diff --git a/dap/algos/spiana.py b/dap/algos/spiana.py
index d68369f..fb535c2 100644
--- a/dap/algos/spiana.py
+++ b/dap/algos/spiana.py
@@ -1,18 +1,15 @@
 
 def calc_spi_analysis(results):
-    if "spi_limit" not in results:
-        return
+    for k in ("spi_limit", "roi_intensities_normalised"):
+        if k not in results:
+            return
 
     spi_limit = results["spi_limit"]
+    roi_intensities_normalised = results["roi_intensities_normalised"]
 
     if len(spi_limit) != 2:
         return
 
-    if "roi_intensities_normalised" not in results:
-        return
-
-    roi_intensities_normalised = results["roi_intensities_normalised"]
-
     if len(roi_intensities_normalised) < 2:
         return