Statistical shape analysisStatistical shape analysis is an analysis of the geometrical properties of some given set of shapes by statistical methods. For instance, it could be used to quantify differences between male and female gorilla skull shapes, normal and pathological bone shapes, leaf outlines with and without herbivory by insects, etc. Important aspects of shape analysis are to obtain a measure of distance between shapes, to estimate mean shapes from (possibly random) samples, to estimate shape variability within samples, to perform clustering and to test for differences between shapes.
Standard additionThe Standard addition method, often used in analytical chemistry, quantifies the analyte present in an unknown. This method is useful for analyzing complex samples where a matrix effect interferes with the analyte signal. In comparison to the calibration curve method, the standard addition method has the advantage of the matrices of the unknown and standards being nearly identical. This minimizes the potential bias arising from the matrix effect when determining the concentration.
Échographie abdominaleL'échographie abdominale est une forme d'échographie médicale (application médicale de la technologie des ultrasons) permettant de visualiser les structures anatomiques abdominales. Il utilise la transmission et la réflexion des ondes ultrasonores pour visualiser les organes internes à travers la paroi abdominale (à l'aide de gel, qui aide à la transmission des ondes sonores). Pour cette raison, la procédure est également appelée échographie transabdominale, contrairement à l'échographie endoscopique, cette dernière combinant l'échographie et l'endoscopie en visualisant les structures internes à l'intérieur des organes creux.
