X-ray diagnostic apparatus and image processing apparatus

1. An image processing apparatus comprising:

a display unit configured to display an X-ray image;

a data storage unit configured to store a correspondence table describing a relationship between blood vessel contrasts and reference contrast medium concentrations, reference injection rates, reference blood vessel diameters, and reference X-ray conditions;

an input unit configured to receive input information including a planned value of a concentration of a contrast medium planned to be injected, a planned value of injection rate, a planned value of a blood vessel diameter, and an X-ray condition planned to be applied when an angiographic image is captured;

an acquisition unit configured to acquire a blood vessel contrast by referring to the correspondence table based on the planned value of the concentration of the contrast medium planned to be injected, the planned value of injection rate, the planned value of blood vessel diameter, and the X-ray condition;

a calculation unit configured to calculate a predictive pixel value of a region of interest set on the X-ray image based on the acquired blood vessel contrast and a pixel value of the region of interest; and

a control unit configured to control the display unit to display the X-ray image while superimposing a partial image having the calculated predictive pixel value on the region of interest.

2. The apparatus according to claim 1 , further comprising a blood vessel diameter output device configured to detect a blood vessel included in the region of interest and output a diameter of the blood vessel,

wherein the diameter of the blood vessel is used as the planned value of blood vessel diameter.

3. The apparatus according to claim 1 , wherein a plurality of regions of interest are set on the X-ray image, the plurality of regions of interest including the region of interest.

4. The apparatus according to claim 1 , wherein the input unit is configured to change a position of the region of interest on the X-ray image.

5. The apparatus according to claim 1 , wherein a plurality of regions of interest are set on the X-ray image, the plurality of regions of interest including the region of interest.

6. The apparatus according to claim 1 , wherein the input unit is configured to change a position of the region of interest on the X-ray image.

7. A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

displaying an X-ray image;

receiving input information including a planned value of a concentration of a contrast medium planned to be injected, a planned value of injection rate, a planned value of a blood vessel diameter, and an X-ray condition planned to be applied when an angiographic image is captured;

acquiring a blood vessel contrast by referring to a correspondence table based on the planned value of the concentration of the contrast medium planned to be injected, the planned value of injection rate, the planned value of blood vessel diameter, and the X-ray condition, the correspondence table describing a relationship between blood vessel contrasts and reference contrast medium concentrations, reference injection rates, reference blood vessel diameters, and reference X-ray conditions;

calculating a predictive pixel value of a region of interest set on the X-ray image based on the acquired blood vessel contrast and a pixel value of the region of interest; and

displaying the X-ray image while superimposing a partial image having the calculated predictive pixel value on the region of interest.

8. An X-ray diagnostic apparatus comprising:

an X-ray generation unit configured to generate X-rays;

a detection unit configured to detect X-rays generated from the X-ray generation unit and transmitted through an object;

an image data generation unit configured to generate X-ray image data based on the detected X-rays;

a display unit configured to display the X-ray image data as an X-ray image;

a data storage unit configured to store a correspondence table describing a relationship between blood vessel contrasts and reference contrast medium concentrations, reference injection rates, reference blood vessel diameters, and reference X-ray conditions;

an input unit configured to receive input information including a planned value of a concentration of a contrast medium planned to be injected, a planned value of injection rate, a planned value of a blood vessel diameter, and an X-ray condition planned to be applied when an angiographic image is captured;

an acquisition unit configured to acquire a blood vessel contrast by referring to the correspondence table based on the planned value of the concentration of the contrast medium planned to be injected, the planned value of injection rate, the planned value of blood vessel diameter, and the X-ray condition;

a calculation unit configured to calculate a predictive pixel value of a region of interest set on the X-ray image based on the acquired blood vessel contrast and a pixel value of the region of interest; and

a control unit configured to cause the display unit to display the X-ray image while superimposing a partial image having the calculated predictive pixel value on the region of interest.

9. The apparatus according to claim 8 , further comprising an injector configured to inject a contrast medium into the object, wherein the control unit sets the planned value of the concentration of the contrast medium planned to be injected in the injector.