Using the NEMO Experiment Browser

Once a NEMO experiment has run, the investigator will need to access the generated experiment data. This includes behavioral data and functional image data. The NEMO Experiment Browser provides an interface to this data.

Starting Up

On start up, the main window and login window appear. The user will be required to enter a valid username and password to authenticate.

start up window

Once the user has successfully authenticated with the NEMO system, the user can retrieve Behavioral Data and Functional Image Data

Behavioral Data

Click on the behavioral tab to begin retrieving behavioral data. Most of the buttons and fields are disabled at this point. An experiment must be selected in order to continue.

behavioral view

Select the experiment using the choice box at the top of the tab area

choose experiment

Select the retrieve type. All of the data for an experiment can be retrieved or if desired, a subset of instances can be retrieved based on a date range. When retrieving a subset of experiment instances, choose a start and end date to indicate the date range.

select retrieve type and date range of experiment instances

Once the retrieve type and the optional date range has been set, the destination directory can be chosen. Choose the destination directory for the resulting data files by pressing the browse button .

choose destination directory

Retrieve the data by pressing the retrieve button. The progress bar at the bottom indicates how many of the experiment instances have been processed. During the retrieval process most fields are temporarily disabled. The figure below shows retrieval based on a date range, with 12 of 23 instances processed.

data retrieval

Image Data

At the end of each experiment run, subject MRI images are retrieved from the scanner and automatically stored in the NEMO system. These images can be accessed using the NEMO Experiment Browser. Prior to delivery of the image files, they are anonymized protect the identity for unintended recipients and compressed to speed download.

Click on the images tab to begin retrieving image data.

image browser

Select the experiment using the choice box at the top of the tab area. On selection, a list of subjects with available images for the selected experiment are revealed. The date of the experiment run, the initials and participation date of the subject, and the location are displayed in the resulting table.

choose experiment

A subject's images can be downloaded by right mouse-clicking on the subject and selecting the "get images option".

choose subject for image download

Once the image download process begins, a tab is opened at the bottom of the screen to provide status information about the image download process. The figure below indicates that anonymization process has completed and that the files are now being compressed before the download.

image processing

Once the image processing has completed, the images are returned as a zip file. The name of the compressed file corresponds to the session id for the experiment run. The id can be used to match the image data with the behavioral data files.

download compressed image file