Supplementary digital content is provided to be played with primary digital content on a media device, such as a television, handheld device, smart phone, computer, and so forth. In some embodiments, a probe device includes a rigid outer cannula having a curved distal region and a flexible inner cannula slideably disposed within the rigid outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula. For temporal resolution, the tracking is done in planes through the tumor at different orientations rather than using three-dimensional scanning. If the source node comprises sufficient resources to support transmitting the isochronous data, the source node reserves resources within the source node to support transmitting the isochronous data, and transmits an ack packet from the source node to a first neighboring node. In addition to the foregoing, other aspects are described in the claims, drawings, and text.