Document Detail


Attenuation-corrected 99mTc-MIBI SPECT in overweight patients with chronic ischaemic dysfunction: a comparison to NH3 PET and implications for the diagnosis of myocardial viability.
MedLine Citation:
PMID:  16969265     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: We determined the value of attenuation correction (AC) of myocardial perfusion estimation with (99m)Tc-MIBI SPECT in overweight patients by comparison of uncorrected (filtered back-projection (FBP) and corrected (an iterative algorithm with a measured attenuation coefficients map (FL-AC)) (99m)Tc-MIBI relative uptake to perfusion data obtained in the same patients with NH3 PET. In addition, the impact of attenuation correction for the assessment of myocardial viability with (99m)Tc-MIBI SPECT was determined using FDG PET as the reference method. METHODS: Thirty consecutive overweight patients (BMI=28+/-4) with left ventricular dysfunction underwent a resting (99m)Tc-MIBI SPECT and a PET study (NH3 and FDG). (99m)Tc-MIBI SPECT scans were reconstructed without attenuation correction (FBP) and with attenuation correction (FL-AC). The left ventricle was divided into 16 segments, in which the relative uptake was quantified using circumferential profiles. A relative uptake > or = 60% was considered consistent with viable myocardium for FDG and MIBI. RESULTS: The absolute difference between (99m)Tc-MIBI SPECT and NH3 PET uptakes was less pronounced in the inferior (12+/-10% vs. 17+/-12%, P<0.001), anteroseptal (12+/-11% vs. 16+/-12%, P=0.009) and septal (15+/-12% vs. 18+/-14%, P=0.003) regions (FL-AC vs. FBP, respectively). The sensitivity of MIBI for diagnosing myocardial viability increased from 83 to 100% (P=0.034), without loss in specificity. CONCLUSION: Attenuation correction improves myocardial perfusion estimation by (99m)Tc-MIBI SPECT in the inferior, anteroseptal and septal regions and increases its sensitivity for the diagnosis of myocardial viability.
Authors:
Véronique Roelants; Xavier Bernard; Stephan Walrand; Anne Bol; Ann Coppens; Jacques Jamart; Jacques Melin; Jean-Louis Vanoverschelde
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Nuclear medicine communications     Volume:  27     ISSN:  0143-3636     ISO Abbreviation:  Nucl Med Commun     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-13     Completed Date:  2007-01-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8201017     Medline TA:  Nucl Med Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  815-21     Citation Subset:  IM    
Affiliation:
Department of Nuclear Medicine, Cliniques Universitaires St-Luc, Université Catholique de Louvain, Brussels, Belgium. veronique.roelants@imre.ucl.ac.be
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MeSH Terms
Descriptor/Qualifier:
Algorithms
Coronary Circulation
Echocardiography / methods
Humans
Image Processing, Computer-Assisted / methods
Ischemia / metabolism,  pathology*
Myocardium / pathology
Overweight*
Positron-Emission Tomography / methods*
Radiopharmaceuticals / diagnostic use
Sensitivity and Specificity
Technetium Tc 99m Sestamibi / diagnostic use*
Tomography, Emission-Computed, Single-Photon / methods
Ventricular Dysfunction, Left
Chemical
Reg. No./Substance:
0/Radiopharmaceuticals; 109581-73-9/Technetium Tc 99m Sestamibi

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