X-ray image diagnostic apparatus

Patent metadata

Field	Value
Publication number	US-9474464-B2
Application number	US-201313782196-A
Country	US
Kind code	B2
Filing date	Mar 1, 2013
Priority date	Mar 6, 2012
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

An X-ray image diagnostic apparatus includes an X-ray imager, an image data generator, a position information acquisition mechanism, a position information corrector, and a display. The X-ray imager generates projection data by X-ray imaging in first and second imaging modes for a patient. The image data generator generates reference image data based on projection data in the first imaging mode and image data for positional deviation correction based on projection data in the second imaging mode. The position information acquisition mechanism acquires position information of a treatment device inserted into the patient. The position information corrector corrects the position information of the treatment device based on the position information of the treatment device and treatment device information of the image data for positional deviation correction, collected by X-ray imaging in the second imaging mode. The display displays the reference image data to which the corrected position information is added.

First claim

What is claimed is:

1. An X-ray image diagnostic apparatus comprising:
an X-ray imager configured to generate projection data by performing X-ray imaging in first and second imaging modes for a patient;
an image data generation processor configured to generate reference image data based on projection data in the first imaging mode and image data for positional deviation correction based on projection data in the second imaging mode, the second imaging mode utilizing low-rate or intermittent X-ray imaging compared to the first imaging mode;
a position information acquisition processor configured to acquire position information of a treatment device inserted into a body of the patient;
a position information correction processor configured to correct the position information of the treatment device on the basis of the position information of the treatment device and treatment device information of the image data for positional deviation correction, which is collected by X-ray imaging in the second imaging mode utilizing low-rate or intermittent X-ray imaging for the patient to whom the treatment device has been inserted;
a display configured to display the reference image data to which the corrected position information is added; and
an imaging timing setting processor configured to set an imaging timing in the second imaging mode on the basis of measurement results using measurement functions,
wherein the imaging timing setting processor includes at least one of an elapsed time measurement function of measuring an elapsed time from a start instruction signal of the second imaging mode or a preceding imaging timing signal, a device movement speed measurement function of measuring a movement speed of the treatment device, and a correction data measurement function of measuring a size of correction data.

2. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
a correction data generation processor configured to generate correction data on the basis of the position information of the treatment device and the treatment device information of the image data for positional deviation correction,
wherein the position information correction processor corrects a positional deviation for the treatment device information of the position information, which is supplied in time series from the treatment device, using the correction data.

3. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
a data combination processor configured to generate display data for treatment device monitoring to check a position of the treatment device by superimposing corrected position information of the treatment device on the reference image data,
wherein the display displays the display data for treatment device monitoring generated by the data combination processor.

4. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
a diaphragm moving mechanism that sets an X-ray irradiation range in the first imaging mode and an X-ray irradiation range in the second imaging mode for the patient and a moving mechanism control processor configured to control movement of the diaphragm moving mechanism,
wherein the moving mechanism control processor forms the X-ray irradiation range in the second imaging mode, which is smaller than the X-ray irradiation range in the first imaging mode including the treatment device, by moving the diaphragm moving mechanism in a predetermined direction on the basis of the position information of the treatment device.

5. The X-ray image diagnostic apparatus according to claim 1 ,
wherein the imaging timing setting processor has at least one of a contrast agent injection period determination function of determining a period, for which a contrast agent is injected into the body of the patient, and a positioning setting period determination function of determining a setting period of an imaging position or an imaging direction for the patient, and stops a setting of the imaging timing on the basis of determination results using the determination functions.

6. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
an instruction signal input configured to input an imaging instruction signal when the treatment device is close to a region of interest of the patient,
wherein the imaging timing setting processor sets the imaging timing in the second imaging mode on the basis of the imaging instruction signal.

7. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
a pixel value measurement processor configured to measure a pixel value in an evaluation region having a predetermined size based on image data for positional deviation correction collected in advance or treatment device information of the image data for positional deviation correction; and
an X-ray irradiation condition update processor configured to update X-ray irradiation conditions, which are set in advance for image data for positional deviation correction subsequent to the image data for positional deviation correction, on the basis of a measurement result of the pixel value.

8. The X-ray image diagnostic apparatus according to claim 1 ,
wherein the X-ray imager performs X-ray imaging in the first imaging mode for the patient to whom a contrast agent is injected, and performs X-ray imaging in the second imaging mode for the patient to whom the treatment device is inserted.

9. The X-ray image diagnostic apparatus according to claim 1 ,
wherein the position information acquisition processor acquires the position information of the treatment device using a GPS.

10. The X-ray image diagnostic apparatus according to claim 1 , further comprising:
a magnetic field generator that generates a magnetic field,
wherein the position information acquisition processor acquires the position information of the treatment device on the basis of a signal based on a detected magnetic field from the treatment device having a magnetic sensor that detects the magnetic field generated by the magnetic field generator.

Assignees

• Toshiba Medical Sys Corp

Inventors

• Iwai Haruki
• Abe Shingo
• Ohashi Shumpei
• Ohishi Satoru

Classifications

• A61B6/542

  involving control of exposure · CPC title

• A61B6/5258

  involving detection or reduction of artifacts or noise · CPC title

• A61B5/062

  using magnetic field · CPC title

• A61B6/032

  Transmission computed tomography [CT] · CPC title

• A61B5/061 Primary

  Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body (A61B1/00158 takes precedence) · CPC title