Pre-examinations Improve Automated Metastases Detection on Cranial MRI

Materials and methods: First, a dual-time approach was assessed, for which the CNN was provided sequences of the MRI that initially depicted new MM (diagnosis MRI) as well as of a prediagnosis MRI: inclusion of only contrast-enhanced T1-weighted images (CNNdual_ce) was compared with inclusion of also the native T1-weighted images, T2-weighted images, and FLAIR sequences of both time points (CNNdual_all).Second, results were compared with the corresponding single time approaches, in which the CNN was provided exclusively the respective sequences of the diagnosis MRI.Casewise diagnostic performance parameters were calculated from 5-fold cross-validation. Results: In total, 94 cases with 494 MMs were included. Overall, the highest diagnostic performance was achieved by inclusion of only the contrast-enhanced T1-weighted images of the diagnosis and of a prediagnosis MRI (CNNdual_ce, sensitivity = 73%, PPV = 25%, F1-score = 36%). Using exclusively contrast-enhanced T1-weighted images as input resulted in significantly less false-positives (FPs) compared with inclusion of further sequences beyond contrast-enhanced T1-weighted images (FPs = 5/7 for CNNdual_ce/CNNdual_all, P < 1e-5). Comparison of contrast-enhanced dual and mono time approaches revealed that exclusion of prediagnosis MRI significantly increased FPs (FPs = 5/10 for CNNdual_ce/CNNce, P < 1e-9).Approaches with only native sequences were clearly inferior to CNNs that were provided contrast-enhanced sequences. Conclusions: Automated MM detection on contrast-enhanced T1-weighted images performed with high sensitivity. Frequent FPs due to artifacts and vessels were significantly reduced by additional inclusion of prediagnosis MRI, but not by inclusion of further sequences beyond contrast-enhanced T1-weighted images. Future studies might investigate different change detection architectures for computer-aided detection

Comparative Research on the Metropolitan Administration and Service in Porto

The Porto Metropolitan Area (Área Metropolitana do Porto, AMP) is a framework of cooperation between 17 municipalities and several districts. This metropolitan area has a specific, inter-municipal model of urban governance. In our research, we found that cooperation is significant mainly in sectors where the central legislature has essentially made this mandatory, by designing the AMP and defining its powers. In addition to AMP, only partial cooperation has been established in the field of waste management, and in the field of human public services and in the performance of public authority, there is essentially a set of autonomous organisational solutions. However, despite all this fragmentation, the above system ensures the satisfactory functioning of the metropolitan agglomeration. This also underlines the importance of transport management in urban areas, since this functioning system is based on an integrated and intermodal transport system

Badania porównawcze administracji i usług metropolitalnych w Porto

The Porto Metropolitan Area (Área Metropolitana do Porto, AMP) is a framework of cooperation between 17 municipalities and several districts. This metropolitan area has a specific, inter-municipal model of urban governance. In our research, we found that cooperation is significant mainly in sectors where the central legislature has essentially made this mandatory, by designing the AMP and defining its powers. In addition to AMP, only partial cooperation has been established in the field of waste management, and in the field of human public services and in the performance of public authority, there is essentially a set of autonomous organisational solutions. However, despite all this fragmentation, the above system ensures the satisfactory functioning of the metropolitan agglomeration. This also underlines the importance of transport management in urban areas, since this functioning system is based on an integrated and intermodal transport systemObszar metropolitalny Porto (Área Metropolitana do Porto, AMP) składa się z 17 gmin i kilku okręgów. Przyjęto tu specyficzny, międzygminny model zarządzania. Na podstawie przeprowadzonych badań stwierdzono, że współpraca jest znacząca głównie w sektorach, którym centralny prawodawca zasadniczo nadał taki obowiązek, projektując AMP i określając jego uprawnienia. Oprócz AMP nawiązano jedynie częściową współpracę w zakresie gospodarki odpadami, a w zakresie usług publicznych i wykonywania władzy publicznej istnieje w zasadzie zestaw autonomicznych rozwiązań organizacyjnych. Pomimo całego tego rozdrobnienia system ten zapewnia odpowiednie funkcjonowanie aglomeracji metropolitalnej. Istotne jest również zarządzanie transportem na obszarach miejskich, ponieważ jest ono oparte na zintegrowanym i intermodalnym systemie transportowym