Veterinary Medicine - April 2009 - (Page 181)

SUMMARY This article provides an overview of the technologies used for primary capture of radiographic information. Before the information is useful it must undergo image processing. Each vendor has a different system for image processing that may involve several steps that vary in complexity. Image processing contributes in large part to the differences in image appearance when evaluating the nished product. Although there are marked technical differences among the radiographic systems from the different vendors, much of the difference in image quality will depend on the vendors’ ability to effectively process the image and not necessarily on the type of equipment used to obtain the image. CR is a relatively inexpensive system of digital radiography that shares a similar work ow with lm-based radiography. DR technologies enable veterinarians to generate radiographic images within seconds of acquisition. Editors’ note: This article updates “Exploring your digital radiography options,” which appeared in a supplement to Veterinary Medicine’s December 2006 issue. 1. Bruce R. CR versus DR—what are the options? AuntMinnie, 2003. Available at: www. auntminnie.com/index.asp?sec=ser&sub=def&pag=dis&ItemID=58851. 2. Bushberg JT, Seibert JA, Leidholdt Jr, EM, et al. The essential physics of medical imaging. 2nd ed. Philadelphia, Pa: Lippincott, Williams & Wilkins, 2002. 3. Puchalski S, Hornof W. A limited image quality comparison of lm-screen, computed radiography and digital radiography, in Proceedings. Am Coll Vet Radiogr Annu Mtg 2004. 4. Andriole KP. Productivity and cost assessment of computed radiography, digital radiography, and screen- lm for outpatient chest examinations. J Digit Imaging 2002;15:161-169. 5. Andriole KP, Luth DM, Gould RG. Work ow assessment of digital versus computed radiography and screen- lm in the outpatient environment. J Digit Imaging 2002;15(suppl 1): 124-126. 6. Digital x-ray systems. Part 1. An introduction to DX technologies and an evaluation of cassette DX systems. Health Devices 2001;30;273-310. 7. Digital x-ray systems. Part 2. An overview of digital radiography concepts and an evaluation of cassetteless DX systems. Health Devices 2001;30:381-401. 8. Fischbach F, Ricke J, Freund T, et al. Flat panel digital radiography compared with storage phosphor computed radiography: assessment of dose versus image quality in phantom studies. Invest Radiol 2002;37:609-614. 9. Goo JM, Im JG, Kim JH, et al. Digital chest radiography with a selenium-based at-panel detector versus a storage phosphor system: comparison of soft-copy images. AJR Am J Roentgenol 2000;175:1013-1018. 10. Hornof W. Digital radiography: the available technologies and how to separate hype from reality, in Proceedings. Am Vet Med Assoc Annu Convention 2005. 11. Peer S, Neitzel U, Giacomuzzi SM, et al. Direct digital radiography versus storage phosphor radiography in the detection of wrist fractures. Clin Radiol 2002;57:258-262. 12. Kroft LJ, Geleijns J, Mertens BJ, et al. Digital slot-scan charge-coupled device radiography versus AMBER and Bucky screen- lm radiography for detection of simulated nodules and interstitial disease in a chest phantom. Radiology 2004;231:156-163. 13. Kroft LJ, Veldkamp WJ, Mertens BJ, et al. Comparison of eight different digital chest radiography systems: variation in detection of simulated chest disease. AJR Am J Roentgenol 2005;185:339-346. 14. Veldkamp WJ, Kroft LJ, Boot MV, et al. Contrast-detail evaluation and dose assessment of eight digital chest radiography systems in clinical practice. Eur Radiol 2006;16:333-341. 15. Veldkamp WJ, Kroft LJ, Mertens BJ, et al. Digital slot-scan charge-coupled device radiography versus AMBER and Bucky screen- lm radiography: comparison of image quality in a phantom study. Radiology 2005;235:857-866. REFERENCES Answers to your questions about digital radiography To read an online guide to digital radiography by Matt Wright, DVM, DACVR, and his colleagues, search for “digital radiography” on any page of dvm360.com. VETERINARY MEDICINE April 2009 181 http://www.auntminnie.com/index.asp?sec=ser&sub=def&pag=dis&ItemID=58851 http://www.auntminnie.com/index.asp?sec=ser&sub=def&pag=dis&ItemID=58851 http://www.medrx-usa.com http://www.dvm360.com

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Veterinary Medicine - April 2009 Contents Idea Exchange Practical Matters An Update on Gallbladder Mucoceles in Dogs Digital Radiography Equipment Benefits and Considerations How to Perform a Two-portal Laparoscopic Ovariectomy Author Guidelines CE Form/Advertiser Index Marketplace/Classifieds Mind Over Miller

Veterinary Medicine - April 2009

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