Transmission X-ray data collection system and computer X-ray tomography system

Abstract

Transmitted X-ray data is acquired by irradiating X-rays of appropriate doses determined for the portions of a section containing the major axis and the portions thereof containing the minor axis respectively. An X-ray irradiating / detecting device consists mainly of an X-ray irradiator that includes an X-ray tube (20) and irradiates a fan-shaped X-ray beam (400), and an X-ray detector (24) that has a plurality of X-ray detecting elements arrayed in a direction in which the fan-shaped X-ray beam spreads and that is opposed to the X-ray irradiator with an object of imaging (8) between them. The X-ray irradiating / detecting device is rotated (2,4) about the object in order to acquire transmission X-ray data stemming from a plurality of views. At this time, the dose of the X-ray beam is differentiated between predetermined angular ranges of a section of the object shaped like an oval, which extend with the minor axis of the oval section as a centerline, and the other angular ranges.Transmitted X-ray data is acquired by irradiating X-rays of appropriate doses determined for the portions of a section containing the major axis and the portions thereof containing the minor axis respectively. An X-ray irradiating / detecting device consists mainly of an X-ray irradiator that includes an X-ray tube (20) and irradiates a fan-shaped X-ray beam (400), and an X-ray detector (24) that has a plurality of X-ray detecting elements arrayed in a direction in which the fan-shaped X-ray beam spreads and that is opposed to the X-ray irradiator with an object of imaging (8) between them. The X-ray irradiating / detecting device is rotated (2,4) about the object in order to acquire transmission X-ray data stemming from a plurality of views. At this time, the dose of the X-ray beam is differentiated between predetermined angular ranges of a section of the object shaped like an oval, which extend with the minor axis of the oval section as a centerline, and the other angular ranges.

Description

technical field [0001] The invention relates to a transmission X-ray data acquisition system and a computerized X-ray tomography system. More specifically, the present invention relates to a transmission X-ray data acquisition system for generating X-ray tomographic images based on transmitted X-ray data and a computerized X-ray system for generating tomographic images based on the collected transmission X-ray data X-ray tomography system. Background technique [0002] In a computed tomography system, an X-ray emission / detection device acquires transmitted X-ray data representing the transmitted X-rays of an imaging object and generates (reconstructs) a tomographic image of the object based on the transmitted X-rays . The X-ray emitter emits an X-ray beam with a width large enough to cover the tomographic layer or X-ray section of the object, and the X-ray beam also has a certain thickness. The X-ray detector is a multi-channel X-ray detector which has a plurality of arr...

AI Technical Summary

Problems solved by technology

At this time, the product value of tube current and energization time determined relative to the middle position of the scan is not always suitable for other positions

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