of care (SOC), sixteen out of the thirty patients with SLE received balneotherapy (3-week period, 15 times, for 30 min) and fourteen patients received the SOC only. Pre-validated survey instruments including Lupus Quality of Life (LupusQoL), Short-Form Health Survey (SF-36), Work Productivity, and Activity Impairment-Lupus (WPAI-Lupus) questionnaires were used. RESULTS: Based on the SF-36 questionnaires, several subdomains of physical condition improved significantly after the course; the improvement remained durable (p=0.019). General health improved significantly by the end of the course (p=0.001). According to the LupusQoL questionnaire, physical health and pain showed a tendency of improvement shortly after the spa treatment. Changes in the WPAI-lupus questionnaire indicated a short-term improvement of the daily activity by the end of the observation period. No adverse reactions were observed. CONCLUSION: Thermal water therapy may be an effective, well-tolerated, complementary non-pharmacological approach for non-inflammatory complaints of patients with SLE. Physical condition improved in the short-term, whereas fatigue worsened despite treatment.