FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Murdock Michael N   2. Issuer Name and Ticker or Trading Symbol RADIOLOGIX INC [RGX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior VP and CFO (Last) (First) (Middle) C/O RADIOLOGIX, INC., 3600, JP MORGAN CHASE TOWER, 2200 ROSS AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 11/15/2006 (Street) DALLAS, TX 75201 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Director Stock Option

$ 4.75

11/15/2006

D

200,000

(1)

(3)

Common Stock, par value $.0001

200,000

(3)

0

D

Director Stock Option

$ 1.7

11/15/2006

D

60,000

(2)

(4)

Common Stock, par value $.0001

60,000

(4)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Murdock Michael N C/O RADIOLOGIX, INC., 3600 JP MORGAN CHASE TOWER, 2200 ROSS AVENUE DALLAS, TX 75201			Senior VP and CFO

Signatures

/s/ Michael N. Murdock		11/17/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This option becomes exercisable for 1/60th of the option shares each month for 60 months.
(2)	The option becomes exercisable for 12,000 shares of the grant total on the first anniversary of the grant date. As to the remaining 48,000 shares, the option vests in equal successive monthly installments of 1,000 shares for 48 months following the first anniversary of the grant date.
(3)	Immediately prior to the effective time of the merger, pursuant to Agreement and Plan of Merger, dated as of July 6, 2006 (the "Merger Agreement"), by and among Radiologix, Inc. ("Radiologix") and Primedex Health Systems, Inc. ("Primedex"), these options were accelerated, vested, or otherwise awarded and subsequently cancelled without any exchange of Radiologix Common Stock for Primedex Common Stock or cash payment.
(4)	Immediately prior to the effective time of the merger, pursuant to the Merger Agreement, these options were accelerated, vested, or otherwise awarded and subsequently exchanged for a cash payment of $163,800, or $2.73 per share.

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