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1.
Chinese Journal of Medical Instrumentation ; (6): 6-10, 2021.
Article in Chinese | WPRIM | ID: wpr-880413

ABSTRACT

Osteoporosis is one of the common metabolic diseases, which can easily lead to osteoporotic fractures. Accurate prediction of bone biomechanical properties is of great significance for the early prevention and diagnosis of osteoporosis. Bone mineral density measurement is currently used clinically as the gold standard for assessing bone strength and diagnosing osteoporosis, but studies have shown that bone mineral density can only explain 60% to 70% of bone strength changes, and trabecular bone microstructure is an important factor affecting bone strength. In order to establish the connection between trabecular bone microstructure and bone strength, this paper proposes a prediction method of trabecular bone modulus based on SE-DenseVoxNet. This method takes three-dimensional binary images of trabecular bone as input and predicts its elastic modulus in the z-axis direction. Experiments show that the error and bias between the predicted value of the method and the true value of the sample are small and have good consistency.


Subject(s)
Humans , Biomechanical Phenomena , Bone Density , Cancellous Bone/diagnostic imaging , Elastic Modulus , Osteoporosis/diagnostic imaging
2.
Article in Spanish | LILACS | ID: lil-641812

ABSTRACT

En el marco de una investigación más amplia, que indaga las diversas concepciones del tiempo, y las relaciones que se establecen entre el pasado y el presente en la explicación del desarrollo psíquico individual y colectivo, se analizará aquí específicamente: 1) el concepto de memoria filogenética usado en la psicología argentina de principios del siglo XX; 2) el papel que esta memoria no consciente cumplió en la explicación del desarrollo psicológico; y 3) su articulación con las nociones de evolución e historia en la interpretación psicosocial. Se sostiene aquí que la transformación de la memoria en objeto biológico en el marco de la teoría de la evolución, permitió una redefinición de la misma desde el punto de vista psicológico, que incluyó un modo particular de entender el carácter de representación inconsciente en la explicación del desarrollo psicológico en general, por parte de los autores de la época.


This paper analyses specifically 1) the use of the concept of philogenetic memory in the argentine psychology at the beginnings of twentieth century; 2) the role of this notion in the explications of psychological development; and 3) its relationships with the notions of evolution and history in the psychosocial interpretation. It is argued here that the transformation of the memory in a biological object from an evolution theory frame, allowed a redefinition of this notion from a psychological perspective. This change included a particular way of understanding the no conscious representation in the explication of the general psychological development, by the authors of this time.

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