Apparatus and method for reconstructing medical image
A medical image reconstruction system and method for correcting a CT image such that the CT image is located at the center of a three-dimensional (3D) space in order to overcome an error that would otherwise be formed due to an inaccurate position of a patient during Obtaining CT images. After the 3D spatial positions of a 3D medical image are corrected using 3D medical image data, a trajectory of a dental arch is detected. A two-dimensional (2D) medical image is created from the 3D medical image through automatic reconstruction on the basis of the detected trajectory of the dental arch.
1. A medical image reconstruction system comprising:
an image management system configured to be connected to an X-ray imaging system and a console for controlling the X-ray imaging system, transferring and processing an image data from the X-ray imaging system, and the image management system including a memory configured to store the image data and a processor configured to perform at least one operation of reconstructing image data,
wherein the processor is configured to extract angles of correction according to cross-sectional directions to correct a position of a three-dimensional medical image and perform geometry correction by rotating the three-dimensional medical image using the angles of correction according to cross-sectional directions, and
wherein the processor is configured to extract a reference point information from the three-dimensional medical image, extract count maps according to preset angles of rotation using image information on basis of the reference point information, and extract an angle of rotation of a minimum count map of the count maps extracted according to the angles of rotation.
2. The medical image reconstruction system according to claim 1 , wherein
the three-dimensional medical image data is medical image data produced by obtaining a computed tomography (CT) image of a head of a subject, and
the reference point information is one of information about a chin line, information about an arrangement of teeth, reference information using an object, position information of a temporomandibular joint (TMJ), and position information of eyes in the three-dimensional medical image.
3. The medical image reconstruction system according to claim 1 , wherein the processor is configured to rotate the three-dimensional medical image according to preset angles of rotation, extract image information of a region of interest on basis of the reference information from the rotated three-dimensional medical image, and extract the count maps using the image information of the region of interest.
4. The medical image reconstruction system according to claim 1 , wherein the processor is configured to extract the angles of rotation of the minimum count map by measuring a number of effective pixels of the count maps extracted according to the angles of rotation and extracting a count map having a smallest number of pixels.
5. The medical image reconstruction system according to claim 1 , wherein the processor is configured to detect a trajectory of a dental arch in the three-dimensional medical image, set an image information use area in which a panoramic image information use area including the trajectory of the dental arch is set, and reconstruct a panoramic image by summating image information of the three-dimensional medical image in the panoramic image information use area on basis of the trajectory of the dental arch.
6. The medical image reconstruction system according to claim 1 , wherein the processor is configured to set a cephalometric image information use area to be used in reconstruction of a cephalometric medical image in the three-dimensional medical image and reconstruct the cephalometric medical image by summating image information of the three-dimensional medical image in the cephalometric image information use area.
7. The medical image reconstruction system according to claim 6 , wherein the processor is configured to set position coordinates of an X-ray source using information about an image-taking sequence and set the cephalometric image information use area by summating image information of the three-dimensional medical image in the cephalometric image information use area on basis of the position coordinates of the X-ray source.
8. A medical image reconstruction system comprising:
an image management system configured to be connected to an X-ray imaging system and a console for controlling the X-ray imaging system, transferring and processing an image data from the X-ray imaging system, and the image management system including a memory configured to store the image data and a processor configured to perform at least one operation of reconstructing the image data,
wherein the processor is configured to set a standard dental arch and coordinates of a rotation center point using information about an image-taking sequence and detect a trajectory of a dental arch using the standard dental arch, and
wherein the processor is configured to detect position coordinates of an anterior occlusion in the three-dimensional medical image, detect coordinates of a fixed dental arch on basis of the position coordinates of the anterior occlusion, detect coordinates of an anterior dental arch according to cross-sections, correct coordinates of the dental arch using the coordinates of the fixed dental arch and the coordinates of the anterior dental arch, and create the trajectory of the dental arch by calculating the trajectory of the dental arch using the corrected coordinates of the dental arch.
9. A medical image reconstruction method comprising:
extracting angles of correction according to cross-sectional directions for position correction of three-dimensional medical image data; and
performing geometry correction by rotating a three-dimensional medical image using the angles of correction according to the cross-sectional directions,
wherein the medical image reconstruction method comprises:
extracting a reference point information from the three-dimensional medical image;
extracting count maps according to preset angles of rotation using image information on basis of the reference point information; and
extracting an angle of rotation of a minimum count map of the count maps extracted according to the angles of rotation.
10. The medical image reconstruction method according to claim 9 , further comprising:
setting an image information use area to be used in reconstruction of a two-dimensional medical image; and
reconstructing the two-dimensional medical image by summating the three-dimensional medical image data in the image information use area.
11. The medical image reconstruction method according to claim 10 , wherein the two-dimensional medical image comprises a panoramic image or a cephalometric image.