Analysis of gated SPECT myocardial perfusion imaging using dynamic heart phantoms

  • Eduardo Esteban Rodríguez Universidad Nacional de General Sarmiento
  • María Victoria Bortule Universidad Nacional de General Sarmiento e Instituto Balseiro
  • Pablo Armando Calla Universidad Nacional de General Sarmiento
  • Pablo Javier Sanabria Instituto de Oncología Ángel H. Roffo
  • Natalia Aramayo

Abstract

In this paper we present results of dynamic heart phantoms images obtained with a gated-SPECT system, following the myocardial perfusion acquisition protocol with 99mTc. Two models of phantoms were used: one with symmetry of revolution around the long cardiac axis and another with anatomical shape. Both dynamic phantoms reproduce with realism cycles of distension-contraction and the change of ventricular volume, achieved with a mechatronic system. Characterization of phantoms in the laboratory and validation with SPECT are presented. The obtained tomography images were analyzed using different reconstruction methods and processing and quantification software. Results show, for the two types of phantoms, that the used analysis programs underestimate the volume of the ventricular cavity and overestimate the ejection fraction.

Author Biographies

Eduardo Esteban Rodríguez, Universidad Nacional de General Sarmiento
Área Ciencias y Tecnologías Básicas, Instituto de Industria, Universidad Nacional de General Sarmiento (Los Polvorines, Buenos Aires)
María Victoria Bortule, Universidad Nacional de General Sarmiento e Instituto Balseiro
Área Ciencias y Tecnologías Básicas, Instituto de Industria, Universidad Nacional de General Sarmiento (Los Polvorines, Buenos Aires)
Pablo Armando Calla, Universidad Nacional de General Sarmiento
Área Ciencias y Tecnologías Básicas, Instituto de Industria, Universidad Nacional de General Sarmiento (Los Polvorines, Buenos Aires)
Pablo Javier Sanabria, Instituto de Oncología Ángel H. Roffo
Servicio de Medicina Nuclear, Instituto de Oncología Ángel H. Roffo, Universidad de Buenos y Comisión Nacional de Energía Atómica (Ciudad Autónoma de Buenos Aires)
Natalia Aramayo
Servicio de Medicina Nuclear, Instituto de Oncología Ángel H. Roffo, Universidad de Buenos y Comisión Nacional de Energía Atómica (Ciudad Autónoma de Buenos Aires)
Published
2020-04-23
Section
Scientific articles