NDLI: 3D coordinate computation by RSA under non-standard conditions

Content Provider	IEEE Xplore Digital Library
Author	Soavi, R. Motta, M. Visani, A. Bragonzoni, L. Loreti, I.
Copyright Year	2000
Description	Author affiliation: Biomech Lab., Rizzoli Orthopedic Inst., Bologna, Italy (Soavi, R.)
Abstract	The operative requirements of Roentgen Stereophotogrammetric Analysis (RSA) change according to the type of investigation being performed, and sometimes practical conditions do not permit to respect standard specifications. The aim of this work is to verify the reliability of the system under nonstandard conditions for both the hip and knee calibration cages. Different focus-to-film distances, angles of convergence between the two X-ray tubes, and slopes of the radiographic cassettes were investigated. A test object containing five markers, was X-rayed in the cage reference system under the different experimental conditions, and the images obtained were measured following the RSA criteria. Two way analysis of variance was applied to each marker coordinate to evaluate the fluctuation caused by repeated measurements of the same couple of images, and different experimental conditions. The statistical analysis showed that no parameter represented a significant source of variation. In particular, the negligible variation of the 3D coordinates due to focus-to-film distance change. demonstrated that the system can correctly compute the marker position inside the calibrated space under all conditions of magnifications. The fluctuation of marker coordinates due to the different parameters, was equal or less than 10/sup -4/ mm, strictly within the limits required by clinical investigations. These results permit a reliable use of the RSA technique In new applications, in which particular tools could be required to simulate mechanical stress occurring during daily life. Thus, this study contributes to improving the flexibility of RSA in clinical studies, making the technical requirements of the radiographic set-up less constraining.
Starting Page	570
Ending Page	572
File Size	280174
Page Count	3
File Format	PDF
ISBN	0780364651
ISSN	1094687X
DOI	10.1109/IEMBS.2000.900805
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-23
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Focusing X-ray imaging Radiography Fluctuations Performance analysis Hip Knee Calibration Convergence System testing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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