Hello,

Let me first introduce myself. I'm Léon Driessen and I'm working as a technician at the Orthopaedic Research Laboratory at the RadboudUMC in Nijmegen, The Netherlands.

Since about two years, part of my job has become segmenting CT an MRI scans for research purposes. Our researchers use these segmentations for their computer modelling.

All our segmentation are done with Mimics.

Recently I was introduced to itk-SNAP. One of our students had to work on a segmentation and because she wasn't always at the lab and also because Mimics only runs with a license, they gave here itk-SNAP to work with, so she could use it at home. I wasn' familiar with that program by then and it made me curious, so I started to look and see if there where more applications like this to be found on the internet and finally I stumbled on Seg3D, which I like very much.

Unfortunately, Seg3D lacks my favorite segmentation tool, which is the lasso tool in combination with the threshold settings. When I do my segmentions I always make use of a drawing tablet, because it works much smoother then a mouse and is less strainfull for your arm.

As you propably may know the paint brush in Mimics can be used in combination with a threshold setting (just like Seg3D can), but the brush can also be changed to a lasso. This lasso has become very usefull to me when  I'm segmentating a MRI from, for instance a knee (tissue's  like tendons, menisci, cartilage, but also cortical and trabecular bone). I simply encircle the parts I'm interested in and every pixels with a grayscale that's within my threshold setting is selected.

The lasso can also be used to select everything that is  within the selection, which makes it very simple to fill holes in a mask. 

Do you think there is a possibility that this option can be added to the Seg3D paint brush? I, and I think many others, would appreciate it very much.

Keep up the good work!

Yours sincerely,

Léon Driessen 

Het Radboudumc staat geregistreerd bij de Kamer van Koophandel in het handelsregister onder nummer 41055629.
The Radboud university medical center is listed in the Commercial Register of the Chamber of Commerce under file number 41055629.

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