Table 1.

Distribution of DicomWorks Registered Users Between January, 2003, and May, 2006, Depending on their Occupation, Interest in the Software, Geographic Region, and Country Development Index

	Teleradiology Users	All Users
Number of registered users	n = 442	n = 35,839
By occupation
Radiologists		50%
Engineers (PACS administrators, PACS engineers, IT technicians)		20%
Medical physicists		9%
Cardiologists		7%
Neurology (neurologists, neurosurgeons)		6%
Others		8%
By interest
Viewing images		8,996 (25%)
Export to presentation software		1,478 (4%)
DICOM tags edition/anonymization		943 (3%)
Export to AVI (cine-loop)		756 (2%)
Teleradiology		442 (1%)
Others (testing, not specified)		23,223 (65%)
By geographic region
European Union	29% (n = 126)	42% (including Germany 8.6%; France 5.7%; UK 5.2%)
North America	42% (n = 184)	36% (including USA 33.%; Canada 2.7%)
South America	10% (n = 45)	6.8% (including Brazil 2.4%; Mexico 1.3%)
Asia	4% (n = 17)	5.1% (including Japan 2.1%; China 1.4%)
India	5% (n = 24)	3.1% (including India 2.9%)
Australia	6% (n = 27)	2.6% (including Australia 2.2%)
Middle East	1% (n = 3)	2.3% (including Turkey 0.8%; Israël 0.5%)
Africa	2% (n = 7)	1.5% (including South Africa 0.5%; Egypt 0.4%)
Russia	<1% (n = 1)	0.7% (including Russian Federation 0.7%; Ukraine 0.2%)
By development indexa
Top 30 countries (HDI range from 0.963 down to 0.878)	71% (n = 316)	78.3% (including United States 33%; Germany 8.6%; France 5.7%)
High development (n = 57) HDI>=0.8	84% (n = 371)	85.7% (n = 30,727) (including United States 33%; Germany 8.6%; France 5.7%)
Moderate development (n = 88) 0.5<HDI<=0.799	16% (n = 71)	13.3% (n = 4,766) (India 2.9%; Brazil 2.4%; China 1.4%)
Low development (n = 32) (HDI < 0.5)	0%	0.1% (n = 39) (Senegal n = 6; Nigeria n = 4; Tanzania n = 4)

HDI = Human Development Index

^aBased on the 2005 UN Human Development Index¹⁰