Matches in SemOpenAlex for { <https://semopenalex.org/work/W4200423571> ?p ?o ?g. }
Showing items 1 to 54 of
54
with 100 items per page.
- W4200423571 abstract "Osteoporosis and associated fragility fractures are still a societal problem. Several quantitative ultrasound approaches have been proposed to overcome limitations of the current gold standard DXA. Bi Directional Axial Transmission (BDAT) is based on the measurement of waves guided by the cortical bone shell. Cortical thickness (Ct.Th) and porosity (Ct.Po) estimates correspond to the maxima of the objective function Proj(Ct.Th,Ct.Po), initially defined as the projection of a tested model in the singular vector basis (method 1). Each model matrix has the same dimension, i.e., Nf=124 x Nk=256, 512, 1024 or 2048 pixels, of an ultrasonic guided wave spectrum experimental image Norm(f,k). The total number of models is equal to Nth,=38 x Npo=25, i.e., the number of cortical thickness and porosity taken into account, ranging respectively from 0.8 to 4.5 mm and 1 to 25%. Finally, each pixel of the alternative objective function (NthxNpo pixels) corresponds to the pixel-wise image multiplication between one model and the experimental guided wave spectrum image (method 2) or a sparse matrix multiplication between experimental and model reshaped vectors (method 3). The three methods were tested on data obtained on 400 measurements. It was observed that methods 2 and 3 provided the same Ct.Th Ct.Po values while differences with method 1 decreased with Nk. Acceptable differences, i.e., lower than the typical measurement resolution (0.2 mm for Ct.Th and 1% for Ct.Po) were achieved for Nk=2048. Using Matlab on a standard desktop, this calculation took 20, 4 and 0.3 s, for the methods 1 to 3, respectively. Method 3 calculation was achieved in 5 ms using C++. This last value opens perspective toward guiding interface improvement using real time objective function." @default.
- W4200423571 created "2021-12-31" @default.
- W4200423571 creator A5012696256 @default.
- W4200423571 creator A5012697870 @default.
- W4200423571 creator A5037612337 @default.
- W4200423571 creator A5043771064 @default.
- W4200423571 creator A5059714759 @default.
- W4200423571 creator A5072338061 @default.
- W4200423571 creator A5079153752 @default.
- W4200423571 date "2021-10-04" @default.
- W4200423571 modified "2023-10-17" @default.
- W4200423571 title "Real Time Waveguide Parameter Estimation Using Sparse Multimode Disperse Radon Transform" @default.
- W4200423571 doi "https://doi.org/10.1109/laus53676.2021.9639171" @default.
- W4200423571 hasPublicationYear "2021" @default.
- W4200423571 type Work @default.
- W4200423571 citedByCount "0" @default.
- W4200423571 crossrefType "proceedings-article" @default.
- W4200423571 hasAuthorship W4200423571A5012696256 @default.
- W4200423571 hasAuthorship W4200423571A5012697870 @default.
- W4200423571 hasAuthorship W4200423571A5037612337 @default.
- W4200423571 hasAuthorship W4200423571A5043771064 @default.
- W4200423571 hasAuthorship W4200423571A5059714759 @default.
- W4200423571 hasAuthorship W4200423571A5072338061 @default.
- W4200423571 hasAuthorship W4200423571A5079153752 @default.
- W4200423571 hasConcept C11413529 @default.
- W4200423571 hasConcept C120665830 @default.
- W4200423571 hasConcept C121332964 @default.
- W4200423571 hasConcept C134306372 @default.
- W4200423571 hasConcept C160633673 @default.
- W4200423571 hasConcept C197231052 @default.
- W4200423571 hasConcept C33923547 @default.
- W4200423571 hasConceptScore W4200423571C11413529 @default.
- W4200423571 hasConceptScore W4200423571C120665830 @default.
- W4200423571 hasConceptScore W4200423571C121332964 @default.
- W4200423571 hasConceptScore W4200423571C134306372 @default.
- W4200423571 hasConceptScore W4200423571C160633673 @default.
- W4200423571 hasConceptScore W4200423571C197231052 @default.
- W4200423571 hasConceptScore W4200423571C33923547 @default.
- W4200423571 hasLocation W42004235711 @default.
- W4200423571 hasOpenAccess W4200423571 @default.
- W4200423571 hasPrimaryLocation W42004235711 @default.
- W4200423571 hasRelatedWork W10005870 @default.
- W4200423571 hasRelatedWork W10642017 @default.
- W4200423571 hasRelatedWork W10772485 @default.
- W4200423571 hasRelatedWork W1141829 @default.
- W4200423571 hasRelatedWork W11919378 @default.
- W4200423571 hasRelatedWork W3305442 @default.
- W4200423571 hasRelatedWork W5554451 @default.
- W4200423571 hasRelatedWork W7150022 @default.
- W4200423571 hasRelatedWork W9691298 @default.
- W4200423571 hasRelatedWork W1837639 @default.
- W4200423571 isParatext "false" @default.
- W4200423571 isRetracted "false" @default.
- W4200423571 workType "article" @default.