X-ray diagnosis apparatus

Patent metadata

Field	Value
Publication number	US-12329552-B2
Application number	US-202218060324-A
Country	US
Kind code	B2
Filing date	Nov 30, 2022
Priority date	Nov 30, 2021
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

According to an embodiment, there is provided that processing circuitry configured to determine a first radiation timing at which a subject is irradiated with an X-ray, based on information on motion of an object in X-ray image data, the information on motion being calculated by the X-ray image data, the X-ray image data being associated with an electrocardiographic waveform of the subject, and repeatedly irradiate the subject with an X-ray at the first radiation timing per cycle of the electrocardiographic waveform of the subject.

First claim

What is claimed is:

1. An X-ray diagnosis apparatus, comprising:
processing circuitry configured to:
obtain an electrocardiographic waveform of a subject and a detection signal;
generate X-ray image data of the subject from the obtained detection signal such that the generated X-ray image data is associated with the obtained electrocardiographic waveform based on a predetermined time;
detect motion of an object rendered in each of a plurality of frames of the generated X-ray image data;
determine a first radiation timing as a cardiac phase corresponding to one of the frames exhibiting the object least moving; and
repeatedly irradiate the subject with an X-ray at the first radiation timing in each cycle of the electrocardiographic waveform of the subject.

2. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
display a graph, the electrocardiographic waveform of the subject, and an operative element on a display in association with one another, the graph representing a magnitude of motion in each of the frames included in the X-ray image data, the operative element allowing a user to at least either change the first radiation timing or add another radiation timing, and
receive at least either a change or an addition made by the user with the operative element.

3. The X-ray diagnosis apparatus according to claim 2 , wherein the processing circuitry is further configured to display at least either the graph or the electrocardiographic waveform on the display in association with at least one of the first radiation timing and an end-systolic phase and a mid-diastolic phase of the electrocardiographic waveform.

4. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
display a plurality of X-ray images based on the plurality of frames included in the X-ray image data and the electrocardiographic waveform of the subject on a display in association with each other, and
receive at least either a change of the first radiation timing or an addition of another radiation timing made by a user with reference to the electrocardiographic waveform.

5. The X-ray diagnosis apparatus according to claim 4 , wherein the processing circuitry is further configured to display the electrocardiographic waveform on the display in association with at least one of the first radiation timing and an end-systolic phase and a mid-diastolic phase of the electrocardiographic waveform.

6. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
detect a change in position of a device rendered in each pair of two chronologically adjacent frames among the plurality of frames included in the generated X-ray image data, and
add the two chronologically adjacent frames of each pair to generate added frames, and
determine, as the first radiation timing, a cardiac phase corresponding to an added frame exhibiting the device least changing in position among the added frames.

7. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
detect a change in position of a device rendered in each pair of two frames corresponding to a same cardiac phase of two cycles of the electrocardiographic waveform of the subject among the plurality of frames included in the generated X-ray image data corresponding to the two cycles, and
add the two frames of each pair corresponding to the same cardiac phase to generate added frames, and
determine, as the first radiation timing, a cardiac phase corresponding to an added frame exhibiting the device least changing in position among the added frames.

8. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
display a graph, the electrocardiographic waveform of the subject, and an operative element on a display in association with one another, the graph representing a magnitude of motion in each of the frames included in the generated X-ray image data, the operative element that allows a user to at least either change the first radiation timing or add another radiation timing, and
receive at least either a change or an addition made by the user with the operative element.

9. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
display a plurality of X-ray images, based on the plurality of frames included in the generated X-ray image data, and the electrocardiographic waveform of the subject on a display in association with each other, and
receive at least either a change of the first radiation timing or an addition of another radiation timing made by a user with reference to the electrocardiographic waveform.

10. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
detect motion of a device rendered in the plurality of frames included in the generated X-ray image data on a frame basis, and
determine, as the first radiation timing, a cardiac phase corresponding to a frame exhibiting the device least moving as detected among the plurality of frames of the generated X-ray image data.

11. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
detect a change in position of a device rendered in each pair of two chronologically adjacent frames among the plurality of frames included in the generated X-ray image data, and
add the two chronologically adjacent frames of each pair to generate added frames, and
determine, as the first radiation timing, a cardiac phase corresponding to an added frame exhibiting the device least changing in position among the added frames.

12. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to:
detect a change in position of a device rendered in each pair of two frames corresponding to a same cardiac phase of two cycles of the electrocardiographic waveform of the subject among the plurality of frames included in the generated X-ray image data corresponding to the two cycles, and
add the two frames of each pair corresponding to the same cardiac phase to generate added frames, and
determine, as the first radiation timing, a cardiac phase corresponding to an added frame exhibiting the device least changing in position among the added frames.

13. The X-ray diagnosis apparatus according to claim 1 , wherein the processing circuitry is further configured to determine a predetermined number of X-ray radiation timings per cycle of the electrocardiographic waveform of the subject, in addition to the first radiation timing.

14. The X-ray diagnosis apparatus according to claim 1 , further comprising an X-ray detector configured to accumulate and read electric charge in a regular cycle,
wherein the processing circuitry is further configured to adjust the first radiation timing or another radiation timing in line with a charge accumulation period of the X-ray detector.

15. An X-ray diagnosis apparatus comprising:
processing circuitry configured to:
obtain an electrocardiographic waveform of a subject and a detection signal;
generate X-ray image data of the subject from the obtained detection signal such that the generated X-ray image data is associated with the obtained electrocardiographic waveform based on a predetermined time;
detect motion of an object rendered in each of a plurality of frames of the generated X-ray image data;
display a graph, the electrocardiographic

Assignees

• Canon Medical Systems Corp

Inventors

• Matsumoto Masanori
• Oikawa Hirona
• Abe Shingo
• Tetsuka Akio
• Sato Yoshiyuki
• Kanno Yusuke
• Uehara Hisayuki

Classifications

• A61B6/547

  involving tracking of position of the device or parts of the device · CPC title

• A61B6/5247

  combining images from an ionising-radiation diagnostic technique and a non-ionising radiation diagnostic technique, e.g. X-ray and ultrasound · CPC title

• A61B6/4441

  the rigid structure being a C-arm or U-arm · CPC title

• A61B6/42

  Arrangements for detecting radiation specially adapted for radiation diagnosis · CPC title

• A61B5/7292

  Prospective gating, i.e. predicting the occurrence of a physiological event for use as a synchronisation signal · CPC title