Kempenhaeghe is an expertise center on epilepsy, sleeping disorders and neurocognition.Researchers have collected data on medicine use from a large number of epilepsy patients. There is a need to obtain insight into medication patterns. Interactive visualization is a promising direction to this end. The data have to be presented such that experts are enabled to derive hypotheses and evaluate these.

The following data are available:

• type and dose of medication, from start of treatment until now;
• measured concentrations;
• characteristics of patients;
• medical specialist.

The challenge is to deal with this combination of a large amount of temporal data and attributes of stakeholders, such that useful insights can be obtained.

Based on interviews with experts of Kempenhaeghe the problem is analysed and requirements are defined. Next is studied which existing analysis and visualization methods are suitable, and where new methods are required. These are implemented in a prototype and evaluated by experts.

• Kempenhaeghe, Heeze