Performance problem with image datatype

There are 1,500,000 rows in a table. The data type of a column is Image data. It costs one and half hours to query all the images data. This issue was reported by a important customer. 

How to improve the performance?

See the following link about Image data:

http://ask.sqlservercentral.com/questions/17773/performance-problem-with-image-datatype.html

Thanks

Scott