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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 PA6A/CFOwB5Dtbt8WeHnQXrSP99Lap77M5rarEZPgYFHuvPQ6MAFLeLeH98xsJPD
 dzfi4Yfu/5iRRdcqnHb9+A==

<SEC-DOCUMENT>0001181431-06-035764.txt : 20060608
<SEC-HEADER>0001181431-06-035764.hdr.sgml : 20060608
<ACCEPTANCE-DATETIME>20060608135858
ACCESSION NUMBER:		0001181431-06-035764
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060607
FILED AS OF DATE:		20060608
DATE AS OF CHANGE:		20060608

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUGAN THOMAS J
		CENTRAL INDEX KEY:			0001227576

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30959
		FILM NUMBER:		06893616

	MAIL ADDRESS:	
		STREET 1:		C/O DATASCOPE CORP
		STREET 2:		14 PHILIPS PARKWAY
		CITY:			MONTVALE
		STATE:			NJ
		ZIP:			07645

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RITA MEDICAL SYSTEMS INC
		CENTRAL INDEX KEY:			0001056421
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				943199149
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		967 N SHORELINE BLVD
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94013
		BUSINESS PHONE:		6503858500

	MAIL ADDRESS:	
		STREET 1:		967 NORTH SHORELINE BLVD
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd120984.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-06-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001056421</issuerCik>
        <issuerName>RITA MEDICAL SYSTEMS INC</issuerName>
        <issuerTradingSymbol>RITA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001227576</rptOwnerCik>
            <rptOwnerName>DUGAN THOMAS J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>46421 LANDING PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>FREMONT</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94538</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option to purchase, right to buy</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.81</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-06-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25750</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>3.81</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-06-07</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-06-07</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>25750</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Option shall vest and become exercisable, assuming continued service on the Board throughout such period, as of the earlier of (a) the one year anniversary of the date of the option and (b) the date immediately preceding the date of the annual meeting of the Company's stockholders for the year following the year of the grant of the option.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Richard De Young, attorney in fact</signatureName>
        <signatureDate>2006-06-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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