Abstract: A document feeding apparatus having a document feed unit adapted to feed documents, which are placed on a stacked document feed tray, sheet by sheet toward a document glass plate in an exposure unit. An auxiliary document feed tray is turnably housed in the document feed tray. The auxiliary document feed tray is turned so as to project over the stacked document feed tray when the documents are fed sheet by sheet by hand so that the front end portion of the auxiliary document feed tray narrows a document feed port of the document feed unit to render the stacked documents difficult to be inserted thereinto.

Abstract: An ultrasound diagnosing system includes an ultrasound transmission/reception section, a cross-sectional imaging section, a phase detection section, a filter section, a calculation section, a correction section and a display section. The cross-sectional imaging section causes the ultrasound transmission/reception section to perform ultrasound scanning for sending and receiving ultrasound beams a plurality of times at an identical beam position, and detects cross-sectional information on a living subject from the echo signals. The phase detection section performs quadrature detection of the echo signals. The filter section eliminates low-frequency clutter components from two sets of detected echo components. The calculating section calculates an average blood flow speed by using the outputs of the filter section by autocorrelation.