| 摘要 |
The invention relates to means used to obtain a picture, presented in a visually perceptible form, of the internal structure of a subject in particular a biological one. According to the inventive method, X-ray radiation emitted by a source is concentrated (for example, with the aid of an X-ray lens (2)) in an area containing a point (4), placed inside an investigated field (7) of a subject (5) and to which current measurement results are related. Secondary radiation (compton, fluorescent) which emerge s within said area is transported (for example, with the aid of an X-ray lens (3)) to one or several detectors (6). A scan-out of the investigated field ( 7) of the subject (5) is performed by displacing said area, and the density of the subject at that point is determined by totaling the secondary radiation intensity values received from one or several detectors (6) and determined simultaneously with the coordinates of the point (4). The density values, together with corresponding coordinate values obtained with the aid of transducers (11), are used in the unit (12) for data processing and data display in order to create a picture of the density distribution of the substance within the investigated field of the subject. |
