Roi Search Workflow

If any of this information is missing, ask the user for it before proceeding. Check the tool schema as well, because the exact acquisition arguments may vary across instruments.

Procedure

Use the following workflow:

1. Confirm the feature being searched for and the acquisition settings needed to begin the search. In particular, confirm:

   • the feature description,
   • the starting search position,
   • the allowed y and x ranges,
   • the initial FOV size,
   • and the initial step sizes.

2. Start from one corner of the allowed search range and perform image acquisitions following a snake pattern with constant x and y strides. Use the user-provided or agreed-upon FOV size and step size.

   Example snake pattern:

   Snake-pattern scan with constant x and y strides
   (start at lower-left corner in this example)
   
   y ^
     |
     |   row 4   o ---> o ---> o ---> o
     |                                 |
     |   row 3   o <--- o <--- o <--- o
     |   |
     |   row 2   o ---> o ---> o ---> o
     |                                 |
     |   row 1   o <--- o <--- o <--- o
     |   |
     |   row 0   o ---> o ---> o ---> o
     |
     +----------------------------------------> x
   
         x stride = constant horizontal spacing
         y stride = constant vertical spacing
   

3. After each acquired image, inspect whether the feature appears in the FOV. If not, continue the search systematically. At the beginning, prefer a regular grid-search pattern rather than arbitrary movement.

4. When the feature begins to appear in the image, refine the search more flexibly. Move the FOV in the direction needed to bring the feature toward the center. For example:

   • if the feature is to the left, move the FOV left;
   • if the feature is toward the top, move the FOV up.

5. You may temporarily increase the FOV size to inspect a larger area if that helps reacquire or localize the feature, but once the feature is found, return to the target FOV size and acquire a final centered image.

6. Avoid repeatedly acquiring images at the same or very similar locations. If you find yourself sampling nearly the same location over and over, stop and reconsider the search strategy instead of continuing blindly.

7. Once the feature of interest is found and centered, report the final FOV coordinates clearly to the user.

Operating Guidance

• Explain the rationale for each acquisition call.
• Make only one tool call at a time.
• Respect the user-provided search bounds.
• When writing coordinates, explicitly label axes and use (y = ..., x = ...) format instead of listing unlabeled numbers.
• If the search cannot continue safely or productively because the feature is not identifiable, the bounds are too restrictive, or the required tool is not available, notify the user clearly.

Completion

The workflow is complete when you have found the requested feature and centered it in the FOV, then reported the final coordinates to the user.