L’évaluation de la fonction ventriculaire gauche, avec une caméra à semi-conducteurs et un protocole faible dose
作者： M. Claudin , W. Djaballah , L. Imbert , N. Veran , S. Poussier
DOI: 10.1016/J.MEDNUC.2015.03.124
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摘要: Objectifs Les nouvelles gamma cameras a semi-conducteurs (CZT) ont permis d’ameliorer la qualite des images de perfusion myocardique (meilleures resolutions spatiale et en energie) diminuer les activites injectees durees d’acquisition (meilleure sensibilite detection). Le but cette etude etait d’evaluer parametres fonction ventriculaire gauche (VG) obtenus avec une camera CZT (la D-SPECT) un protocole faible dose temps d’enregistrement reduit, par comparaison aux resultats IRM cardiaque, examen reference dans indication. Patients methodes Nous avons inclus retrospectivement patients ayant beneficie d’une tomoscintigraphie au Sestamibi-99mTc sur D-SPECT jour tres (120 MBq lors du stress pour 75 kg poids corporel 360 MBq repos) cardiaque moins deux mois d’intervalle. La VG ete analysee repos D-SPECT, 8 phases cycle le logiciel QGS®. Resultats Soixante-dix-sept leur fraction d’ejection (FE) moyenne 45 ± 13 % IRM. En l’activite l’aire 527 ± 104 kcps, 3,5 ± 2,2 min totales 420 ± 185 MBq (doses effectives : 3,7 ± 1,6 mSv). Il y avait bonne correlation entre mesures FEVG (r = 0,88) volumes telediastoliques (VTD, r = 0,90) telesystoliques (VTS, r = 0,96), mais sous-estimation valeurs (en moyenne, 5 % valeur absolue −16 et −24 % relatives VTS VTD). Conclusions L’evaluation courte acquisition, s’avere bien correlee celle obtenue l’IRM chez memes patients, sous-estimations surtout volumes, conformement ce qui deja observe conventionnelles.
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