US 2023/0068259 A1 · AUTO EXPOSURE CONTROL SYSTEM AND IMAGE CORRECTION METHOD

Abstract

Disclosed are an auto exposure control system and an image calibration method. The system comprises a main control unit and a plurality of auto exposure units, wherein the main control unit is connected to each of the auto exposure units; and the auto exposure units are in cascading connection. According to the system, detection of each X-ray source is realized by means of auto exposure units, such that an energy accumulation value and a KV level of X-rays are obtained; and when the energy accumulation value of X-rays reaches an energy threshold value, an auto exposure control signal is sent to a main control unit, such that the main control unit adjusts an exposure time sequence according to the auto exposure control signal, the aim of auto exposure control is achieved.

Claims21

Dependent claims

An auto exposure control system, comprising a main control unit and a plurality of auto exposure units, the main control unit being connected to each of the auto exposure units, the auto exposure units being in cascading connection, each of the auto exposure units is installed at an outlet of a corresponding X-ray source,

each of the auto exposure units being configured to receive an exposure signal sent by the main control unit to detect the corresponding X-ray source and obtain a KV level of X-rays outputted by the X-ray source, and at the same time determine whether to send an auto exposure control signal to the main control unit according to a preset condition, and
the main control unit adjusting an exposure time sequence according to receiving the auto exposure control signal to achieve an aim of auto exposure control.

An image calibration method, comprising the following steps:

step S1:
obtaining an initial reference pixel value and a current image reference pixel value of each X-ray source;
step S2:
calibrating an obtained current image of each X-ray source according to the initial reference pixel value and the current image reference pixel value of each of the X-ray sources when an image is normally acquired;
step S3:
obtaining KY calibration template coefficients of X-rays outputted by each X-ray source;
and
step S4:
performing KV calibration on the image of step S2 according to the KV calibration template coefficients of the X-rays.

6 more elements

Dependencies are inferred from the claim text.

Auto exposure control system and image correction method

Life of this patent

Auto exposure control system and image correction method

Life of this patent

Abstract

Claims21