Hybrid SPECT/cardiac-gated first-pass perfusion CT: locating transplanted cells relative to infarcted myocardial targets.
Contrast Media Mol Imaging
; 7(1): 76-84, 2012.
Article
em En
| MEDLINE
| ID: mdl-22344883
ABSTRACT
PURPOSE:
A challenge with cardiac cell therapy is determining the location of cells relative to infarct tissue. As cells are viable following ¹¹¹In-labeling, and first-pass CT imaging can identify regions of myocardial infarction, we evaluated the feasibility of a SPECT/CT system to localize cells relative to infarcted myocardium in a canine model.METHODS:
Ten canines underwent surgical ligation of the left-anterior-descending artery and endothelial progenitor cells labeled with ¹¹¹In-tropolone were transplanted endocardially or epicardially. SPECT/CT was performed on day of transplantation, 4 and 10 days post-transplantation. For each imaging session first-pass perfusion CT was performed to delineate the area of reduced perfusion. SPECT and first-pass CT images were fused and evaluated. Contrast-to-noise ratios (CNR) were calculated for ¹¹¹In-SPECT images to evaluate cell detection.RESULTS:
The zone of reduced perfusion was well delineated on first-pass perfusion CT in all canines. The ¹¹¹In signal was visualized within this zone in all cases. Analysis of the CNRs suggests that cells may be followed for 11 effective half-lives using the images from first-pass perfusion CT to provide the anatomic landmarks.CONCLUSION:
In the setting of an acute myocardial infarction SPECT/[first-pass perfusion CT] is an effective hybrid platform for the localization of cells in relation to the area of reduced blood flow.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Tropolona
/
Radioisótopos de Índio
/
Imageamento por Ressonância Magnética
/
Transplante de Células-Tronco
/
Tomografia Computadorizada por Emissão de Fóton Único de Sincronização Cardíaca
/
Imagem de Perfusão do Miocárdio
/
Rastreamento de Células
/
Infarto do Miocárdio
Limite:
Animals
Idioma:
En
Revista:
Contrast Media Mol Imaging
Assunto da revista:
DIAGNOSTICO POR IMAGEM
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Canadá