The　effect　of　the　scattered　photons　was　taken　into　account　and　the　iterative　deduction　of　the　scattered　photons　was　used　to　amend　the　scattering　effect　in　the　image　restoration.　The　customization　of　AutoCAD　was　performed　to　achieve　the　three-dimensional　arbitrary　geometry　pretreatment.　On　the　basis　of　the　model,　IPOR　(Iterative　Procedure　for　image　restORation　code)　was　developed.　Comparison　of　the　results　of　IPOR　code　with　those　of　MCNP　shows　that　the　scattering　correction　method　of　IPOR　outperforms　the　MC　method　in　terms　of　much　less　computing　time　by　more　than　two　orders　of　magnitude　with　comparable　precision.　Furthermore,　IPOR　code　has　a　very　high　computational　efficiency,　and　it　is　more　accurate　compared　with　the　direct　solution　without　scattering　correction.