title: how to combine the data from different image modalities like FLAIR, T2,T1 images into one image?
body: <p>I tried the following code to read images and which of the following method  is correct</p>
  
  <pre><code>FLAIR=imread('patient2_FLAIR.png');
  T1=imread('patient2_T1.png');
  T2=imread('patient2_T2.png');
  </code></pre>
  
  <p>Method 1</p>
  
  <pre><code>I=[FLAIR T1 T2]
  </code></pre>
  
  <p>Method 2</p>
  
  <pre><code>I=FLAIR+T1+T2
  </code></pre>
  
  <p>2.Do I need to apply intensity correction algorithm separately on these images and then combine</p>