X-ray imaging apparatus and method for moving X-ray detector
View Patent ↗An X-ray imaging apparatus includes an X-ray irradiating unit configured to irradiate an X-ray to an object, an X-ray detecting unit configured to detect the irradiated X-ray, an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit, a moving mechanism configured to move the X-ray detecting unit to the object, a capacitance sensing unit, including an electrode which is positioned so as to cover at least part of a detection plane of the X-ray detecting unit, configured to obtain a capacitance value of the X-ray detecting unit by the electrode and a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the capacitance value.
1. An X-ray imaging apparatus, comprising:
an X-ray irradiating unit configured to irradiate an X-ray to an object;
an X-ray detecting unit configured to detect the irradiated X-ray;
an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit;
a moving mechanism configured to move the X-ray detecting unit to the object;
a capacitance sensing unit, including an electrode which is positioned so as to cover at least part of a detection plane of the X-ray detecting unit, configured to obtain a capacitance value of the X-ray detecting unit by the electrode;
an adjustment unit configured to correct the capacitance value based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
2. The X-ray imaging apparatus according to claim 1 , wherein the electrode covers a whole area of the detection plane of the X-ray detecting unit.
3. The X-ray imaging apparatus according to claim 1 , wherein the electrode is a carbon sheet.
4. The X-ray imaging apparatus according to claim 3 , wherein the X-ray detecting unit including a flat panel detector where a plurality of X-ray detection elements are arranged two dimensionally.
5. The X-ray imaging apparatus according to claim 4 , wherein the electrode is divided into quadrants aligned with an X-ray detection plane of the X-ray detection elements.
6. The X-ray imaging apparatus according to claim 1 , wherein the electrode is divided to a plurality of electrodes, and the capacitance sensing unit obtains capacitance values of the plurality of electrodes.
7. The X-ray imaging apparatus according to claim 6 , wherein the electrode is divided to four electrodes.
8. The X-ray imaging apparatus according to claim 1 ,
wherein the corrected capacitance is additionally based on environmental data regarding a temperature and a humidity around the object.
9. The X-ray imaging apparatus according to claim 1 , wherein the moving mechanism stops the X-ray detecting unit based on the measured distance before the X-ray detecting unit contacts the object.
10. The X-ray imaging apparatus according to claim 1 , wherein the moving mechanism changes a moving speed of the X-ray detecting unit based on the measured distance.
11. An X-ray imaging apparatus, comprising:
an X-ray irradiating unit configured to irradiate an X-ray to an object;
an X-ray detecting unit configured to detect the irradiated X-ray;
an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit;
a moving mechanism configured to move the X-ray detecting unit to the object;
a capacitance sensing unit including an electrode and configured to obtain a capacitance value of the X-ray detecting unit by the electrode;
an environment sensing unit configured to obtain environment information around the object;
a capacitance correction unit configured to correct the capacitance value based on the environment information and based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
12. An X-ray imaging apparatus, comprising:
an X-ray irradiating unit configured to irradiate an X-ray to an object;
an X-ray detecting unit configured to detect the irradiated X-ray;
an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit;
a moving mechanism configured to move the X-ray detecting unit to the object;
a capacitance sensing unit including an electrode and configured to obtain a capacitance value of the X-ray detecting unit by the electrode;
an input device configured to input information of the object;
a capacitance correction unit configured to correct the capacitance value based on the object information and based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
13. An X-ray imaging apparatus, comprising:
an X-ray irradiating unit configured to irradiate an X-ray to an object;
an X-ray detecting unit configured to detect the irradiated X-ray;
an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit;
a moving mechanism configured to move the X-ray detecting unit to the object;
a capacitance sensing unit including an electrode and configured to obtain a capacitance value of the X-ray detecting unit by the electrode;
an input device configured to input information of the object;
a capacitance correction unit configured to correct the capacitance value based on the object information; and
a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the corrected capacitance value
wherein the object information includes at least one of shape, age, sex and degree of obesity of the object.
14. An X-ray imaging apparatus, comprising:
an X-ray irradiating unit configured to irradiate an X-ray to an object;
an X-ray detecting unit configured to detect the irradiated X-ray;
an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit;
a moving mechanism configured to move the X-ray detecting unit to the object;
a capacitance sensing unit including an electrode and configured to measure a capacitance value between the electrode and the object;
an input device configured to input information of the object;
a capacitance correction unit configured to correct the measured capacitance value based on the object information; and
a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
15. A method for moving an X-ray detector, comprising:
irradiating an X-ray to an object by an X-ray irradiating unit;
detecting the irradiated X-ray by an X-ray detecting unit;
creating X-ray image data based on data detected in the detecting;
moving the X-ray detecting unit to the object;
obtaining a capacitance value of the X-ray detecting unit by an electrode which is positioned so as to cover at least part of a detection plane of the X-ray detecting unit;
correcting the capacitance value based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
measuring a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
16. A method for moving an X-ray detector, comprising:
irradiating an X-ray to an object by an X-ray irradiating unit;
detecting the irradiated X-ray by an X-ray detecting unit;
creating X-ray image data based on data detected by the X-ray detecting unit;
moving the X-ray detecting unit to the object;
obtaining a capacitance value of the X-ray detecting unit;
obtaining environment information around the object;
correcting the capacitance value based on the environment information and based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
measuring a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
17. A method for moving an X-ray detector, comprising:
irradiating an X-ray to an object by an X-ray irradiating unit;
detecting the irradiated X-ray by an X-ray detecting unit;
creating X-ray image data based on data detected by the X-ray detecting unit;
moving the X-ray detecting unit to the object;
obtaining a capacitance value of the X-ray detecting unit;
inputting information of the object;
correcting the capacitance value based on the object information and based on a selection of a correction coefficient from a plurality of correction coefficients related to object information; and
measuring a distance between the object and the X-ray detecting unit based on the corrected capacitance value.
18. A method for moving an X-ray detector, comprising:
irradiating an X-ray to an object by an X-ray irradiating unit;
detecting the irradiated X-ray by an X-ray detecting unit;
creating X-ray image data based on data detected by the X-ray detecting unit;
moving the X-ray detecting unit to the object;
measuring a capacitance value between an electrode of the X-ray detecting unit and the object;
inputting information of the object;
correcting the capacitance value based on the object information; and
measuring a distance between the object and the X-ray detecting unit based on the corrected capacitance value.