Search for: [Abstract = "icacy of GEP\-NET in localization of primary tumors and their metastases. Currently SRS is important study in taking a decision about use of PRRT. This therapy model is considered as the most effective treatment in inoperable and diffuse GEP\-NET. Optimization of the method of reconstruction of the SPECT images is necessary to increase sensitivity and specificity of the SRS. Purpose\: Optimization of the iterative OSEM method of reconstruction of SPECT images in patients with GEP\-NET and comparison of two reconstruction techniques\: FBP versus the optimized OSEM Flash 3D™ algorithm. Materials and method\: The results of 76 random patients \(42F and 34M\) with confirmed GEP\-NET were analyzed. GEP\-NET was confirmed in histopathological examination and the tumors were localized with use of the CT, MRI or endoscopy studies. 197 lesions \(108\-localized in the liver and 89\-with out\-liver localization\) were analyzed for the crucial sets of reconstruction parameters. SPECT\/CT fusion was used to verify each lesion described in SPECT images. The lesions were divided into two groups because of localization\: group I– lesions localized in the liver and group II–with out\-liver localization \(in abdomen\). The SPECT images were analyzed in qualitative and quantitative assessment. The qualitative estimate was the primary coefficient and influence on the consecutive steps in optimi"]

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