add nesting structure to fluorescence data results

lib/imaging.py

@@ -186,13 +186,13 @@ class FluorescenceData(ImagingData):
             )
             sx, sy = lls_fit_gaussian(array, _dA)
             self.results = dict() if self.results is None else self.results
-            self.results.update(
-                {
-                    f"N_{label}": float(N),
-                    f"sx_{label}": float(sx),
-                    f"sy_{label}": float(sy)
+            self.results.update({
+                label: {
+                    "N": float(N),
+                    "sx": float(sx),
+                    "sy": float(sy)
                 }
-            )
+            })
         return self
 
 def compute_mot_number(image, QE, gain, exposure_time, solid_angle,