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Background: Diaphragmatic paralysis is one the causes of dyspnoea and difficulty in breathing. There are many causes of diaphragmatic paralysis, especially trauma and iatrogenic injury of phrenic nerve. Usually, diaphragmatic paralysis diagnosis depends on fluoroscopic examination of diaphragmatic displacement during sharp sniffs. However, due to disadvantages of fluoroscopic examination, the trend for less radiation examination by using ultrasound is increasing especially using M-mode for detection of diaphragmatic motion during respiration. Case: A new-born baby boy with uneventful pregnancy and normal delivery with good general condition, developed severe respiratory distress at 3rd day of life and was diagnosed to have bilateral pneumothorax. Bilateral chest tubes were inserted with improvement of his condition. The baby then started to develop desaturation with serial chest x-rays done and showed elevated left hemi-diaphragm. Suspicion toward left hemi-diaphragm paralysis increased and due to his general condition, fluoroscopic examination was difficult. So that, Ultrasound with M-mode was used with diagnosis of the patient with left hemi-diaphragmatic paralysis. Conclusion: Ultrasound and the using of M-mode in detection of diaphragmatic motion is one of the most important and applicable diagnostic procedure for diagnosis of diaphragmatic weakness and paralysis.

Objective.Intra- and interreader reliability, construct validity, and responsiveness of the Spondyloarthritis Research Consortium of Canada (SPARCC) magnetic resonance imaging (MRI) scoring system were investigated for scoring sacroiliitis in patients with juvenile spondyloarthritis (JSpA)/enthesitis-related arthritis (ERA) who have received biologic and/or nonbiologic treatment.Methods.Ninety whole-body MRI examinations with dedicated oblique coronal planes of the sacroiliac joints in 46 patients were independently reviewed and scored by 2 pediatric musculoskeletal radiologists, blinded to clinical details, using the SPARCC system. Intra- and interreader reliability was assessed by intraclass correlation coefficients (ICC). Construct validity testing was done by (1) correlating the SPARCC MRI scores of sacroiliitis with clinical disease activity indicators (cross-sectional validity), and (2) correlating the change in the MRI score with the change in clinical indicators before and after treatment (longitudinal validity). Responsiveness of the MRI and clinical indicators was also evaluated, grouped by biologic and nonbiologic treatment.Results.When applied in children with JSpA/ERA, the SPARCC showed almost perfect intra- and interreader reliability (ICC 0.79–1.00). There was poor cross-sectional and longitudinal correlation between clinical assessment indicators and MRI scoring. SPARCC scores showed higher responsiveness to treatment-related change than most clinical outcome measures. Three clinical outcome measures correlated longitudinally with SPARCC score in nonbiologic treatment: active joint count (r = 0.72, p < 0.001), FABER (Flexion, Abduction, External Rotation) test (r = 0.58, p = 0.012), and physician’s global assessment (r = 0.61, p = 0.034).Conclusion.The SPARCC MRI scoring system is a reliable tool with relatively higher responsiveness than clinical indicators and is suitable for objective quantification of sacroiliitis when applied to pediatric patients with JSpA/ERA.