diff --git a/script/device/Image.py b/script/device/Image.py
index a4b5af6..8083297 100644
--- a/script/device/Image.py
+++ b/script/device/Image.py
@@ -104,6 +104,14 @@ def wait_for_files(filepaths):
             time.sleep(wait_time)            
 
 
+def wait_for_file_size(filepath, size):
+    wait_time = 0.01
+    filepath = os.path.abspath(filepath)
+    # If the file doesn't exist, wait wait_time seconds and try again
+    # until it's found.
+    while not os.path.exists(filepath) and os.path.getsize(filepath) < size:
+        time.sleep(wait_time)
+
 
 class Image(DeviceBase, Readable):
     def __init__(self, name, pixel):
@@ -124,7 +132,8 @@ class Image(DeviceBase, Readable):
             filename = self.pixel.get_image_filename()
 
         print "Waiting image file: " + filename 
-        wait_for_files([filename])
+        size = 4 * self.pixel.PIX_XDIM, self.pixel.PIX_YDIM
+        wait_for_file_size(filename, size)
         
         
         threshold1 = self.pixel.threshold1
@@ -139,7 +148,7 @@ class Image(DeviceBase, Readable):
         tmp_file = self.pixel.image_root_folder + "tmp/spec_image_info.dat"        
         copyfile(filename, tmp_file)
 
-        try:
+        try:            
             ret = img_get_int(tmp_file, threshold1, threshold2, threshold3, threshold4, \
                           self.pixel.image_header_length, self.pixel.PIX_XDIM, self.pixel.PIX_YDIM,self.pixel.PIX_COLOR_DEPTH, \
                           roi[0], roi[1], roi[2], roi[3], bkroi[0], bkroi[1], bkroi[2], bkroi[3])