diff --git a/api/src/Page/DC.php b/api/src/Page/DC.php
index 4ab4da7d2..07924aae6 100644
--- a/api/src/Page/DC.php
+++ b/api/src/Page/DC.php
@@ -483,8 +483,8 @@ function _data_collections($single = null)
                     dc.phaseplate,
                     ses.beamlinename as bl,
                     dc.blsubsampleid,
-                    d.numberofpixelsx as detectornumberofpixelsx,
-                    d.numberofpixelsy as detectornumberofpixelsy,
+                    IF(dc.detectorMode = 'ROI', d.numberofroipixelsx, d.numberofpixelsx) as detectornumberofpixelsx,
+                    IF(dc.detectorMode = 'ROI', d.numberofroipixelsy, d.numberofpixelsy) as detectornumberofpixelsy,
                     ses.archived,
                     ses.purgedProcessedData,
                     IFNULL(dc.rotationaxis, 'Omega') as rotationaxis,
@@ -621,8 +621,8 @@ function _data_collections($single = null)
                     max(dc.phaseplate) as phaseplate,
                     max(ses.beamlinename) as bl,
                     max(dc.blsubsampleid) as blsubsampleid,
-                    max(d.numberofpixelsx) as detectornumberofpixelsx,
-                    max(d.numberofpixelsy) as detectornumberofpixelsy,
+                    IF(dc.detectorMode = 'ROI', max(d.numberofroipixelsx), max(d.numberofpixelsx)) as detectornumberofpixelsx,
+                    IF(dc.detectorMode = 'ROI', max(d.numberofroipixelsy), max(d.numberofpixelsy)) as detectornumberofpixelsy,
                     max(ses.archived) as archived,
                     max(ses.purgedProcessedData) as purgedProcessedData,
                     IFNULL(max(dc.rotationaxis), 'Omega') as rotationaxis,