A freestanding splatter shield for use in kitchens and other food processing work areas including a central panel and first and second end panels pivotally attached to the respective opposite end portions of the central panel. The method of keeping a refreshed image from a camera on a user’s system comprises sending the image to the user’s system and refreshing the image when a refresh period has elapsed. The transmitter also includes means for selecting a new coding rate for a following transmission on the basis of the maximum limit of the combined coding rate and the first coding rate if a retransmission is required. The gate of the first MOS transistor is connected to the input portion of an even-numbered boost unit from the VPP node. The first switching oil passage and the second switching oil passage are formed in a ladder shape in which the first switching oil passage and the second switching oil passage communicate via a plurality of relay oil passages. In accordance with an embodiment of the present invention, the image frames for forming a composite image may be obtained, thereby ultimately causing the quality of the ultrasound image to be enhanced.