Dual-energy digital radiography for the assessment of bone mineral density

Tahvanainen, Päivi S.; Lammentausta, Eveliina; Pulkkinen, Pasi; Tervonen, Osmo; Jämsä, Timo; Nieminen, Miika T.
May 2010
Acta Radiologica;May2010, Vol. 51 Issue 5, p543
Academic Journal
Background: Bone mineral density (BMD) is usually determined by dual-energy X-ray absorptiometry (DXA). Digital radiography (DR) has enabled the application of dual-energy techniques for separating bone and soft tissue, but it is not clear yet whether BMD information can reliably be obtained using DR. Purpose: To determine the ability of dual-energy digital radiography (DEDR) to predict BMD as determined by DXA. Material and Methods: Reindeer femora ( n=15) were imaged in a water bath at a typical clinical imaging voltage of 79 kVp and additionally at 100 kVp on a DR system. BMD was determined in four segmented regions (femoral neck, trochanter, inter-trochanter, Ward's triangle) from these images using the DXA calculation principle. BMD results as determined by DEDR were compared with BMD values as determined by DXA. Results: Significant moderate to high linear correlations (0.66–0.76) were observed at the femoral neck, Ward's triangle, and trochanter between BMD values as determined by the two techniques. The coefficient of variation (CVRMS) ranged between 2.2 and 4.7% and 0.2 and 1.8% for DEDR and DXA analyses, respectively. Conclusion: DXA-based BMD information can be obtained with moderate precision and accuracy using DEDR. In future, combining BMD measurements using DEDR with structural and geometrical information available on digital radiographs could enable a more comprehensive assessment of bone.


Related Articles

  • Medical Grade vs Off-the-Shelf Color Displays: Influence on Observer Performance and Visual Search. Krupinski, Elizabeth A. // Journal of Digital Imaging;Aug2009, Vol. 22 Issue 4, p363 

    The goal of this study was to compare diagnostic accuracy of radiologists viewing clinical images on a top-of-the-line medical-grade vs a top-of-the-line commercial off-the-shelf (COTS) color display with the luminance values set to simulate a display that had been in use for 1 year. A set of 50...

  • Weighing the Costs Between Standard Film or Computed Radiography. Fischer, Fred // American Chiropractor;Nov2005, Vol. 27 Issue 12, p10 

    Presents information regarding the advantages of digital and computed radiography imaging systems (CR)over standard x-ray films used in diagnostic laboratories. Elimination of disposables such as films and chemicals; Enhancement of the image to bring out diagnostic detail; Quick access of the image.

  • Study on Construction of a Medical X-Ray Direct Digital Radiography System and Hybrid Preprocessing Methods. Yong Ren; Sheng Wu; Mijian Wang; Zhongjie Cen // Computational & Mathematical Methods in Medicine;Jan2014, p1 

    We construct a medical X-ray direct digital radiography (DDR) system based on a CCD (charge-coupled devices) camera. For the original images captured from X-ray exposure, computer first executes image flat-field correction and image gamma correction, and then carries out image contrast...

  • Comparação das Imagens Radiográficas Digitais e Convencionais em Reabsorções Ósseas Periodontais. de Almeida Braga, Eduardo Fialho; Silva, Pedro Gregol; de Oliveira, Paula Tereza Vardasca; Ferrão Júnior, José Peixoto; Marques, Joel // Pesquisa Brasileira em Odontopediatria e Clinica Integrada;out-dez2011, Vol. 11 Issue 4, p585 

    Objective: To assess periodontal bone defects, comparing the digital images (using the tools of Digora® fmx 2.5) with the conventional angle of -10, 0 and 10 degrees, through the three evaluators analysis. Methods: To obtain the images we used a conventional X -ray machine with standardized...

  • Diagnosis of osteoporosis: visual assessment on conventional versus digital radiographs. Wagner, Sabine; Stäbler, Axel; Sittek, Harald; Bonel, Harald; Laeverenz, Gerlinde; Reiser, Maximilian; Baur-Melnyk, Andrea // Osteoporosis International;Dec2005, Vol. 16 Issue 12, p1815 

    In many radiological departments conventional radiography has been replaced by digital radiography. Therefore, the purpose of this study was to analyze the visual detection of osteopenia/osteoporosis with both digital and conventional radiographs. In 286 patients we retrospectively evaluated...

  • Digital Subtraction Radiography: Then (1983) and Now (1998). Hausmann, Ernest // Journal of Dental Research;Jan1999, Vol. 78 Issue 1, p7 

    The article focuses on the use of digital subtraction radiography in studying changes in the alveolar bone. It states that lipopolysaccharides (LPS) purified from Porphyromonas gingivalis would stimulate the resorption of osteoclasts in culture systems and speculates on the relationship between...

  • Evaluation of Pipe Wall Thickness Based on Contrast Measurement using Computed Radiography (CR). Rakvin, Marko; Markučič, Damir; Hižman, Boris // Annals of DAAAM & Proceedings;2013, Vol. 24 Issue 1, p1216 

    Specific properties of imaging plates, like wide dynamic range and greater sensitivity to radiation dose compared to radiographic film, as well as possibility of computer assisted analysis of digital radiographic image make computed radiography (CR) excellent non destructive method for pipe...

  • Revealing the world within. Thomas, Adrian M.K.; Pickstone, John // BMJ: British Medical Journal (International Edition);Jan2007 Supplement, Vol. 334, ps12 

    This article focuses on medical imaging, including the discovery of x-rays by Wilhelm Conrad Röntgen. Medical advances due to x-rays and the dangers of radiation are mentioned. The introduction of modern digital radiology with computed tomgraphy has transformed investigative medicine....

  • Dry imaging cameras. Indrajit, IK; Alam, Aftab; Sahni, Hirdesh; Bhatia, Mukul; Sahu, Samaresh // Indian Journal of Radiology & Imaging;May2011, Vol. 21 Issue 2, p82 

    Dry imaging cameras are important hard copy devices in radiology. Using dry imaging camera, multiformat images of digital modalities in radiology are created from a sealed unit of unexposed films. The functioning of a modern dry camera, involves a blend of concurrent processes, in areas of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics