advanced custom fields with imagemagick

Hi There

I’m using advanced custom fields in order to store and later display images in posts.
my code for displaying the image is :
<img src="<?php the_field('small_thumbnail',$post->ID)?>" alt="<?php print $post->post_title ?>" width='61' height='60' title="<?php print $post->post_title ?>"/>

while ‘small_thumbnail’ is the name of the custom field.

one problem I have is that all my images are 100X100 and I’m serving it as 61X60 which causes major performance issues (i must display about 200 images in a page therefore the major performance issues).

i tried using Imagemagick in order to serve scaled images but i cant figure out how to do so.

any help in this matter will be appreciated.