diff --git a/func/Module_resp_quality_label.py b/func/Module_resp_quality_label.py
index 5da029e..e2e0163 100644
--- a/func/Module_resp_quality_label.py
+++ b/func/Module_resp_quality_label.py
@@ -411,7 +411,7 @@ class MainWindow_resp_quality_label(QMainWindow):
                     artifact_type_seq = append(artifact_type_seq, 4)
                 if self.ui.checkBox_type5.isChecked():
                     artifact_type_seq = append(artifact_type_seq, 5)
-                length = Config["InputConfig"]["OrgBCGUseFreq"] * Params.RESP_QUALITY_LABEL_PARTS_TIME_SEC
+                length = end_OrgBCG - begin_OrgBCG
                 mask = array([arange(length), arange(length), arange(length), arange(length), arange(length), arange(length)])
                 mask = mask.astype(float64)
                 for i in artifact_type_seq: