Filter arrangements for mist removal include a barrier media, usually pleated, and treated with a deposit of fine fibers. The phase modulation layer comprises an electronically programmable erasable negative index material crossbar. Both the image processing is performed by a single common image processor. A pressure sensor may be contained within the chamber for monitoring pressure. This supports the communication of electronic content by using an electronic mail message to transport an electronic file attachment having instructions that, when executed by the recipient’s computer, enable the recipient to view the electronic content by accessing a server computer connected to distributed computer network. The controller configured to compare the recorded data pertaining to the at least one characteristic of tissue with the stored data pertaining to the plurality of impedance values and to adjust the tuner to one of the plurality of impedance values.