Method and system for displaying tomosynthesis images

1. A method for displaying a volume obtained by tomosynthesis, the method comprising:

displaying a two-dimensional image of a slice or slab;

receiving user input that defines, on the displayed two-dimensional image, a two-dimensional region of interest located in a plane of the image; and

displaying, in the displayed two-dimensional image within the region of interest at least one of:

images of the slices of a volume of interest associated with the two-dimensional region of interest;

three-dimensional images of the volume of interest associated with the two-dimensional region of interest; and

slabs obtained from the volume of interest associated with the two-dimensional region of interest.

2. The method of claim 1 , wherein defining the region of interest further comprises:

defining, on the displayed two-dimensional image, a position and size of a two-dimensional region of interest,

wherein a position of the volume of interest is defined by the position of the region of interest, and

wherein a depth of the volume of interest is adjusted automatically or manually.

3. The method of claim 2 , wherein, when the displayed image is a slab, the depth of the volume of interest is equal to the thickness of the slab, and a central slice of the volume of interest corresponds to a central plane of the slab.

4. The method of claim 2 , wherein defining the depth of the volume of interest further comprises:

adjusting said depth to a length or width or diameter of the region of interest,

wherein a central slice of the volume of interest corresponds to the plane of the displayed image.

5. The method of claim 1 , further comprising:

defining a cubic volume of interest from a square region of interest; and

defining a spherical volume of interest from a circular region of interest.

6. The method of claim 1 , further comprising:

defining for the volume of interest, a depth sampling interval smaller than a volume sampling interval; and

displaying, within the region of interest, images resulting from reconstructed slices having the smaller depth sampling interval.

7. The method of claim 1 , further comprising:

segmenting the volume of interest to detect radiological signs such as lesions or fractures;

performing background suppression processing; and/or

processing the segmented volume of interest to emphasize said detected radiological signs on the displayed images.

8. The method of claim 7 , further comprising, for each radiological sign detected in the volume of interest:

determining an optimal slice in which the radiological sign is the most clearly visible; and

combining voxels located in the optimal slice of each radiological sign to obtain the image displayed in the region of interest.

9. The method of claim 1 , further comprising:

determining a slab or three-dimensional images of the volume of interest by calculating an average intensity, maximum intensity or minimum intensity of the voxels, or any mathematical operator, along parallel or conical rays, on the height of the volume of interest.

10. The method of claim 7 , further comprising:

implementing a volume of surface rendering technique to display three-dimensional images of the segmented volume of interest.

11. The method of claim 1 , further comprising:

memorizing the position and size of the defined region of interest and/or content of the images displayed in the region of interest.

12. The method according to claim 11 , wherein when images of two-dimensional slices or slabs of the volume of interest are successively displayed, the memorized volumes of interest having an intersection with each of these images of two-dimensional slices or slabs automatically display themselves.

13. The method of claim 11 , further comprising:

displaying, in response to input received from a user, the slice that corresponds to the central slice of at least on memorized volume of interest, or

displaying, in response to input received from a user, the slab images that are centered on the central slice of at least one memorized volume of interest.

14. A system for displaying images acquired by tomosynthesis, the system comprising:

means for displaying a two-dimensional image of a slice or slab;

means for selecting, on the displayed two-dimensional image, a two-dimensional region of interest located in the plane of the image; and

means for displaying, in the displayed two-dimensional image within the region of interest at least one of:

slice images of a volume of interest associated with the two-dimensional region of interest;

three-dimensional images of the volume of interest associated with the two-dimensional region of interest; and

slabs obtained from the volume of interest associated with the two-dimensional region of interest.