X-ray diagnostic apparatus

An X-ray diagnostic apparatus, comprising:

• an X-ray imaging unit including an X-ray tube and an X-ray detecting unit configured to generate an X-ray image;
• an image generating unit configured to generate a 3D non-blood vessel image and a 3D blood vessel image from an original 3D image generated by the X-ray diagnostic apparatus or an X-ray CT apparatus;
• a projection image generating unit configured to generate a non-blood vessel projection image from the 3D non-blood vessel image and to generates a blood vessel projection image from the 3D blood vessel image;
• a positional shift identifying unit configured to identify a positional shift between the X-ray image and the non-blood vessel projection image;
• a correcting unit configured to correct a positional shift of the blood vessel projection image on the basis of the positional shift;
• and
• a combining unit configured to combine the X-ray image and the corrected blood vessel projection image.

An X-ray diagnostic apparatus, comprising:

• an X-ray imaging unit including an X-ray tube and an X-ray detecting unit configured to generate an X-ray image;
• an image generating unit configured to generate a 3D non-blood vessel image and a 3D blood vessel image from an original 3D image generated by the X-ray diagnostic apparatus or an X-ray CT apparatus;
• a projection image generating unit configured to generate a non-blood vessel projection image from the 3D non-blood vessel image and to generates a blood vessel projection image from the 3D blood vessel image;
• a positional shift identifying unit configured to identify a positional shift between the X-ray image and the non-blood vessel projection image;
• and
• a combining unit configured to combine the X-ray image and the blood vessel projection image on the basis of the positional shift.

An image processing apparatus, comprising:

• a storage unit configured to store an X-ray image, 3D non-blood vessel image, and 3D blood vessel image associated with the same subject;
• a projection image generating unit configured to generate a non-blood vessel projection image from the 3D non-blood vessel image and to generates a blood vessel projection image from the 3D blood vessel image;
• a positional shift identifying unit configured to identify a positional shift between the X-ray image and the non-blood vessel projection image;
• and
• a combining unit configured to combine the X-ray image and the blood vessel projection image on the basis of the positional shift.