1. Short overview
The application aims at analyzing fMRI data to compute brain activation maps . Such an analysis is well-known for healthy subjects but performing it on pathological brains (e.g for neurosurgery planning) is challenging because the optimal software parameters are still unknown. The Grid has already been used to address this parameter search problem (1). Yet, it is still hardly possible for end-users to be autonomous with it. We demonstrate here our current solutions to enhance usability.
Our deployment is based on the VBrowser for data management and on MOTEUR for workflow management.
The VBrowser (2) is an interactive tool that enables browsing local and remote resources from a single application. User-level file access control is yielded by the use of the Storage Resource Broker (3) through the VBrowser. A plug-in allows to easily manage parameter sweep experiments for fMRI data.
The workflow description relies on the Scufl language used in Taverna (4). The interface between Taverna and EGEE is done using the MOTEUR engine (5). In addition to a command-line wrapper that handles basic application-level errors, it allows to exploit service parallelism, which is particularly important on variable platforms such as EGEE.
An interface between MOTEUR and the VBrowser has been implemented to enable:
- Executing workflows processing files managed by the VBrowser
- Easily accessing results through the VBrowser
4. Conclusions / Future plans
This software architecture is a step towards an autonomous usage of the EGEE infrastructure by medical image analysts. In our future work, we plan to study the integration of solutions such as the Medical Data Manager or the Globus MEDICUS in this architecture to enable the use of EGEE Storage Elements in a secure way.
Provide a set of generic keywords that define your contribution (e.g. Data Management, Workflows, High Energy Physics)
Medical image analysis, data management, parameter sweep, workflow.
URL for further information:
If demonstration is requested please explain what visual or interactive aspects of the contribution necessitate a demonstration rather than a presentation or poster?
The contribution of this work is to enhance the usability of the EGEE grid for non Grid-experts. A lot of effort has thus been put in the development of graphical user interfaces, which can truly be apprehended only by a demonstration.