Lesion detecting method and lesion detecting apparatus for breast image in rotating manner
A lesion detecting method and a lesion detecting apparatus for breast image in a rotating manner are provided. In the method, a set of breast image in the rotating manner is obtained. The set of breast image in the rotating manner contains sub breast images. The sub breast image is reconstructed, to generate a reconstructed breast image. The reconstructed breast image is compared with the set of breast image in the rotating manner without being reconstructed. Accordingly, at least one lesion position would be confirmed according to the comparing result. Therefore, viewing a three-dimensional breast image would be convenient for medical staff, and false positive of detecting lesion would be reduced.
1. A lesion detecting method for breast image in a rotating manner, comprising:
obtaining a set of breast image in the rotating manner, wherein the set of breast image in the rotating manner comprises a plurality of sub breast images;
reconstructing the sub breast images to generate a reconstructed breast image; and
comparing the reconstructed breast image with the set of breast image in the rotating manner without being reconstructed to confirm at least one lesion position, comprising:
performing region segment to the set of breast image in the rotating manner without being reconstructed to generate a region segment image;
determining at least one suspicious lesion region in the region segment image;
performing a false-positive reduction operation to the at least one suspicious lesion region to determine the at least one lesion position; and
determining whether a connected lesion region exists in the reconstructed breast image according to the at least one lesion position, so as to confirm the at least one lesion position.
2. The lesion detecting method for breast image in the rotating manner as claimed in claim 1 , wherein before the step of obtaining the set of breast image in the rotating manner, the method further comprises:
respectively obtaining the sub breast images through a scanner by circling under a breast image taking container for one circle to implement rotatory scanning.
3. The lesion detecting method for breast image in the rotating manner as claimed in claim 2 , wherein the step of reconstructing the sub breast images comprises:
transforming the sub breast images into an image set according to a scanning start position, a rotation angle and a rotation direction of the scanner;
determining a missing position of a gap between each two adjacent sub breast images in the image set; and
complementing the missing position through an interpolation method.
4. The lesion detecting method for breast image in the rotating manner as claimed in claim 1 , wherein after the step of obtaining the set of breast image in the rotating manner, the method further comprises:
performing vertical projection on an image of a partial thickness region in the set of breast image in the rotating manner to generate a projection image; and
determining image quality of the set of breast image in the rotating manner according to a ratio between a shooting error type and a skin tissue type in the projection image.
5. A lesion detecting apparatus, comprising:
a memory, storing a set of breast image in a rotating manner; and
a processor, coupled to the memory, and configured to:
obtain the set of breast image in the rotating manner, wherein the set of breast image in the rotating manner contains a plurality of sub breast images;
reconstruct the sub breast images to generate a reconstructed breast image;
compare the reconstructed breast image with the set of breast image in the rotating manner without being reconstructed to confirm at least one lesion position;
perform region segment to the set of breast image in the rotating manner without being reconstructed to generate a region segment image;
determine at least one suspicious lesion region in the region segment image, performs a false-positive reduction operation to the at least one suspicious lesion region to determine the at least one lesion position; and
determine whether a connected lesion region exists in the reconstructed breast image according to the at least one lesion position, so as to confirm the at least one lesion position.
6. The lesion detecting apparatus as claimed in claim 5 , wherein the sub breast images are respectively obtained through a scanner by circling under a breast image taking container for one circle to implement rotatory scanning.
7. The lesion detecting apparatus as claimed in claim 6 , wherein the processor is further configured to:
transform the sub breast images into an image set according to a scanning start position, a rotation angle and a rotation direction of the scanner;
determine a missing position of a gap between each two adjacent sub breast images in the image set; and
complement the missing position through an interpolation method.
8. The lesion detecting apparatus as claimed in claim 5 , wherein the processor is further configured to:
perform vertical projection on an image of a partial thickness region in the set of breast image in the rotating manner to generate a projection image; and
determine image quality of the set of breast image in the rotating manner according to a ratio between a shooting error type and a skin tissue type in the projection image.