EXHIBIT 32.2

Certification Pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and U.S.C. Section 1350

I, Alan Fuhrman, Senior Vice President and Chief Financial Officer of Sonus Pharmaceuticals, Inc. (the “Company”), certify, pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, that:

(1)                                  the Quarterly Report on Form 10-Q of the Company for the quarterly period ended March 31, 2007 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 780(d)); and

(2)                                  the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:  May 9, 2007
	/s/ Alan Fuhrman
	Alan Fuhrman
	Senior Vice President and Chief Financial Officer