X-ray diagnosis apparatus and control method

1. An X-ray diagnosis apparatus, comprising:

an X-ray tube configured to irradiate a treatment target part of a subject with an X-ray;

an X-ray detector configured to detect the X-ray transmitted through the subject and output a signal; and

processing circuitry configured to

generate a sequence of images in a time-series manner based on the signal during one period of a heartbeat of the subject;

detect a position of a tip of a catheter, which moves due to the heartbeat of the subject, in each of the sequence of images;

store, in a memory, transfer trace information including the detected position of the tip of the catheter in each of the sequence of images;

create tip trace data representing positions of the tip at a plurality of time points during the period of the heartbeat by generating a curve or a closed loop by tracing the positions of the detected tip of the catheter based on the stored transfer trace information, the tip trace data representing the curve or the closed loop;

superimpose the generated curve or the closed loop onto present image data to create support data; and

cause a display to display the support data.

2. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:

create the tip trace data by extracting the transfer trace information of the tip of the catheter during the heartbeat with a heartbeat time phase as supplementary information out of various transfer trace information stored in the memory.

3. The X-ray diagnosis apparatus according to claim 2 , wherein the processing circuitry is further configured to set the heartbeat time phase based on electrocardiographic waveforms in the period of the heartbeat collected from the subject, and

add the heartbeat time phase to the transfer trace information of the tip of the catheter in each heartbeat time phase and store the resulting information in the memory.

4. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to store, in the memory, the transfer trace information in the period of the heartbeat detected in a time period in which myocardial potential collected from the treatment target part indicates a larger value than a predetermined threshold.

5. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to

detect position deviation between a catheter for measurement specifying a position of the treatment target part and a catheter for treatment performing treatment on the treatment target part, based on tip position information of the catheter, and

create an alarm signal when the position deviation is larger than a threshold.

6. The X-ray diagnosis apparatus according to claim 1 , further comprising an X-ray controller configured to control a repetition frequency of the X-ray irradiation in a reference data collection mode in which tip position information of the catheter for measurement specifying a position of the treatment target part is detected and in a support data creation mode in which the support data is created, wherein

the X-ray controller is further configured to set the repetition frequency of the X-ray irradiation in the reference data collection mode higher than the repetition frequency of the X-ray irradiation in the support data creation mode.

7. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to cause the display to display the tip trace data using a color tone, a brightness, or a degree of transparency different from that of the image data onto which the tip trace data is superimposed.

8. The X-ray diagnosis apparatus according to claim 1 , wherein

the X-ray diagnosis apparatus is a bi-plane X-ray diagnosis apparatus configured to perform imaging from two directions at the same time, and

the processing circuitry is further configured to cause the display to display each piece of the support data in which the tip trace data is superimposed onto each piece of image data imaged from the two directions.

9. A control method, comprising:

generating a sequence of images in a time-series manner based on a signal outputted from an X-ray detector detecting an X-ray irradiated by an X-ray tube and transmitted through a subject during a one period of a heartbeat of the subject;

detecting a position of a tip of a catheter, which moves due to the heartbeat of the subject, in each of the sequence of images;

storing, in a memory, transfer trace information including the detected position of the tip of the catheter in each of the sequence of images;

creating tip trace data representing positions of the tip at a plurality of time points during the period of the heartbeat by generating a curve or a closed loop by tracing positions of the detected tip of the catheter based on the stored transfer trace information of the tip of the catheter, the tip trace data representing the curve or the closed loop;

superimposing the generated curve or the closed loop onto present image data to create support data; and

displaying the support data on a display.

10. An X-ray diagnosis apparatus, comprising:

an X-ray tube configured to irradiate a treatment target part of a subject with an X-ray;

an X-ray detector configured to detect the X-ray transmitted through the subject and output a signal; and

processing circuitry configured to

generate a sequence of images in a time-series manner based on the signal during one period of a heartbeat of the subject;

detect a position of a tip of a catheter, which moves due to the heartbeat of the subject, in each of the sequence of images;

store, in a memory, transfer trace information including the detected position of the tip of the catheter in each of the sequence of images;

create tip trace data representing positions of the tip at a plurality of time points during the period of the heartbeat by generating a smooth closed loop by tracing the positions of the detected tip of the catheter based on the stored transfer trace information, the tip trace data representing the smooth closed loop;

superimpose the generated smooth closed loop onto present image data to create support data; and

cause a display to display the support data.