How do I add image header to email

I would like to brand the emails some. I can't seem to get the right code to embed an image in the header where "New Blog Post" is (in the "new blog" email template)

<tr>	

<td style="text-align: center;padding: 40px 10px 0;">

		<div style="margin-bottom:15px;">

			<div style="font-family:Arial;font-size:32px;font-weight:normal;color:#333;display:block; margin: 4px 0">

				<?php echo JText::_( 'COM_EASYBLOG_NOTIFICATION_NEW_BLOG_POST' ); ?>

			</div>

How do I embed an image either behind or instead of this?