Exhibit 5.1

August 27, 2008



RadNet, Inc.
1510 Cotner Avenue
Los Angeles, CA 90025

                  Re:      Registration Statement on Form S-8
                           ----------------------------------

Ladies and Gentlemen:

         This opinion is being furnished in connection with the filing by
RadNet, Inc., a New York corporation (the "Company"), of a registration
statement on Form S-8 (the "Registration Statement") under the Securities Act of
1933, as amended, covering an aggregate of 2,975,000 shares (the "Shares") of
the Company's common stock, par value $0.0001 per share (the "Common Stock"),
1,500,000 which may be issued pursuant to the Company's 2006 Equity Incentive
Plan (the "2006 Plan"), comprised of: (i) up to 1,000,000 shares of Common Stock
that may be issued pursuant to outstanding stock options under the 2006 Plan;
and (ii) up to 500,000 shares of Common Stock reserved for issuance for future
awards under the 2006 Plan; and 1,475,000 shares of the Common Stock subject to
issuance by the Company upon the exercise of outstanding warrants (the
"Warrants").

         This opinion is being furnished in accordance with the requirements of
Item 8 of Form S-8 and Item 601(b)(5)(i) of Regulation S-K.

         In connection with this opinion, I have reviewed the Registration
Statement, the Company's charter documents, the proceedings taken by the Company
with respect to the authorization and adoption of the 2006 Plan, certificates of
government officials, the 2006 Plan, the Warrants, the stock records of the
Company including a summary report from the Company as of August 27, 2008 of
outstanding options to purchase the Company's Common Stock and stock reserved
for issuance upon the exercise of options to be granted in the future, and such
other documents, records, certificates, memoranda and other instruments as I
deem necessary as a basis for this opinion. With respect to the foregoing
documents, I have assumed the genuineness of all signatures, the authenticity of
all documents submitted to me as originals and the conformity to originals of
all documents submitted to me as certified or reproduced copies. I have also
assumed that either (i) the stock certificates to be issued to represent the
Shares (collectively, the "Stock Certificates") will conform to the specimen
common stock certificate submitted to me, and such Stock Certificates will be
duly executed by the Company and, as applicable, countersigned by the transfer
agent therefor in accordance with the New York Business Corporation Law and the
Company's Bylaws, or (ii) the Shares will be uncertificated in accordance with
the New York Business Corporation Law and the Company's Bylaws, and the transfer
agent therefor will register the purchaser thereof as the registered owner of
any uncertificated Shares on its stock transfer books and records. I have
further assumed that (i) shares currently reserved will remain available for the
issuance of the Shares, and (ii) neither the Company's charter documents nor any
of the proceedings relating to the 2006 Plan, or any of the option agreements or




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Warrants relating to the Shares, will be rescinded, amended or otherwise
modified prior to the issuance of the Shares. I have obtained from the officers
of the Company certificates as to certain factual matters and, insofar as this
opinion is based on matters of fact, I have relied on such certificates without
independent investigation.

         Based on the foregoing review, and in reliance thereon, I am of the
opinion that if, as and when the Shares are issued and sold by the Company in
accordance with the terms of the stock options or other agreements provided for
under the 2006 Plan or Warrants, as applicable, and payment in full of the
consideration therefor is received by the Company, the Shares will be validly
issued, fully paid and nonassessable.

         I consent to the filing of this opinion letter as Exhibit 5.1 to the
Registration Statement.

         I express no opinion as to matters governed by any laws other than the
New York Business Corporation Law. My opinion is expressly limited to the
matters set forth above, and I render no opinion, whether by implication or
otherwise, as to any other matters relating to the Company, the Shares, the 2006
Plan, the options, Warrants or other agreements related to the Shares, or the
Registration Statement.

                             Respectfully submitted,

                             /s/ Jeffrey L. Linden
                             ---------------------
                             Jeffrey L. Linden