Customizing header alignment with image

When I add an image to page header, the text is aligned on top of the header table.

Have tried following, without success:
  <xsl:attribute-set name="header.table.properties">
    <xsl:attribute name="table-layout">fixed</xsl:attribute>
    <xsl:attribute name="background-color">yellow</xsl:attribute>
    <xsl:attribute name="vertical-align">bottom</xsl:attribute>
  </xsl:attribute-set>

As you can see in attached image, the chapter title is on top of table. Would like to align with base of image (shown with red line).



Ideas?

~spr