Image display methods

An image display method in a Computed Tomography (CT) system, comprising steps of:

• implementing CT scanning on an inspected object to obtain CT projection data;
• reconstructing a three-dimensional image of the inspected object from the CT projection data;
• projecting data of the three-dimensional image H(x,y,z) of the inspected object in a certain angle of view, to obtain Digital Radiography (DR) data in the angle of view, wherein the data of the three-dimensional data H(x,y,z) has a dimensional size of X×Y×Z, a dimension X changes from 1 to X in a direction perpendicular to movement of a belt in a horizontal plane, a dimension Y changes from 1 to Y in a straight-up direction, and a dimension z changes from 1 to Z in a direction along the movement of the belt in the horizontal plane;
• forming a DR image based on the DR data in the angle of view;
• and
• displaying the DR image and the three-dimensional image on a screen at the same time.

An image registration method in a Digital Radiography (DR)-Computed Tomography (CT) imaging system, the DR-CT imaging system comprising a DR device and a CT device, the method comprising steps of:

• scanning, by the CT device, an inspected object to obtain CT projection data;
• reconstructing a three-dimensional image of the inspected object from the CT projection data;
• scanning, by the DR device, the inspected object to obtain a DR image;
• displaying the DR image and the three-dimensional image on a screen;
• extracting a corresponding column from data of the DR image in response to a user's selection of a particular position in the DR image;
• obtaining assistant DR data in the same angle of view as that of the DR image from the three-dimensional image;
• calculating correlations between the column in the DR image and various columns in the assistant DR data;
• and
• displaying a slice image corresponding to a column in the assistant DR data which has the largest correlation with the column in the DR image, on the screen together with the DR image at the same time.

An image registration method in a Digital Radiography (DR)-Computed Tomography (CT) imaging system, the DR-CT imaging system comprising a DR device and a CT device, the method comprising steps of:

• scanning, by the CT device, an inspected object to obtain CT projection data;
• scanning, by the DR device, the inspected object to obtain a DR image;
• displaying the DR image on a screen;
• extracting a corresponding column from data of the DR image in response to a user's selection of a particular position in the DR image;
• obtaining assistant DR data in the same angle of view as that of the DR image from the CT projection data;
• calculating correlations between the column in the DR image and various columns in the assistant DR data;
• reconstructing a three-dimensional image of the inspected object from the CT projection data;
• and
• displaying a slice image corresponding to a column in the assistant DR data which has the largest correlation with the column in the DR image, on the screen together with the DR image at the same time.