The purpose: the aim of this study was performance of phantom researches for verification of techniques of definition of perfusion defects size and perfusion defects severity. Study of influence of border of norm and pathology level on reliability of calculated results and reception of the equations linear regression for exact account of these parameters. Material and methods: SPECT was carried out on the original phantom of heart with various size, severity and localization of defects perfuzii. The account of perfusion defects size (PDS), level of nuclide accumulation in them (LA) and integrated index of perfusion defect (IIDP), parameter, connecting two these, was carried out at levels of borders of norm and pathology from 55 up to 75%. Results: it was shown, that SPECT estimation of PDS should be calculated it turn out at installation of 'norm' and 'pathology' border at a level 75%. It was established, that for definition of LA it is most expedient to consider minimal percent of accumulation of the indicator and PDS, calculated at installation of border of 'norm' and 'pathology' at a level 75%. For authentic definition IIDP the linear regression equation is recommended at installation of border 'norms' and of a 'pathology' also at a level 75%. The conclusion: the SPECT techniques of definition PDS, AL and IIDP with use of the linear regression equation allow about high accuracy to expect the these parameters.
|Журнал||Meditsinskaya Radiologiya (Medical Radiology)|
|Состояние||Опубликовано - сен 1998|
ASJC Scopus subject areas
- Nuclear Energy and Engineering