The invention provides a switching power supply device which can detect a light load state on a pulse-by-pulse basis without worsening power efficiency. In addition to providing a richer review format that is aesthetically pleasing, photo-reviews may be associated with a ranking provided by a user. An additional pass gate is operatively connected to the first latch logic circuit. The longitudinal seams of the film bags are reinforced. Thus in a ventricle a lesioned or viable part of myocardium can be readily identified in location, size, geometry and level.