Abstract: A method for performing lawful intercept of mobile units in proximity to a target mobile unit is provided. A first mobile unit to target is identified. A geographical area about the first mobile unit is defined. Wireless networks record any other mobile units that enter the geographical area and report these mobile units to a law enforcement agency.

Abstract: A method for performing video surveillance of a mobile unit in a wireless network is provided. A wireless network receives a surveillance request for a mobile unit. The surveillance request comes from a law enforcement agency and includes the identity of the mobile unit and a geographical area. The wireless network determines that the mobile unit has entered the geographical area and sends the geographical location of the mobile unit from the wireless network to the law enforcement agency.

Abstract: A plurality of registration messages are received at a base station from a plurality of mobile units. The base station collects these registration messages for a predetermined period of time. At the end of the predetermined period of time, the base station sends the registration messages, or a summary of the registration messages, to a wireless network. The wireless network examines the registration messages to determine if the number of registration messages received for a predefined geographic area exceeds a predetermined threshold. If so, the wireless network sends a crowd information update message to a law enforcement agency if the plurality of registration message exceed a predetermined threshold.

Abstract: The invention provides systems, including a methods and apparatus, for providing seamless telephone service across MSC's that support multiple or different protocols. In accordance with a preferred embodiment of the invention, the home mobile switching center, where the subscriber record is stored, is equipped to respond to a first inquiry signal from an originating mobile switching center by identifying itself to the originating mobile switching center. The incoming call may then be trunked to the home mobile switching center and forwarded to the visited mobile switching center according to the second protocol. According to another preferred embodiment, in response to the first inquiry signal, the home mobile switching center sends a second inquiry signal to the visited mobile switching center. The first inquiry signal represents a request for an identification number identifying, in the first protocol, the visited mobile switching center.

Abstract: A phantom (FIG. 1) has a bone mineral standard (B) surrounded by tissue equivalent material (A) with a plurality of different cross sections. The phantom is disposed in an image region (44) of a tomographic scanner (FIG. 2). Scans are conducted through a plurality of different cross sections of the phantom to reconstruct a plurality of phantom image representations (62). The plurality of phantom image representations are stored by size in a correction memory (70). Thereafter, a patient is disposed on a patient table (50) in the image region and an image is taken through the patient's mid-section between the L2 and L5 vertebrae. A patient image representation is reconstructed and stored in an image memory (64). A slice size calculation circuit (72) determines the size of the patient slice. The correction memory is addressed with the calculated size to retrieve the phantom image representation of the most similar size.