A transducer-activation system comprising: a data processing device system; an input-output device system communicatively connected to the data processing device system; and a memory device system communicatively connected to the data processing device system and storing a program executable by the data processing device system, the program comprising: reception instructions configured to cause reception from the input-output device system of a first sequence of transducer sets selected from a plurality of transducers (306a-p) of a catheter device, the plurality of transducers (306a-p) arranged in a distribution, the plurality of transducers (306a-p) positionable in a bodily cavity, the transducer sets in the first sequence forming a group of transducer sets, each of the transducer sets in the group comprising at least one of the plurality of transducers (306a-p); generation instructions configured to, in response to receiving at least part of the first sequence, cause generation of a second sequence of transducer sets based at least on an analysis of the transducer sets in the group, the second sequence different than the first sequence, and the transducer sets in the second sequence comprising transducers (306a-p) in the group; and activation instructions configured to cause sequential activation, initiated during or after completion of the generation of the second sequence according to the generation instructions, of the transducer sets in the second sequence according to the second sequence, the activation instructions further configured to cause activation of at least one transducer (306a-p) in each of the sequentially activated transducer sets, wherein the input-output device system comprises the catheter device, and wherein the analysis includes an analysis of a spatial relationship between a first transducer in a first one of the transducer sets in the group and a second transducer in a second one of the transducer sets in the group. a data processing device system; an input-output device system communicatively connected to the data processing device system; and a memory device system communicatively connected to the data processing device system and storing a program executable by the data processing device system, the program comprising: reception instructions configured to cause reception from the input-output device system of a first sequence of transducer sets selected from a plurality of transducers (306a-p) of a catheter device, the plurality of transducers (306a-p) arranged in a distribution, the plurality of transducers (306a-p) positionable in a bodily cavity, the transducer sets in the first sequence forming a group of transducer sets, each of the transducer sets in the group comprising at least one of the plurality of transducers (306a-p); generation instructions configured to, in response to receiving at least part of the first sequence, cause generation of a second sequence of transducer sets based at least on an analysis of the transducer sets in the group, the second sequence different than the first sequence, and the transducer sets in the second sequence comprising transducers (306a-p) in the group; and activation instructions configured to cause sequential activation, initiated during or after completion of the generation of the second sequence according to the generation instructions, of the transducer sets in the second sequence according to the second sequence, the activation instructions further configured to cause activation of at least one transducer (306a-p) in each of the sequentially activated transducer sets, reception instructions configured to cause reception from the input-output device system of a first sequence of transducer sets selected from a plurality of transducers (306a-p) of a catheter device, the plurality of transducers (306a-p) arranged in a distribution, the plurality of transducers (306a-p) positionable in a bodily cavity, the transducer sets in the first sequence forming a group of transducer sets, each of the transducer sets in the group comprising at least one of the plurality of transducers (306a-p); generation instructions configured to, in response to receiving at least part of the first sequence, cause generation of a second sequence of transducer sets based at least on an analysis of the transducer sets in the group, the second sequence different than the first sequence, and the transducer sets in the second sequence comprising transducers (306a-p) in the group; and activation instructions configured to cause sequential activation, initiated during or after completion of the generation of the second sequence according to the generation instructions, of the transducer sets in the second sequence according to the second sequence, the activation instructions further configured to cause activation of at least one transducer (306a-p) in each of the sequentially activated transducer sets, wherein the input-output device system comprises the catheter device, and wherein the analysis includes an analysis of a spatial relationship between a first transducer in a first one of the transducer sets in the group and a second transducer in a second one of the transducer sets in the group.