Hochschule für Angewandte Psychologie FHNW

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    Publikation
    How realistic is threat image projection for X-ray baggage screening?
    (MDPI, 13.03.2022) Riz à Porta, Robin; Sterchi, Yanik; Schwaninger, Adrian
    At airports, security officers (screeners) inspect X-ray images of passenger baggage in order to prevent threat items (bombs, guns, knives, etc.) from being brought onto an aircraft. Because threat items rarely occur, many airports use a threat-image-projection (TIP) system, which projects pre-recorded X-ray images of threat items onto some of the X-ray baggage images in order to improve the threat detection of screeners. TIP is regulatorily mandated in many countries and is also used to identify officers with insufficient threat-detection performance. However, TIP images sometimes look unrealistic because of artifacts and unrealistic scenarios, which could reduce the efficacy of TIP. Screeners rated a representative sample of TIP images regarding artifacts identified in a pre-study. We also evaluated whether specific image characteristics affect the occurrence rate of artifacts. 24% of the TIP images were rated to display artifacts and 26% to depict unrealistic scenarios, with 34% showing at least one of the two. With two-thirds of the TIP images having been perceived as realistic, we argue that TIP still serves its purpose, but artifacts and unrealistic scenarios should be reduced. Recommendations on how to improve the efficacy of TIP by considering image characteristics are provided.
    01A - Beitrag in wissenschaftlicher Zeitschrift
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    Publikation
    POCUS – Computer-based Training for Improving the Quality of Ultrasonic Findings in Gallbladder Changes
    (Hochschule für Angewandte Psychologie FHNW, 08.09.2022) Lehmann, Manuela; Michel, Stefan; CASRA, Hardmeier Diana
    Point-of-care-ultrasound (POCUS) gains attention and is increasingly used in the medical community as it is applied by attending physicians. However, the lack of training in visual search in medicine put the success of POCUS at risk. The medical community requires standardized training. An attempt at that is shown in the presented study. Medical students (n = 14) who conducted an oral presentation as a passive learning method, followed by a computer-based training as an active learning method could increase their proportion of correct responses for ultrasound images of the gallbladder significantly compared to students who only conducted the passive learning method (n = 16) or no training at all (n = 16). Participants also mentioned their interest in an online training tool for their own universities. The successful application of POCUS would increase patient safety and lowers medical costs, but sufficient training is needed to fulfill these advantages. This paper contains 97’023 characters (incl. spaces, without appendices).
    11 - Studentische Arbeit