Abstract
For children, cardiac nuclear medicine imaging has not been widely used because of problems of physical motion, even in schoolchildren who require no sedation. In this study, rest–stress myocardial perfusion imaging (MPI) with technetium-99m-tetrofosmin (Tc-99m TF) was performed with the use of a Vac-Loc cushion, a patient immobilizer commonly used for radiotherapy, for immobilizing school-age patients. The immobilizer attenuated the gamma radiation by 6%. By visual assessment, physical motion-related artifacts were markedly improved in images acquired with the immobilizer, compared to those without. In the assessment of image reproducibility with the immobilizer, taking the reproducibility as 2.5Σ + 0.7σ, there were deviations of 4.45, 5.28, and 3.28 mm along the X-, Y-, and Z-axes, respectively, demonstrating a high reproducibility and a negligible rest–stress position error. It is suggested that for radiotherapy, the immobilizer could expand the versatility of MPI while allowing only minimal physical motion in children.
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Monzen, H., Ban, Y., Hirata, M. et al. Countermeasures against physical motion in schoolchildren requiring no sedation during rest and stress myocardial perfusion imaging with technetium-99m-tetrofosmin. Radiol Phys Technol 4, 19–23 (2011). https://doi.org/10.1007/s12194-010-0100-3
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DOI: https://doi.org/10.1007/s12194-010-0100-3