** **

**Exhibit 31.2**

**CERTIFICATIONS**

I, Diane J.Ryan, Chief Financial Officer of Implant Sciences Corporation, certify that:

1.   I have reviewed this 10-Q/A of ImplantSciences Corporation;

2.   Based on my knowledge, this report does notcontain any untrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of the circumstances underwhich such statements were made, not misleading with respect to the periodcovered by this report;

3.   Based on my knowledge, the financialstatements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operationsand cash flows of the small business issuer as of, and for, the periodspresented in this report;

4.   The small business issuer’s other certifyingofficer(s) and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the small business issuer andhave:

(a) Designed such disclosure controls and procedures, orcaused such disclosure controls and procedures to be designed under oursupervision, to ensure that material information relating to the small businessissuer, including its consolidated subsidiaries, is made known to us by otherswithin those entities, particularly during the period in which this report isbeing prepared;

(b) Designed such internal control over financial reporting,or caused such internal control over financial reporting to be designed underour supervision, to provide reasonable assurance regarding the reliability offinancial reporting and the preparation of financial statements for externalpurposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the small business issuer’sdisclosure controls and procedures and presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, as of theend of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the small businessissuer’s internal control over financial reporting that occurred during thesmall business issuer’s most recent fiscal quarter (the small business issuer’sfourth fiscal quarter in the case of an annual report) that has materiallyaffected, or is reasonably likely to materially affect, the small businessissuer’s internal control over financial reporting; and

5.  The small business issuer’s other certifyingofficer(s) and I have disclosed, based on our most recent evaluation ofinternal control over financial reporting, to the small business issuer’sauditors and the audit committee of the small business issuer’s board ofdirectors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses inthe design or operation of internal control over financial reporting which arereasonably likely to adversely affect the small business issuer’s ability torecord, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involvesmanagement or other employees who have a significant role in the small businessissuer’s internal control over financial reporting.
|        |   | Date:  July 31, 2006     |
|--------|--------|--------------------------|
|   |   |                     |
|   |   | /s/ Diane  J. Ryan       |
|   |   | Diane J.  Ryan           |
|   |   | Chief  Financial Officer |

 

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