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Journal of Nuclear Cardiology

, Volume 24, Issue 4, pp 1361–1369 | Cite as

Optimization of a simultaneous dual-isotope 201Tl/123I-MIBG myocardial SPECT imaging protocol with a CZT camera for trigger zone assessment after myocardial infarction for routine clinical settings: Are delayed acquisition and scatter correction necessary?

  • Emmanuel D’estanqueEmail author
  • Christophe Hedon
  • Benoît Lattuca
  • Aurélie Bourdon
  • Meriem Benkiran
  • Aurélie Verd
  • François Roubille
  • Denis Mariano-Goulart
Original Article

Abstract

Background

Dual-isotope 201Tl/123I-MIBG SPECT can assess trigger zones (dysfunctions in the autonomic nervous system located in areas of viable myocardium) that are substrate for ventricular arrhythmias after STEMI. This study evaluated the necessity of delayed acquisition and scatter correction for dual-isotope 201Tl/123I-MIBG SPECT studies with a CZT camera to identify trigger zones after revascularization in patients with STEMI in routine clinical settings.

Methods

Sixty-nine patients were prospectively enrolled after revascularization to undergo 201Tl/123I-MIBG SPECT using a CZT camera (Discovery NM 530c, GE). The first acquisition was a single thallium study (before MIBG administration); the second and the third were early and late dual-isotope studies. We compared the scatter-uncorrected and scatter-corrected (TEW method) thallium studies with the results of magnetic resonance imaging or transthoracic echography (reference standard) to diagnose myocardial necrosis.

Results

Summed rest scores (SRS) were significantly higher in the delayed MIBG studies than the early MIBG studies. SRS and necrosis surface were significantly higher in the delayed thallium studies with scatter correction than without scatter correction, leading to less trigger zone diagnosis for the scatter-corrected studies. Compared with the scatter-uncorrected studies, the late thallium scatter-corrected studies provided the best diagnostic values for myocardial necrosis assessment.

Conclusions

Delayed acquisitions and scatter-corrected dual-isotope 201Tl/123I-MIBG SPECT acquisitions provide an improved evaluation of trigger zones in routine clinical settings after revascularization for STEMI.

Keywords

Trigger zone MIBG myocardial infarction scatter correction cardiac SPECT 

Abbreviations

CZT

Cadmium zinc telluride

H/M

Heart to mediastinum

HF

Heart failure

MI

Myocardial infarction

MIBG

Methyliodobenzylguanidine

MMA

Maximal myocardial activity

MRI

Magnetic resonance imaging

MSA

Mean segmental activity

SCD

Sudden cardiac death

SPECT

Single-photon emission computed tomography

SRS

Summed rest score

STEMI

ST-elevation myocardial infarction

TEW

Triple energy window

TSS

Trigger summed score

TTE

Transthoracic echography

VA

Ventricular arrhythmia

Notes

Disclosures

The authors have indicated that they have no financial conflict of interest.

Supplementary material

12350_2016_524_MOESM1_ESM.pptx (3.1 mb)
Supplementary material 1 (PPTX 1353 kb)

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Copyright information

© American Society of Nuclear Cardiology 2016

Authors and Affiliations

  • Emmanuel D’estanque
    • 1
    Email author
  • Christophe Hedon
    • 2
    • 3
  • Benoît Lattuca
    • 2
  • Aurélie Bourdon
    • 1
  • Meriem Benkiran
    • 1
  • Aurélie Verd
    • 1
  • François Roubille
    • 2
    • 3
  • Denis Mariano-Goulart
    • 1
    • 3
  1. 1.Nuclear Medicine DepartmentMontpellier University HospitalMontpellier Cedex 5France
  2. 2.Cardiology DepartmentMontpellier University HospitalMontpellierFrance
  3. 3.U1046 INSERM, UMR9214 CNRSMontpellier University HospitalMontpellierFrance

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