Image rendering in IE9 is blurry

Hi all,

I wonder why does IE's image rendering is very bad? With the same html code, Chrome seems to render the image well more better than IE. The image is a vector image, with the height of 507x117, I re-size it to the height of 40 using html height something like this <img src="logo.png" height="40"/>. The image looks like a pixcelate image in IE, however, when in full size mode it is a vector image. Is there a work around for this problem?

Thanks,

Sam.