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• Access speed: 10% with 9,6 Kbit/s or less; 16% with 14.4/19.6 Kbit/s; 30% with at least<br />

28.8 Kbit/s; 18% with 64 Kbit/s; rema<strong>in</strong><strong>in</strong>g2 Mbit/s<br />

• ISDN connections were ma<strong>in</strong>ly used from Germany and hardly <strong>in</strong> the US<br />

• Over two third accessed the Web from home<br />

• 50% of our users were physicians, additional 20% had a job related to medic<strong>in</strong>e<br />

• The database was ma<strong>in</strong>ly accessed for the purpose it was designed for (multiple selections<br />

possible): 50% cont<strong>in</strong>u<strong>in</strong>g medical education, 30% reference, 25% teach<strong>in</strong>g, 28% patients<br />

• Hyperl<strong>in</strong>ked access (alphabet 80%, ICD: 18%) was much more used than full text retrieval<br />

(22%) or the database <strong>in</strong>terface (15%)<br />

• The overall rat<strong>in</strong>g of the atlas and the image quality was very good<br />

6 Summary<br />

You should now be able to answer the follow<strong>in</strong>g questions<br />

• How should I acquire digital images for my application?<br />

• What compression technique will be appropriate for my application?<br />

• What image file <strong>format</strong> will be appropriate for my application?<br />

• Is color/gamma correction necessary? What could be done for this?<br />

• What k<strong>in</strong>d of database system should be used?<br />

• How can image <strong>in</strong><strong>format</strong>ion be described for retrieval?<br />

• Do I need a database? Wouldn’t a text based system be the better choice?<br />

• Should tools for a Web based database be used?<br />

and to set up your image database <strong>in</strong> the Web.<br />

Good Luck!<br />

7 Acknowledgments<br />

I want to thank all those who helped me <strong>in</strong> the DOIA project (<strong>in</strong> alphabetically order):<br />

• Bergmann, Mart<strong>in</strong>, MSc<br />

• Burzler, Frank, MSc<br />

• Diepgen, Thomas L., MD, PhD<br />

• Fartasch, Manige, MD, PhD<br />

• Hiller, Dorothea, MD<br />

• Holleczek, Peter, PhD<br />

• Killig, Sven<br />

• Krejci-Papa, Niels, MD<br />

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