The invention relates to a pneumatic gripper assembly structure which comprised a supporting body composed of at least two wall elements or symmetrical half-shells, realized and finished individually using a forming process and then put together to form a single body capable of receiving, supporting and guiding other structural and functional components of the gripper assembly. More particularly, a manually steered \u201crapid exchange\u201d type catheter for a system for imaging, diagnosing, andor treating an area of interest in a patient’s body is provided. A sufficiently large current enough for the amplifiers to operate at a high frequency is supplied, while the current is switched to a lower supply current for the amplifier to operate at lower frequencies. The information can be stored in a memory of the appliance in a data structure having a plurality of resources organized pursuant to a Representational State Transfer resource orientated architecture. Thus, one can then adjust the antenna of the bridge until an optimum power level is achieved without using any specialized equipment, such as a voltmeter or laptop for interfacing with the bridge to obtain the signal strength indication. The existing privacy-preserving data mining approaches only consider the information the user is querying and do not consider the information the user already has, and how the user can use that information in combination with the query information to create sensitive data that the user should not have access to.