Redesigning the DTITool
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description
The final presentation for the Design Case project of the User System Interaction program generation 2010.The DTITool is a tool for visualizing medical data. The quality of the visual
Transcript of Redesigning the DTITool
Redesigning the DTITool
Nikolay ChupriyanovGlenn VeugenTin de ZeeuwBiyong Zhang
USI 2011
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
What is Diffusion Tensor Imaging?
What is Diffusion Tensor Imaging?
DTI is a magnetic resonance imaging (MRI) method
What is Diffusion Tensor Imaging?
Measures tissue such as white matter or muscle fibers
DTI is a magnetic resonance imaging (MRI) method
The DTITool
Visualization tool for DTI data
Explore DTI data
Quantify DTI data
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
Initial research
Getting acquainted with Diffusion Tensor Imaging– Interviews with doctors and researchers
Seeing how DTITool is used– Observation of experts using DTITool– Heuristic evaluation
List with issues and feature requests– From 2 researchers and MMC Veldhoven
Early sketches and ideas
Initial conclusions
There are many potential users
DTITool is great for visualizing data
Initial conclusions
The UI is unintuitive and cumbersome to the user
DTITool is not being applied in the medical field
Use case for testing
Visualizing tracked fibers
Explore MRI data
Draw Regions of Interest
Explore MRI data
Track and visualize fibers
Explore MRI data
Draw regions of Interest
Track and visualize fibers
Draw regions of Interest
Explore MRI data
Export visualizations
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
1st user tests
9 expert users participated
Scenario based on initial research
4 Medical imaging background
2 With DTITool experience
3 HCI background
Old video
Results
User # T1 T2.1 T2.2 T2.3 T2.4 T3 T4 T5 T6
1 fail pass pass fail pass fail fail fail pass
2 No record pass fail fail fail pass pass pass fail
3 pass pass pass fail pass pass pass pass fail
4 pass pass pass fail pass fail fail fail fail
5 pass pass pass pass pass fail fail fail fail
6 pass pass pass pass pass fail pass pass pass
7 pass pass pass pass pass pass fail fail pass
8 pass pass pass pass pass pass pass pass pass
9 pass pass pass pass pass pass pass pass pass
88% 100% 88% 55% 88% 55% 55% 55% 55%
Lack of feedback in viewports
No clear cues
Not always clear how to zoom
Right panel is cluttered
ROI drawing not straight-forward
Poor representation of available plugins
“Dropdown sucks”
Unclear where to draw ROI
Interface text is not intuitive
“If I only save fibers, I lose the background information of the planes”
Doesn’t really know what to save
“Tool seemed to be clean and simple, but it’s this kind of simplicity that hides the complexity”
• Composed scenario based on initial research• Processed results by means of affinity diagram
Game storming
Improve the basic package
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
2nd user tests
Prototyping time!
Validating prototypes heuristically
Testing round with users7 users
New and “recycled” users
Results of prototype testing
User T1 T2 T3.1 T3.2 T3.3 T3.4 T3.5 T4 T5 T6 T7 T8 T9
#1 pass pass pass fail pass No record No record fail pass pass pass pass pass
#2 pass pass pass pass pass pass fail fail pass pass pass pass pass
#3 pass pass pass pass pass pass fail fail pass pass pass pass pass
#4 pass pass pass pass pass pass fail fail pass pass pass pass pass
#5 pass pass pass pass pass pass No record fail fail fail pass pass fail
#6 pass pass pass pass pass No record No record pass pass pass pass pass pass
#7 pass pass pass pass pass pass pass pass pass pass pass pass pass
100% 100% 100% 85% 100% 100% 25% 28% 85% 85% 100% 100% 85%
Comparison between tests
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
Tooltips & help
How it wasPlug-in list navigation
How it was
How it was
The new right panel
• Hick’s law in play
• Supports the standard workflow
Viewport manipulation and control
How we redesigned it and why
ROI drawing and editing
How it was
• Also: ask for video by Tin
How we redesigned it and why
Fiber tracking and visualisation
Project management
Exporting images
How it was
How we redesigned it and why
Final result
High-fidelity interactive prototype
Sketches and ideas that have not been implemented in hi-fi
prototype
An accompanying specification document explaining the design
changes and rationale
1st user tests
2nd user tests
Final designs
Retrospective
DTI and DTITool
Initial research
What have we learned
Go to users early and often
Sketch a lotThe more you sketch and throw away –
the better
Thank you for your attention
