Patent Number: 
Section: claims

1. An X-ray imaging apparatus comprising:an X-ray source configured to generate and irradiate X-rays according to X-ray irradiation conditions including a tube voltage, a tube current, an exposure time, and a filter;a display configured to provide a graphic user interface to receive a selection about the X-ray irradiation conditions; anda controller configured to:calculate a conversion ratio of a dose of x-rays that have not transmitted the filter to a dose of X-rays that have transmitted the filter,calculate, based on the conversion ratio, a parameter that represents a dose of radiation, to which an influence of the filter is reflected, based on a selected X-ray irradiation conditions and control the display to display the parameter,wherein the parameter comprises at least one of a converted amount of tube current corresponding to X-rays that have transmitted the filter, an amount of dose of X-rays that have transmitted the filter, or the conversion ratio,wherein the converted amount of tube current is given by an amount of a selected tube current multiplied by the conversion ratio,wherein the amount of dose X-rays that have transmitted the filter is given by the amount of the selected tube current multiplied by a dose per amount of tube current when the selected filter is used, andwherein the controller is configured to obtain the conversion ratio of the dose of X-rays that have not transmitted the filter to the dose of X-rays that have transmitted the filter, based on the dose per amount of tube current corresponding to the selected X-ray irradiation conditions and the dose per amount of tube current corresponding to an occasion when the filter is not used in the selected X-ray irradiation conditions. 2. The X-ray imaging apparatus of claim 1, wherein the display is configured to display the parameter in a numerical value, or a diagram or image representing the numerical value. 3. The X-ray imaging apparatus of claim 1, further comprising:a storage configured to store relationships between dose per amount of tube current (mAs) and tube voltage by differing types or thickness of the filter. 4. The X-ray imaging apparatus of claim 3, wherein the controller is configured to search the storage for a dose per amount of tube current corresponding to the selected X-ray irradiation conditions, when the selection of the X-ray irradiation conditions is input. 5. The X-ray imaging apparatus of claim 4, wherein the controller is configured to additionally search for a dose per amount of tube current corresponding to the occasion when no filter is used in the selected X-ray irradiation conditions. 6. The X-ray imaging apparatus of claim 1, wherein the controller is configured to when at least one of an imaging protocol or a size of a subject is selected, control the display to display a basic X-ray irradiation condition corresponding to the selected at least one of the imaging protocol or the size of the subject. 7. The X-ray imaging apparatus of claim 6, wherein the controller is configured to obtain a parameter that represents a dose to which an influence of the filter is reflected based on the basic X-ray irradiation condition. 8. The X-ray imaging apparatus of claim 1, wherein the controller is configured to re-obtain a parameter that represents a dose of radiation, to which an influence of the filter is reflected, whenever a selection of the X-ray irradiation condition is changed, and control the display to display the parameter. 9. A control method of an X-ray imaging apparatus, the method comprising:providing a graphic user interface configured to receive a selection of an X-ray irradiation conditions including a tube voltage, a tube current, exposure time, and a filter;calculating a conversion ratio of a dose of x-rays that have not transmitted the filter to a dose of X-rays that have transmitted the filter,calculating, based on the conversion ratio, a parameter that represents a dose to which an influence of the filter is reflected based on a selected X-ray irradiation condition; anddisplaying the parameter on a display,wherein the parameter comprises at least one of a converted amount of tube current corresponding to X-rays that have transmitted the filter, an amount of dose of X-rays that have transmitted the filter, or the conversion ratio,wherein the converted amount of tube current is given by an amount of a selected tube current multiplied by the conversion ratio,wherein the amount of dose X-rays that have transmitted the filter is given by the amount of the selected tube current multiplied by a dose per amount of tube current of when the selected filter is used,wherein the calculating of the parameter comprises:obtaining the conversion ratio of the dose of X-rays that have not transmitted the filter to the dose of X-rays that have transmitted the filter, based on the dose per amount of tube current corresponding to the selected X-ray irradiation conditions and the dose per amount of tube current corresponding to an occasion when the filter is not used in the selected X-ray irradiation conditions. 10. The method of claim 9, wherein the displaying of the parameter on the display comprises:displaying the parameter in a numerical value, or a diagram or image representing the numerical value. 11. The method of claim 9, further comprising: storing relationships between dose per amount of tube current (mAs) and tube voltage by differing types or thickness of the filter in a storage. 12. The method of claim 11, wherein the obtaining of the parameter comprises:searching the storage for a dose per amount of tube current corresponding to the selected X-ray irradiation condition, when the selection of the X-ray irradiation condition is input. 13. The method of claim 12, wherein the obtaining of the parameter comprises:searching for a dose per amount of tube current corresponding to the occasion when no filter is used in the selected X-ray irradiation condition.