Abstract: Embodiments of the present invention provide a computed tomography (CT) imaging method and apparatus. The CT imaging method includes performing a three-dimensional scan of an examined site to obtain a three-dimensional scan image of the examined site and attenuation information of the examined site, the three-dimensional scan image being used to position a scan range. The method further includes calculating the tube current profile of an X-ray radiation dose for the examined site according to the three-dimensional scan image and attenuation information, and performing a main scan of the examined site according to the tube current profile to obtain a main scan image.

Abstract: Provided in embodiments of the present application are a medical image processing method, apparatus, and system. The medical image processing apparatus includes an acquisition unit, which acquires a first scout image obtained after a scout scan is performed on a subject to be examined, a first determination unit, which determines, according to a preset correspondence between a scout image and a section image, a predicted section image corresponding to a first region of interest in the first scout image, and a display unit, which displays in real time an updated predicted section image and scanning parameters corresponding to the updated predicted section image.

Abstract: The present application provides a method for obtaining a tube current value, a medical imaging system, and a non-transitory computer-readable storage medium. The example method for obtaining a tube current value includes obtaining a scanning protocol, performing a scout scan to obtain a scout image of a subject under examination, and obtaining a tube current value on the basis of a trained machine learning model, according to the scout image, the scanning protocol, and a preset image noise parameter.

Abstract: A nanoporous metal can be formed by projecting laser patterns using a spatial light modulator (SLM) onto a gold/silver alloy film immersed in diluted nitric acid solutions. Heat accumulation induced by the photothermal effect enables localized dealloying in dilute nitric acid. NPG micropatterns can be formed at the irradiated spots while the surrounding alloy remains intact.

Abstract: A nanoporous metal can be formed by projecting laser patterns using a spatial light modulator (SLM) onto a gold/silver alloy film immersed in diluted nitric acid solutions. Heat accumulation induced by the photothermal effect enables localized dealloying in dilute nitric acid. NPG micropatterns can be formed at the irradiated spots while the surrounding alloy remains intact.