diff --git a/kwave/utils/mapgen.py b/kwave/utils/mapgen.py
index ce7dbef6..629f9ed5 100644
--- a/kwave/utils/mapgen.py
+++ b/kwave/utils/mapgen.py
@@ -60,10 +60,8 @@ def make_spiral_circle_points(num_points: int, radius: float) -> np.ndarray:
 
     def make_concentric_circle_points(num_points: int, radius: float) -> Tuple[np.ndarray, int]:
         num_radial = int(np.ceil(np.sqrt(num_points / np.pi)))
-        try:
-            d_radial = radius / (num_radial - 1)
-        except ZeroDivisionError:
-            d_radial = float('inf')
+       
+        assert num_radial > 1, "The number of radial points must be greater than 1." 
 
         r = np.arange(num_radial) * (radius - d_radial / 2) / (num_radial - 1)