An image transmission apparatus is provided with a FAX modem, an encodingdecoding section, a digitizer-integrated LCD, encoded image data memory, original image data memory, and additional image data memory. The invention further relates to a corresponding method for detection of ionizing radiation and to an arrangement for use in planar beam radiography comprising the detector apparatus. Network accessible tool also includes a metes and bounds tool that draws boundaries on the map and image data in response to metes and bounds descriptions that have been entered by the Internet user. The connector further includes a reversible actuator for reversibly and nondestructively terminating the inserted field fiber to the stub fiber. The air-displacement structure can be generally wedge-shaped, cone-shaped or pyramid-shaped.