3-Dimensional image processing apparatus

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data from the plurality of mask image data and reconstructs second three-dimensional image data from the plurality of contrast image data;
• a positional deviation correcting unit that corrects positional deviation of the second three-dimensional image with respect to the first three-dimensional image on the basis of the comparison result between an anatomical structure of the first three-dimensional image data and an anatomical structure of the second three-dimensional image data, and creates third three-dimensional image data;
• and
• a processing unit that performs subtraction between the third three-dimensional image data and the first three-dimensional image data and creates fourth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data from the plurality of mask image data and reconstructs second three-dimensional image data from the plurality of contrast image data;
• a positional deviation amount calculating unit that calculates a positional deviation amount of the first three-dimensional image with respect to the second three-dimensional image on the basis of the comparison result between a partial region of the first three-dimensional image data and a partial region of the second three-dimensional image data;
• a positional deviation correcting unit that corrects the first three-dimensional image on the basis of the calculated positional deviation amount and creates third three-dimensional image data, and
• a processing unit that performs subtraction between the second three-dimensional image data and the third three-dimensional image data and creates fourth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data from the plurality of mask image data and reconstructs second three-dimensional image data from the plurality of contrast image data;
• a positional deviation amount calculating unit that calculates a positional deviation amount of the second three-dimensional image with respect to the first three-dimensional image on the basis of the comparison result between a partial region of the first three-dimensional image data and a partial region of the second three-dimensional image data;
• a positional deviation correcting unit that corrects the second three-dimensional image data on the basis of the calculated positional deviation amount and creates third three-dimensional image data, and
• a processing unit that performs subtraction between the third three-dimensional image data and the first three-dimensional image data and creates fourth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data and second three-dimensional image data having a lower resolution than the first three-dimensional image data from the plurality of mask image data and reconstructs third three-dimensional image data and fourth three-dimensional image data having a lower resolution than the third three-dimensional image data from the plurality of contrast image data;
• a positional deviation amount calculating unit that calculates a positional deviation amount of the second three-dimensional image with respect to the fourth three-dimensional image;
• a positional deviation correcting unit that corrects the first three-dimensional image on the basis of the calculated positional deviation amount and creates fifth three-dimensional image data, and
• a processing unit that performs subtraction between the third three-dimensional image data and the fifth three-dimensional image data and creates sixth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data and second three-dimensional image data having a lower resolution than the first three-dimensional image data from the plurality of mask image data and reconstructs third three-dimensional image data and fourth three-dimensional image data having a lower resolution than the third three-dimensional image data from the plurality of contrast image data;
• a positional deviation amount calculating unit that calculates a positional deviation amount of the fourth three-dimensional image with respect to the second three-dimensional image;
• a positional deviation correcting unit that corrects the third three-dimensional image on the basis of the calculated positional deviation amount and creates fifth three-dimensional image data, and
• a processing unit that performs subtraction between the fifth three-dimensional image data and the first three-dimensional image data and creates sixth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data and second three-dimensional image data having a lower resolution than the first three-dimensional image data from the plurality of mask image data and reconstructs third three-dimensional image data and fourth three-dimensional image data having a lower resolution than the third three-dimensional image data from the plurality of contrast image data;
• a first positional deviation amount calculating unit that calculates a first positional deviation amount of the second three-dimensional image with respect to the fourth three-dimensional image;
• a second positional deviation amount calculating unit that calculates a second positional deviation amount of the first three-dimensional image with respect to the third three-dimensional image using the calculated first positional deviation amount;
• a positional deviation correcting unit that corrects the first three-dimensional image on the basis of the calculated second positional deviation amount and creates fifth three-dimensional image data, and
• a processing unit that performs subtraction between the third three-dimensional image data and the fifth three-dimensional image data and creates sixth three-dimensional image data.

A three-dimensional image processing apparatus comprising:

• a storage unit that stores data of a plurality of mask images and data of a plurality of contrast images, each of the plurality of mask images being obtained by radiographing a subject to be examined in a different direction before contrast medium injection, each of the plurality of contrast images being obtained by radiographing the subject to be examined in a different direction after the contrast medium injection;
• a reconstruction unit that reconstructs first three-dimensional image data and second three-dimensional image data having a lower resolution than the first three-dimensional image data from the plurality of mask image data and reconstructs third three-dimensional image data and fourth three-dimensional image data having a lower resolution than the third three-dimensional image data from the plurality of contrast image data;
• a first positional deviation amount calculating unit that calculates a first positional deviation amount of the fourth three-dimensional image with respect to the second three-dimensional image;
• a second positional deviation amount calculating unit that calculates a second positional deviation amount of the third three-dimensional image with respect to the first three-dimensional image using the calculated first positional deviation amount;
• a positional deviation correcting unit that corrects the third three-dimensional image on the basis of the calculated second positional deviation amount and creates fifth three-dimensional image data, and
• a processing unit that performs subtraction between the fifth three-dimensional image data and the first three-dimensional image data and creates sixth three-dimensional image data.