While each patient history is unique, there are also commonalities among cases. Of particular interest to doctors is how different patients react to a specific treatment. They group similar cases into cohorts they use to draw conclusions for future treatment. The Fraunhofer Institute for Computer Graphics Research IGD in Darmstadt has developed software that allows doctors to quickly find the similarities in digitized patient files and display them in a user-friendly format. The clever thing about the program is that it uses a smart algorithm to adapt to the user’s particular interest. “The algorithm processes complex data sets and visualizes that which is of interest to the user. We call this visual analytics,” explains Prof. Jörn Kohlhammer, head of the Information Visualization and Visual Analytics department at Fraunhofer IGD. Doctors benefit because they can quickly group patients into cohorts and speed up the process of gaining fresh insight from the large quantities of patient data. Prostate cancer is a good example: to analyze a treatment’s effectiveness, it is important to know in which cases the cancer progressed in a similar way and the medicines used to treat the patients.
Explaining through visualization
Visualization can help people understand large quantities of data, as software transforms meaningless columns of numbers into conclusive graphics. Instead of struggling through each individual patient file, the user sees pictures on a screen. On top of that, doctors need just a few clicks to go from the data overview into an individual patient’s digital file, where they can quickly compare blood values, age or treatment plans.
Visualizing diabetes, ENT ailments and allergies
“Our research strives to divide work between humans and machines in a way that suits their strengths: the machine to rapidly process and display data, the human to draw the correct conclusions from the data,” says Prof. Kohlhammer. “Cohorts play an important role in treating other illnesses as well, and we are confident that we will soon be able to apply our method to diabetes, allergies, and ear, nose and throat ailments.”
Visual analytics at Fraunhofer IGD
This field of information technology brings together the visualization and searching of large quantities of data with the goal of quickly finding specific information. The challenge is that once data reaches a certain volume, it can no longer be visualized in a way that allows for proper processing. At the same time, because of how traditional search algorithms are programmed, it is not easy for users to work with them.
Fraunhofer IGD’s department of Information Visualization and Visual Analytics has substantial expertise in both domains and uses its knowledge to program smart search algorithms.