Published in:
Open Access
01-03-2008 | Original Article
Variations in 123I-metaiodobenzylguanidine (MIBG) late heart mediastinal ratios in chronic heart failure: a need for standardisation and validation
Authors:
Hein J. Verberne, Jan B. A. Habraken, Berthe L. F. van Eck-Smit, Denis Agostini, Arnold F. Jacobson
Published in:
European Journal of Nuclear Medicine and Molecular Imaging
|
Issue 3/2008
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Abstract
Background
There is lack of validation and standardisation of acquisition parameters for myocardial 123I-metaiodobenzylguanidine (MIBG). This lack of standardisation hampers large scale implementation of 123I-MIBG parameters in the evaluation of patients with chronic heart failure (CHF).
Methods
In a retrospective multi-centre study 123I-MIBG planar scintigrams obtained on 290 CHF patients (82% male; 58% dilated cardiomyopathy; New York Heart Association [NYHA classification] > I) were reanalysed to determine the late heart-to-mediastinum ratio (H/M).
Results
There was a large variation in acquisition parameters. Multivariate forward stepwise regression showed that a significant proportion (31%, p < 0.001) of the variation in late H/M could be explained by a model containing patient-related variables and acquisition parameters. Left ventricular ejection fraction (p < 0.001), type of collimation (p < 0.001), acquisition duration (p = 0.001), NYHA class (p = 0.028) and age (p = 0.034) were independent predictors of late H/M.
Conclusions
Acquisitions parameters are independent contributors to the variation of semi-quantitative measurements of cardiac 123I-MIBG uptake. Improved standardisation of cardiac 123I-MIBG imaging parameters would contribute to increased clinical applicability for this procedure.