From c4db03aad49ac4f81b90180162deed5baf0c3f03 Mon Sep 17 00:00:00 2001
From: yicheng <928596708@qq.com>
Date: Mon, 18 May 2026 12:32:43 +0800
Subject: [PATCH] fix: apply apodization when delay is zero in scan_line

The scan_line method only applied apodization weights when delay was
non-zero, silently skipping elements with delay==0. Added else branch
to apply apodization for all active elements regardless of delay.
---
 kwave/ktransducer.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kwave/ktransducer.py b/kwave/ktransducer.py
index 1f27ce0d6..acbad42f9 100644
--- a/kwave/ktransducer.py
+++ b/kwave/ktransducer.py
@@ -715,6 +715,9 @@ def scan_line(self, sensor_data):
                     )
                     * apodization[element_index]
                 )
+            else:
+                # No delay — still apply apodization weight
+                sensor_data[element_index, :] *= apodization[element_index]
 
         # Form the line summing across the elements
         line = np.sum(sensor_data, axis=0)