[Interviewer effects in assessing subjective quality of life and satisfaction with care in sheltered housing]. / Interviewereffekte bei der Erhebung subjektiver Lebensqualität und der Zufriedenheit mit der Betreuung im Betreuten Wohnen.

The impact of interviewer-effects on subjective evaluative criteria was examined in a randomized control group design (n = 26 x 2) of clients of sheltered living in Berlin-Spandau. The assessment of care and subjective quality of life showed that clients were more satisfied if they had been interviewed by their responsible caregivers compared to interviewers from other providers of the same region--unknown to the clients. Conductibility of interviews was independent of interview conditions. A systematic overestimation of satisfaction should be taken into account if responsible caregivers interview their own clients. Such data should not be used comparing different settings.

[Optimization of filtration and lighting parameters in pictures of the hand using digital luminescence radiography]. / Optimierung der Filterung und Belichtungsparameter von Aufnahmen der Hand mit der digitalen Lumineszenzradiographie.

The appearance of digital radiographs were markedly influenced by post-processing. To optimise images of the hand, radiographs of 7 patients with arthritis were modified by various filters. 6 observers evaluated the presence or absence of erosive changes during an ROC study and the advantages of low filtration were demonstrated. Further images were prepared of anatomical preparations in which para-articular defects had been made and of a hand phantom covered in perforated plexiglass. Limited filtration and low enhancement factors again provided the best results. Dose reduction of 50% resulted in a significant deterioration in the ability to recognise erosions and artificial lesions.