Abstract: A method and apparatus for image automatic brightness detection. The method includes determining region of interest (ROI) candidates in an image, extracting features from each of the ROI candidates, selecting the optimum ROI based on weighted score of each of the ROI candidate, and calculating brightness value of the selected optimum ROI candidate as brightness feedback. The method and apparatus for image automatic brightness detection according to embodiments of the present invention, can automatically detect the point of interest for clinicians, and then provide a more accurate feedback to the imaging system, in order to provide a more efficient dose management in the imaging system and thus to achieve constant image quality without wasting any dose, thereby further optimizing the dose/IQ performance and the high efficient utilization of the system.

Abstract: A high-density disk array device can enhance accessing capacity and heat-dissipating capacity, which includes a casing formed with an entry. A pair of disk modules and a pair of fan modules are received in the casing. The pair of disk modules can be drawn from the entry of the casing. Each of the disk modules has a plurality of hard disks received therein in a drawable way, a power module and an input/output module. The pair of fan modules are arranged adjacent to an outer side of the pair of disk modules correspondingly. A central passageway is formed between the pair of disk modules. After the disk module is drawn out from the casing, the hard disks can be drawn along a direction perpendicular to the central passageway.