Patent Number: 
Section: claims

1. A display control apparatus for controlling display of a radiograph to be displayed on a head mounted display, comprising:a generation unit adapted to generate an X-ray moving image by detecting X-rays that irradiate a subject;a setting unit adapted to, when displaying the X-ray moving image superimposed on a main image to be displayed on a display unit of the head mounted display, set a display ratio of the main image and the X-ray moving image in accordance with a display condition;an image composition unit adapted to generate a composite image by superimposing the X-ray moving image on the main image on the basis of the ratio set by said setting unit;a display processing unit adapted to display the composite image on the display unit of the head mounted display; anda viewpoint detection unit adapted to detect information about a viewpoint of a user who is wearing the head mounted display,wherein when said viewpoint detection unit detects that the viewpoint of the user exists in a display area of the X-ray moving image, said setting unit switches the ratio to display the X-ray moving image with a priority over the main image, andsaid image composition unit generates the composite image by superimposing the X-ray moving image on the main image on the basis of the ratio switched by said setting unit. 2. A radiographic image display control apparatus comprising:a generation unit adapted to generate an X-ray moving image by detecting X-rays that irradiate a subject;a setting unit adapted to, when displaying the X-ray moving image superimposed on a main image to be displayed on a head mounted display, set a display ratio of the main image and the X-ray moving image in accordance with a display condition;an image composition unit adapted to generate a composite image by superimposing the X-ray moving image on the main image on the basis of the ratio set by said setting unit;a display processing unit adapted to display the composite image on a display unit of the head mounted display; anda tilt detection unit adapted to detect a tilt of the head mounted display,wherein when said tilt detection unit detects that the tilt of the head mounted display is not less than a reference value, said setting unit switches the ratio to display the X-ray moving image with a priority over the main image, andsaid image composition unit generates the composite image by superimposing the X-ray moving image on the main image on the basis of the ratio switched by said setting unit. 3. A radiographic image display control apparatus comprising:a generation unit adapted to generate an X-ray moving image by detecting X-rays that irradiate a subject;a setting unit adapted to, when displaying the X-ray moving image superimposed on a main image to be displayed on a head mounted display, set a display ratio of the main image and the X-ray moving image in accordance with a display condition;an image composition unit adapted to generate a composite image by superimposing the X-ray moving image on the main image on the basis of the ratio set by said setting unit;an image display unit adapted to display the composite image on a display unit of the head mounted display;a read unit adapted to read measurement data of an auxiliary device; andan analysis unit adapted to analyze whether the measurement data falls within a normal range with respect to a reference value,wherein when said analysis unit analyzes that the measurement data falls outside the normal range with respect to the reference value, said setting unit switches the ratio to display the X-ray moving image with a priority over the main image, andsaid image composition unit generates the composite image by superimposing the X-ray moving image on the main image on the basis of the ratio switched by said setting unit.