Disable thumbnails inside post

Is it possible to remove thumbnail inside a post?

I want my front page to show the thumbnails, but when I go into the posts, I want the thumbnail to be removed. How to do this? Thanks.

Hi!
To get rid of your featured image inside an actual post you have to replace code:

if(has_post_thumbnail())  {
                    ?><?php if (!is_single()) { ?><a href="<?php the_permalink(); ?>" title="<?php printf( $SMTheme->_( 'permalink' ), the_title_attribute( 'echo=0' ) ); ?>"><?php the_post_thumbnail(
                        array($SMTheme->get( 'layout', 'imgwidth' ), $SMTheme->get( 'layout', 'imgheight' )),
                        array("class" => $SMTheme->get( 'layout','imgpos' ) . " featured_image")
                    ); ?></a><?php } else { ?>
                        <?php the_post_thumbnail(
                        array(278, 173),
                        array("class" => $SMTheme->get( 'layout','imgpos' ) . " featured_image")
                    ); ?>
                    <?php }
                }

with

if(has_post_thumbnail())  {
                    ?><?php if (!is_single()) { ?><a href="<?php the_permalink(); ?>" title="<?php printf( $SMTheme->_( 'permalink' ), the_title_attribute( 'echo=0' ) ); ?>"><?php the_post_thumbnail(
                        array($SMTheme->get( 'layout', 'imgwidth' ), $SMTheme->get( 'layout', 'imgheight' )),
                        array("class" => $SMTheme->get( 'layout','imgpos' ) . " featured_image")
                    ); ?></a><?php }
                }

in the file theloop.php of the theme.