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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman"><strong>UNITED
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      AND EXCHANGE COMMISSION</strong></font></div>
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      D.C. 20549</strong></font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 16pt; FONT-FAMILY: Times New Roman"><strong>FORM
      8-K</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>CURRENT
      REPORT PURSUANT TO SECTION 13 OR 15(d)</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>OF
      THE SECURITIES EXCHANGE ACT OF 1934</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>March
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    <div>&#160;</div>
    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
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    <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 20pt; FONT-FAMILY: Times New Roman"><strong>NORTH
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      Sunburst Street, Chatsworth, California 91311</strong></font></div>
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    <div>&#160;</div>
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      Applicable</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Former
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions:</font></div>
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      communications pursuant to Rule 425 under the Securities Act (17 CFR
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      3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or
      Standard; </strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Transfer
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      16, 2006, North American Scientific, Inc. (the "Company") received a Nasdaq
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      Form
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              <td style="width: 36pt;">&#160;</td>
              <td align="left" style="width: 81pt;"><strong><u><font size="2">Exhibit
                No.</font></u></strong></td>
              <td align="left"><strong><u><font size="2">Description</font></u></strong></td>
            </tr>

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              <td align="left" style="width: 81pt;">&#160;</td>
              <td align="left">&#160;</td>
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              <td style="width: 36pt;">
              </td>
              <td align="left" style="width: 81pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibit
                99.1</font></td>
              <td align="left">
                <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                  release dated March 17, 2006.</font></div>
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      has
      duly caused this report to be signed on its behalf by the undersigned hereunto
      duly authorized.</font></div>
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            <td width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td width="49%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
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            <td colspan="2"><strong><font size="2">NORTH AMERICAN SCIENTIFIC,
              INC.</font></strong></td>
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            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;<br>&#160;</font></td>
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            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">Date:
              <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">March
              17, 2006</font></font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">By:&#160;&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">/s/L.
              Michael Cutrer</font></td>
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            <td align="left">
              <hr style="COLOR: black" align="left" noshade size="2" width="80%"><font size="2">Name:
</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">L.
              Michael Cutrer</font></td>
          </tr>
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            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">Title:
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              and Chief Executive Officer</font></font></td>
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                No.</u><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></font></strong></td>
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                99.1</font></td>
              <td align="left">
                <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                  release dated March 17, 2006.</font></div>
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{"company-data": {"conformed-name": "NORTH AMERICAN SCIENTIFIC INC", "cik": "0000949876", "assigned-sic": "3845", "irs-number": "510366422", "fiscal-year-end": "1031"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-26670", "film-number": "06696774"}, "business-address": {"street1": "20200 SUNBURST ST", "city": "CHATSWORTH", "state": "CA", "zip": "91311", "phone": "8187348600"}, "mail-address": {"street1": "20200 SUNBURST ST", "city": "CHATSWORTH", "state": "CA", "zip": "91311"}}
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
Washington,
      D.C. 20549
FORM
      8-K
CURRENT
      REPORT PURSUANT TO SECTION 13 OR 15(d)
OF
      THE SECURITIES EXCHANGE ACT OF 1934
March
      14, 2006
Date
      of
      Report (Date of earliest event reported)
NORTH
      AMERICAN SCIENTIFIC, INC.
(Exact
      name of registrant as specified in its charter)
Delaware
0-26670
51-0366422
(State
                or other jurisdiction of
(Commission
(I.R.S.
                Employer
incorporation)
File
                Number )
Identification
                No.)
20200
      Sunburst Street, Chatsworth, California 91311
(Address
      of principal executive offices) (Zip Code)
(818)
      734-8600
(Registrant's
      telephone number, including area code)
Not
      Applicable
(Former
      Name or Former Address, if Changed Since Last Report)
Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions:
o
Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425)
o
Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12)
o
Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b))
o
Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c))
Item
      3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or
      Standard;
Transfer
      of Listing.
On
      March
      16, 2006, North American Scientific, Inc. (the "Company") received a Nasdaq
      Staff Deficiency Letter dated March 14, 2006 indicating that, based on the
      Form
      10-Q for the period ended January 31, 2006, Nasdaq had determined that the
      Company is not in compliance with the minimum $10 million stockholders' equity
      requirement for continued listing on the Nasdaq National Market set forth in
      Marketplace Rule 4450(a)(3).
On
      March
      17, 2006, the Company issued a press release announcing that it had received
      the
      letter from Nasdaq. A copy of the Company's press release is attached as Exhibit
      99.1 and incorporated herein by reference.
Item
      9.01 Financial Statements and Exhibits.
(c)
Exhibits
Exhibit
                No.
Description
Exhibit
                99.1
Press
                  release dated March 17, 2006.
SIGNATURES
Pursuant
      to the requirements of the Securities Exchange Act of 1934, the Registrant
      has
      duly caused this report to be signed on its behalf by the undersigned hereunto
      duly authorized.
NORTH AMERICAN SCIENTIFIC,
              INC.
Date:
March
              17, 2006
By:
/s/L.
              Michael Cutrer
Name:
L.
              Michael Cutrer
Title:
President
              and Chief Executive Officer
EXHIBIT
      INDEX
Exhibit
                No.
Description
Exhibit
                99.1
Press
                  release dated March 17, 2006.