fix(apps/nuclick): replace np.random.choice with self.R.choice in AddPointGuidanceSignald

In AddPointGuidanceSignald.exclusion_map, two calls to np.random.choice were using the global NumPy random state instead of the instance's self.R (RandomState). Since AddPointGuidanceSignald already inherits from Randomizable, replacing with self.R.choice ensures reproducibility when set_determinism() or manual seeding is used.

Ref #6888
Signed-off-by: Zeeshan Modi <92383127+Zeesejo@users.noreply.github.com>

Signed-off-by: Zeeshan Modi <92383127+Zeesejo@users.noreply.github.com>

Author: Zeesejo

monai/apps/nuclick/transforms.py

@@ -367,14 +367,14 @@ def inclusion_map(self, mask, dtype):
 
     def exclusion_map(self, others, dtype, jitter_range, drop_rate):
         point_mask = torch.zeros_like(others, dtype=dtype)
-        if np.random.choice([True, False], p=[drop_rate, 1 - drop_rate]):
+        if self.R.choice([True, False], p=[drop_rate, 1 - drop_rate]):
             return point_mask
 
         max_x = point_mask.shape[0] - 1
         max_y = point_mask.shape[1] - 1
         stats = measure.regionprops(convert_to_numpy(others))
         for stat in stats:
-            if np.random.choice([True, False], p=[drop_rate, 1 - drop_rate]):
+            if self.R.choice([True, False], p=[drop_rate, 1 - drop_rate]):
                 continue
 
             # random jitter