You rss doesn't have the url of the normal image, but yes you can get it from parsing the details page which is link
in your rss feed.
Open the link and try to find how can you get the <img src=>
tag for the normal image in the link
url.
You can simple use NSString substring
function to get the src from the tag.. In your case as I seen the Normal Image
can be extract from the trend <div id="ie_dottop">
the image tag after this div
tag contains the normal image url, try to read the html page and parse, you will be able to get.
All the Best.