Method and device for lung functional contours delineation on functional images

A device (1) for delineating lungs functional volumes on a functional image, the device comprising:

• an anatomical segmentation module (5) adapted to:
• align an anatomical image and a functional image such that both images have corresponding coordinates;
• determine a lung anatomical contour on the anatomical image;
• transfer the lung anatomical contour on the functional image;
• and
• a functional segmentation module (4) adapted to;
• obtain the total radioactivity inside the anatomical contour A0;
• determine a functional contour on the functional image with a threshold k such that all pixels inside said functional contour have a pixel value higher than the threshold;
• obtain the total radioactivity inside the functional contour Ak;
• obtain a functional value corresponding to the ratio between the total radioactivity inside the functional contour and the total radioactivity inside the anatomical contour;
• and
• storing the function contour if its functional value has a functional value (FV) expected.