削除できないgoogle広告

PlaggerのFilter::StripRSSAdでは以下のgoogle広告をStrip出来ない。複雑そうなので誰か対応お願いします。

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        <td><defanged-span> <br/></defanged-span></td>

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        <td><a href="http://imageads.googleadservices.com/pagead/imgclick/79:57613?pos=0" target=_blank class=blines3 title="Link outside of this blog">

    <img width="480" height="46" border="0" src="http://imageads.googleadservices.com/pagead/ads?output=png&url=http://japanese.engadget.com/2006/03/02/darpa-roboshark/&cuid=79:57613&format=480x46_aff&client=ca-pub-3546992251556849&hl=en&adsafe=high&color_bg=FFFFFF&color_border=FFFFFF&color_link=66666&color_text=333333&color_url=337788&color_line=337788" / ></a></td>

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        <td><div align="right"><a href="http://www.google.com/ads_by_google.html" target=_blank class=blines3 title="Link outside of this blog">Ads by Google</a></div></td>

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正規表現初心者には無理です。