# Orientation of Directional Leads ## Please note: The Orientation Feature for directional leads in LEAD-DBS is still in its preliminary stage. If you already want to use it for scientific puposes please contact ## Orientation of Directional Leads When investigating the orientation of directional leads it is important to keep in mind that so far no perfect automatic algorithm to exactly determine the orientation exists. Finding the exact results for lead orientation can be made difficult by a variety of factors e.g. inaccuracies in lead manufactoring, bad image quality, or highly tilted implantation angles. All results need to be carefully evaluated in the wider context and against other sources of information - e.g. the lead orientation originally planned by the neurosurgeon or results from intraoperative xray or fluoroscopy. LEAD-DBS currently offers different workflows for determining the lead orientation from postoperative CT imaging which will be discussed in the following subchapters: 1. [Prerequisites](https://netstim.gitbook.io/leaddbs/lead-dbs/step5-optional-reconstruction-of-electrode-trajectories/determining-the-orientation-of-directional-leads/prerequisites) 2. [Automatic Algorithm](https://netstim.gitbook.io/leaddbs/lead-dbs/step5-optional-reconstruction-of-electrode-trajectories/determining-the-orientation-of-directional-leads/automatic-algorithm) 3. [Possible Problems with the Automatic Algorithm](https://netstim.gitbook.io/leaddbs/lead-dbs/step5-optional-reconstruction-of-electrode-trajectories/determining-the-orientation-of-directional-leads/possible-problems-with-the-automatic-algorithm) 4. [User-Assisted Algorithm (Manual Refine)](https://netstim.gitbook.io/leaddbs/lead-dbs/step5-optional-reconstruction-of-electrode-trajectories/determining-the-orientation-of-directional-leads/possible-problems-with-the-automatic-algorithm) 5. Manual Definition of Lead Orientation --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://netstim.gitbook.io/leaddbs/lead-dbs/step5-optional-reconstruction-of-electrode-trajectories/determining-the-orientation-of-directional-leads.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.