Wyniki wyszukiwania - Biblioteka Nauki

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Enhanced CAE system for detection of exudates and diagnosis of diabetic retinopathy stages in fundus retinal images using soft computing techniques

100%

Janaki S. D. , Geetha K.

Polish Journal of Medical Physics and Engineering

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2019

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tom Vol. 25, Iss. 2

131--139

EN

Diabetic Retinopathy (DR) is one of the leading causes of visual impairment. Diabetic Retinopathy is the most recent technique of identifying the intensity of acid secretion in the eye for diabetic patients. The identification of DR is performed by visual analysis of retinal images for exudates (fat deposits) and the main patterns are traced by ophthalmologists. This paper proposes a fully automated Computer Assisted Evaluation (CAE) system which comprises of a set of algorithms for exudates detection and to classify the different stages of Diabetics Retinopathy, which are identified as either normal or mild or moderate or severe. Experimental validation is performed on a real fundus retinal image database. The segmentation of exudates is achieved using fuzzy C-means clustering and entropy filtering. An optimal set obtained from the statistical textural features (GLCM and GLHM) is extracted from the segmented exudates for classifying the different stages of Diabetics Retinopathy. The different stages of Diabetic Retinopathy are classified using three classifiers such as Back Propagation Neural Network (BPN), Probabilistic Neural Network (PNN) and Support Vector Machine (SVM). The experimental results show that the SVM classifiers outperformed other classifiers for the examined fundus retinal image dataset. The results obtained confirm that with new a set of texture features, the proposed methodology provides better performance when compared to the other methods available in the literature. These results suggest that our proposed method in this paper can be useful as a diagnostic aid system for Diabetic Retinopathy.

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Dual-attention EfficientNet based on multi-view feature fusion for cervical squamous intraepithelial lesions diagnosis

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Guo Y. , Wang Y. , Yang H. , Zhang J. , Sun Q.

Biocybernetics and Biomedical Engineering

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2022

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tom Vol. 42, no. 2

529--542

EN

Cervicograms are widely used in cervical cancer screening but exhibit a high misdiagnosis rate. Even senior experts show only 48% specificity on clinical examinations. Most existing methods only use single-view images applied with acetic acid or Lugol’s iodine solution as their input data, ignoring the fact that non-pathological tissues may show false-positive reactions in these single-view images. This can lead to misdiagnosis in clinical diagnosis. Therefore, it is essential to extract features from multi-view colposcopy images (including the original images) as inputs, because three-view cervicograms provide complementary information. In this work, we propose an improved EfficientNet based on multi-view feature fusion for the automatic diagnosis of cervical squamous intraepithelial lesions. Specifically, EfficientNet-B0 is employed as the backbone network, and three-view images are taken as inputs by channel cascading to reduce misclassification. Additionally, we propose a dual-attention mechanism that implements the feature selection function based on Convolution Block Attention Module (CBAM) and Coordinate Attention (CA). These two attention mechanisms assist each other to enhance the feature representation of HSIL. We leverage a dataset of 3294 clinical cervigrams and obtain 90.0% accuracy with recall, specificity, and F1-Score of 87.1%, 93.0%, and 89.7%, respectively. Experimental results prove that this method can help clinicians with precise disease classification and diagnosis, and out-performs known related works.

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Sytuacja osób transpłciowych w więzieniu – przegląd standardów międzynarodowych i praktyki

67%

Lasocik Z.

Praca Socjalna

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2023

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tom 38(2)

81-104

EN

The situation of transgender people in prison is very difficult, mainly because of their sense of security, but also because of their specific needs in terms of medical care and social support. Contemporary culture is more and more “sensitive” to the situation of specific social groups, such as seniors, LGBT people or people experiencing gender incompatibility. As for the last category, it is only from January 1, 2022 in the new WHO classification of diseases, the phenomenon of transgenderism is no longer treated as a health disorder. The article is an attempt to review international legal standards concerning the conduct towards such persons and the provisions regulating their functioning in conditions of deprivation of liberty. My goal is to follow the evolution of these standards and to demonstrate good and bad practices in different countries. One of the guiding principles of the modern penitentiary system is the separation of people of different sex, motivated by the need to protect women. From this point of view, the execution of punishment against a transgender person is a difficult challenge for a penitentiary institution, mainly logistical, leading to the dilemma in which facility should such a person be placed, or how to choose the best punishment regime. The second serious problem is the scope of the state's obligations in terms of caring for the health of such a person, their social needs and possible gender reassignment. International standards and national regulations are very diverse in this matter, but above all they are of the so-called soft law, i.e., guidelines and recommendations. The test for our civilization will be how quickly this soft law will become a law “graven in stone”. The starting point for writing this article were the negative experiences of Weronika W., a transgender woman serving a prison sentence in Poland, as well as a discussion about the location of an activist who introduced herself as Margot, detained during a street demonstration in the Summer of 2020.

PL

Sytuacja osób transpłciowych w więzieniu jest bardzo trudna, głównie ze względu na ich poczucie bezpieczeństwa, lecz także z powodu specyficznych potrzeb w zakresie opieki medycznej i wsparcia socjalnego. Współczesna kultura jest coraz bardziej „wyczulona” na położenie szczególnych grup społecznych, takich jak seniorzy, osoby LGBT czy osoby doświadczające niezgodności płci. Jeśli chodzi o tę ostatnią kategorię, to dopiero od 1 stycznia 2022 r. w nowej klasyfikacji chorób WHO zjawisko transpłciowości przestało być traktowane jak zaburzenie zdrowotne. Artykuł jest próbą dokonania przeglądu międzynarodowych standardów prawnych dotyczących postępowania wobec tych osób oraz przepisów regulujących ich funkcjonowanie w warunkach pozbawienia wolności. Moim celem jest prześledzenie ewolucji tych standardów oraz zademonstrowanie dobrych i złych praktyk w różnych krajach. Jedną z naczelnych zasad funkcjonowania nowoczesnego systemu penitencjarnego jest rozdział osób różnej płci, motywowany potrzebą ochrony kobiet. Z tego punktu widzenia wykonanie kary wobec osoby transpłciowej stanowi dla instytucji izolującej trudne wyzwanie, głównie logistyczne, sprowadzające się do dylematu, w jakiej placówce ulokować taką osobę, czy też jak dobrać najlepszy reżym odbywania kary. Drugi poważny problem to zakres obowiązków państwa w kwestii troski o zdrowie takiej osoby, jej potrzeby socjalne oraz ewentualną korektę płci. Standardy międzynarodowe i regulacje krajowe są w tej materii bardzo różnorodne, ale przede wszystkim mają charakter tzw. soft law, czyli rekomendacji i zaleceń. Testem dla naszej cywilizacji będzie to, jak szybko to miękkie prawo stanie się prawem „wykutym w kamieniu”. Asumptem do napisania tego artykułu były negatywne doświadczenia Weroniki W., transpłciowej kobiety odbywającej karę pozbawienia wolności w Polsce, lecz także dyskusja wokół miejsca umieszczenia aktywistki przedstawiającej się jako Margot, zatrzymanej w trakcie demonstracji ulicznej latem 2020 r.