* Use the following boutiques descriptor for `fsl_binarize`: https://github.com/big-data-lab-team/sim/blob/develop/sim/tests/fslbin_demo/fslmaths-bin.json * Create a SparkImage object https://github.com/big-data-lab-team/sim/blob/develop/sim/SparkImage.py * Add options `threshold` to SparkImage.option_ids * Write the invocation using `SparkImage.write_invocation` * Run the command using `SparkImage.bosh_exec`