Abstract: Evaluating the performance of an X-ray tube by: recording arcing events that occurred during the use of the X-ray tube; classifying the arcing events by severity; generating, on the basis of the classified arcing events, a first growth pattern for occurrences of arcing events; and determining a level of bubbles in the X-ray tube by finding, on the basis of the first growth pattern, a matching second growth pattern associated with a known level of bubbles in the X-ray tube. An X-ray tube may be checked and replaced in a timely manner, without the need for an on-site inspection, by remotely predicting trends or patterns for growth of levels of bubbles in the X-ray tube.

Abstract: A stretchable pixel array substrate, including a base and a component layer, is provided. The base has multiple first openings and multiple second openings. Each of the first openings has a first opening extending direction. Each of the second openings has a second opening extending direction. The first opening extending direction and the second opening extending direction are different. The first openings and the second openings are alternately arranged in a first direction and a second direction to define multiple islands and multiple bridges of the base. The component layer is disposed on the base and includes multiple island portions and multiple bridge portions. The island potions have multiple pixel structures and are respectively disposed on the islands of the base. The bridge portions have conductive wires and are respectively disposed on the bridges of the base. The conductive wires are electrically connected to the pixel structures.