MRI images demonstrate widespread abnormalities in digits of people with psoriatic arthritis. Tender dactylitic digits have more abnormalities than other digits but the relationship between clinical and MRI scores is not strong.

Musculoskeletal (MSK) ultrasound performed by non-medical practitioners is a developing practice. The aim of this paper is:(1) to audit an experienced sonographer's (SJR) performance after one year's independent reporting against two experienced MSK radiologists (CJG, MC); and (2) to establish an audit standard against which such role development might be contrived. Images and reports from 250 MSK ultrasound examinations performed by a sonographer (SJR) were reviewed independently by two consultant MSK radiologists (CJG and MC). The examinations were graded for discrepancy, e.g. grade 1 -agree with the sonographer report; grade 2 -minor discrepancy unlikely to alter patient care; grade 3 -potentially significant discrepancy; grade 4 -definite, significant discrepancy likely to have adverse consequences for patient care. Two of 250 (0.8%) cases were excluded. Both radiologists agreed completely with the sonographer (grade 1) in 235 of the 248 cases (94.8%). In 13 cases there was discrepancy between the reports of SJR and the radiologists. The discrepancy was grade 2 in six of the 248 cases (2.4%), grade 3 in six of the 248 cases (2.4%) and grade 4 in one of the 248 cases (0.4%). In conclusion, this audit shows a high level of agreement between the sonographer and the consultant MSK radiologist reporting of MSK ultrasound. This level of agreement may set the standard for future quality assurance audit of sonographer MSK reporting.Over the last 20 years there has been a gradual rise in the number of non-medical imaging health professionals performing and independently reporting ultrasound examinations. 1,2 Such a development has taken place in line with recommendations from the professional bodies; The Royal College of Radiologists and The Society of Radiographers and national government initiatives for skill-mix and role extension, primarily in order to meet increasing service demand. 3 -7 Early evidence showed that sonographers were able to produce general medical ultrasound reports to a similar standard as those of radiologists, thus generating a degree of confidence in independent sonographer reporting. 8,9 Further studies showed high diagnostic accuracy and good agreement for independent radiologist and sonographer reporting of abdominal and pelvic ultrasound. 10,11 Non-medical practitioners have been involved in musculoskeletal (MSK) ultrasound for many years but this is still a developing practice. Recent publications in certain areas of MSK ultrasound show involvement of non-medical practitioners, e.g. inter-operator agreement studies in shoulder ultrasound, and radiologist versus podiatrist in rheumatoid MSK ultrasound of the forefoot. 12 -14 To our knowledge, there are no research or audit studies assessing sonographer reporting of MSK ultrasound examinations.In 2007, in order to meet service requirements, responsibility for performance and reporting of MSK ultrasound was delegated to a newly-appointed sonographer (SJR) with eight years MSK ultrasound experience gained at a different institution. This adva...

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IntroductionThe purpose of the current study was to examine the painful elbow, and in particular enthesitis, in psoriatic arthritis (PsA) and rheumatoid arthritis (RA) using clinical examination, ultrasonography (US) and magnetic resonance imaging (MRI).MethodsPatients with elbow pain (11 with PsA and 9 with RA) were recruited. Clinical examination, US and MRI studies were performed on the same day. For enthesitis, the common extensor and flexor insertions and the triceps insertion were imaged (20 patients, giving a total of 60 sites with comparative data). Imaging was performed with the radiologists blinded to the diagnosis and clinical findings. US was used to assess ‘inflammatory activity’ (Power Doppler signal, oedema, tendon thickening and bursal swelling) and ‘damage’ (erosions, cortical roughening and enthesophytes). MRI was used to assess ‘inflammation’ (fluid in paratenon, peri-entheseal soft-tissue oedema, entheseal enhancement with gadolinium, entheseal oedema and bone oedema) and ‘damage’ (erosion, cortical roughening and enthesophyte).ResultsComplete scan data were not available for all patients as one patient could not tolerate the MRI examination. No significant differences in imaging scores were found between PsA and RA. Analysis of damage scores revealed complete agreement between US and MRI data in 43/55 (78%) comparisons; in 10/55 (18%) cases the US data were abnormal but the MRI data normal; in 2/55 (4%) cases, the MRI data were abnormal and the US data normal. Analysis of the inflammation scores revealed complete agreement between US and MRI data in 33/55 (60%) comparisons; in 3/55 (5%) cases US data were abnormal but MRI data normal; in 19/55 (35%) cases the MRI data were abnormal and the US data normal. There was a poor relationship between assessments based on clinical examination and imaging studies. Readers could not accurately identify the disease from imaging findings.ConclusionBased on our results, at the elbow, US and MR have different roles in assessing enthesitis, with US apparently the better diagnostic tool for assessing damage and MR the better tool for assessing inflammation. In this study enthesitis and synovitis in the painful elbow were found equally in cases of established RA and PsA.

Objective. To compare scores for the Leeds enthesitis index in psoriatic arthritis and rheumatoid arthritis using clinical assessment and ultrasonography (US). Design. Swelling and tenderness of the enthesis was assessed at six sites: lateral epicondyles of humerus (LE), medial condyles of femur (MC), and the insertion of the Achilles tendon (AT). US assessed “inflammatory activity” (power Doppler signal, oedema, tendon thickening, and bursal swelling) and “damage” (erosions and enthesophytes). Results. 94 patients were included, 71 with PsA and 23 with RA. The patients with RA were significantly older (PsA 47.6 years; RA 62.6 years; (mean difference in ages =15.0 years, 95% CI 9.3–20.7 years)). US scores were higher in RA at the LE, significantly so for the “damage” scores. No differences between RA and PsA were seen at the other sites. As a result, the odds ratio for PsA, given an US score above the median, was 0.41 (0.13–1.03). However, using the clinical score, the odds ratio for PsA was 2.16 (0.81–5.70). Conclusions. Although clinical scores of enthesitis are greater in PsA compared to RA, US enthesitis scores did not distinguish between RA and PsA. This may in part be due to more frequent juxta-articular involvement in RA and in part due to the older age of the subjects with RA.

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