Hello All Dear:

I am making the Knee MRI based model, with the ITK-Snap, but I have 2 problems:

1- I was making Segmentation with Image Intensity module, and then I Updated the maesh after adding 

bubble in Automated Segmenttation, but when I wanted to save the model, finaly, I used the ,File/ Save/ 

Segmentation Mesh , then the window was appeared and asked the file name, and the File type that I want 

to be exported, and I sellected  the STL File type, but after saving, I checked the expoted file with the as 

Solidworks 2008, It Doesn't read this file , and send error, and It conclouded that this file was not expoted 

as STL File, then Can You Direct Me, Please.

2- As You know in knee MRI, we have the Cortex region around the Femur and Tibia, Then when I want to 

use Intensity Region Module , and I use the Intensity Region Filter, To Achieve the boders of the Cortex of 

the Femur , I see From Exterior border of the Femur Cortex to Interior Portion, There is this Intensity 

Distribution, From 120 t0 70 , then from 70 to 300 (From Middle of the Cortex to Interior Border of the

Bone) , and from 300 to 800 until the center region of the femur, Then I don't know how to segment the 

Femur, with this Intensity filter, because if I put the More than 120 & below the 800 , the software fill the 

whole body of the image, femur, cartilage and ..., then can you direct me the Correct Method, May be I 

shoud use the Edge Detection, Please.

Best Regards.

Amir Hossein Saveh.