diff --git a/src/pg_rad/physics/fluence.py b/src/pg_rad/physics/fluence.py
index 874fb4e..20a232d 100644
--- a/src/pg_rad/physics/fluence.py
+++ b/src/pg_rad/physics/fluence.py
@@ -100,13 +100,13 @@ def calculate_count_rate_per_second(
     return total_phi
 
 
-def calculate_fluence_along_path(
+def calculate_counts_along_path(
     landscape: "Landscape",
     detector: "IsotropicDetector | AngularDetector",
     acquisition_time: int,
     points_per_segment: int = 10,
 ) -> Tuple[np.ndarray, np.ndarray]:
-    """Compute the fluence along a full path in the landscape.
+    """Compute the counts recorded in each acquisition period in the landscape.
 
     Args:
         landscape (Landscape): _description_
@@ -114,7 +114,8 @@ def calculate_fluence_along_path(
         points_per_segment (int, optional): _description_. Defaults to 100.
 
     Returns:
-        Tuple[np.ndarray, np.ndarray]: _description_
+        Tuple[np.ndarray, np.ndarray]: Array of acquisition points and
+            integrated count rates.
     """
 
     path = landscape.path
diff --git a/src/pg_rad/simulator/engine.py b/src/pg_rad/simulator/engine.py
index 4a05e5f..3af7d9e 100644
--- a/src/pg_rad/simulator/engine.py
+++ b/src/pg_rad/simulator/engine.py
@@ -7,7 +7,7 @@ from pg_rad.simulator.outputs import (
     SourceOutput
 )
 from pg_rad.detector.detectors import IsotropicDetector, AngularDetector
-from pg_rad.physics.fluence import calculate_fluence_along_path
+from pg_rad.physics.fluence import calculate_counts_along_path
 from pg_rad.utils.projection import minimal_distance_to_path
 from pg_rad.inputparser.specs import RuntimeSpec, SimulationOptionsSpec
 
@@ -40,7 +40,7 @@ class SimulationEngine:
         )
 
     def _calculate_count_rate_along_path(self) -> CountRateOutput:
-        arc_length, phi = calculate_fluence_along_path(
+        arc_length, phi = calculate_counts_along_path(
             self.landscape,
             self.detector,
             acquisition_time=self.runtime_spec.acquisition_time