diff --git a/docs/source/changelog.rst b/docs/source/changelog.rst
index a0fde51ed..2f2e28821 100644
--- a/docs/source/changelog.rst
+++ b/docs/source/changelog.rst
@@ -14,6 +14,13 @@ Winston-Lutz
   image inversion manually between the class instantiation and the ``.analyze()`` call, this
   change should not affect you. If you are, you may no longer need the inversion call.
 
+ACR
+^^^
+
+* The slice thickness given when calling ``ACRMRI.results()`` was reporting the nominal slice thickness
+  not the measured slice thickness. The output from ``ACRMRI.results_data()`` was correct however and has not changed.
+
+
 v 3.19.0
 --------
 
diff --git a/pylinac/acr.py b/pylinac/acr.py
index 10f18bc54..d0182a30a 100644
--- a/pylinac/acr.py
+++ b/pylinac/acr.py
@@ -1246,7 +1246,7 @@ def results(self, as_str: bool = True) -> str | tuple:
         string = (
             f" - {self._model} Results - ",
             f"Geometric Distortions: {self.geometric_distortion.distances()}",
-            f"Slice Thickness: {self.slice1.slice_thickness:2.2f}mm",
+            f"Slice Thickness: {self.slice1.measured_slice_thickness_mm:2.2f}mm",
             f"Slice 1 S/I Position shift: {self.slice1.slice_shift_mm:2.2f}mm",
             f"Slice 11 S/I Position shift: {self.slice11.slice_shift_mm:2.2f}mm",
             f"Uniformity PIU: {self.uniformity_module.percent_image_uniformity:2.2f}",
diff --git a/tests_basic/test_acr.py b/tests_basic/test_acr.py
index 98e0ed4ec..b15e5a0a4 100644
--- a/tests_basic/test_acr.py
+++ b/tests_basic/test_acr.py
@@ -316,6 +316,7 @@ class ACRMRMixin(CloudFileMixin):
     slice1_shift: float
     slice11_shift: float
     psg: float
+    results: list[str] = []
 
     @classmethod
     def setUpClass(cls):
@@ -356,6 +357,11 @@ def test_slice11_shift(self):
     def test_psg(self):
         self.assertAlmostEqual(self.mri.uniformity_module.psg, self.psg, delta=0.3)
 
+    def test_results(self):
+        results = self.mri.results()
+        for result in self.results:
+            self.assertIn(result, results)
+
 
 class ACRT1Single(ACRMRMixin, TestCase):
     file_name = "T1-Single.zip"
@@ -413,6 +419,7 @@ class ACRGE3T(ACRMRMixin, TestCase):
     slice1_shift = 0
     slice11_shift = 1.5
     psg = 0.3
+    results = ["5.50mm"]
 
 
 class ACRGE3TOffset(ACRGE3T):
@@ -439,6 +446,7 @@ class ACRGE3TRotated(ACRGE3T):
     """
 
     phantom_roll = -0.4
+    results = ["4.80mm"]  # induced rotation does change this a bit. See above.
 
     @classmethod
     def setUpClass(cls):