Segmented Electrode Lead Circumferential Positioning

The ring electrode is divided into multiple segmented electrodes (e.g., four segments) that can be independently controlled. This segmentation allows the system to selectively activate only the segments facing the target neural tissue, thereby directing stimulation precisely while avoiding unwanted stimulation of neighboring tissue. The segmented design maintains the circular geometry for uniform current distribution when all segments are activated together.

The system dynamically selects and activates specific electrode segments based on the desired stimulation direction. By controlling which segments are active at any given time, the system can steer the current direction dynamically to match the orientation of target neural structures, converting a static uniform radiation pattern into a dynamically controllable directed stimulation system.

Radiopaque markers are incorporated into the lead structure at specific positions corresponding to the segmented electrodes. These markers appear as distinct radiopaque features on fluoroscopic imaging, allowing clinicians to visually identify the circumferential orientation and positioning of electrodes during implantation. The markers provide clear visual cues without requiring complex electronic or mechanical systems.

The radiopaque markers serve as intermediary visual indicators that bridge the gap between the internal electrode structure and the external imaging system. During implantation, these markers are visible on fluoroscopic images, enabling the clinician to align the lead's segmented electrodes with the target neural tissue based on visual feedback from the imaging modality.

The electrode ring is divided into multiple independent segmented electrodes that can be individually controlled. This segmentation enables precise targeting of specific neural structures by activating only the segments oriented toward the target, while leaving other segments inactive. The segmented design achieves high stimulation precision while maintaining a relatively simple overall circular geometry.

The segmented electrode configuration provides multiple functions: when all segments are activated together, they function as a complete ring electrode for uniform 360-degree stimulation; when only specific segments are activated, they provide directed stimulation to specific angular regions. This multi-functionality allows the same electrode structure to adapt to different clinical requirements without requiring separate electrode designs.