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J Nucl Cardiol. 2016 Aug;23(4):795-802. doi: 10.1007/s12350-016-0460-0. Epub 2016 Apr 12.

Traditional gamma cameras are preferred.

Author information

1
Icahn School of Medicine, Mt. Sinai St. Luke's and Mt. Sinai West Hospitals, New York, NY, USA. EDepuey@CHPNET.ORG.

Abstract

Although the new solid-state dedicated cardiac cameras provide excellent spatial and energy resolution and allow for markedly reduced SPECT acquisition times and/or injected radiopharmaceutical activity, they have some distinct disadvantages compared to traditional sodium iodide SPECT cameras. They are expensive. Attenuation correction is not available. Cardio-focused collimation, advantageous to increase depth-dependent resolution and myocardial count density, accentuates diaphragmatic attenuation and scatter from subdiaphragmatic structures. Although supplemental prone imaging is therefore routinely advised, many patients cannot tolerate it. Moreover, very large patients cannot be accommodated in the solid-state camera gantries. Since data are acquired simultaneously with an arc of solid-state detectors around the chest, no temporally dependent "rotating" projection images are obtained. Therefore, patient motion can be neither detected nor corrected. In contrast, traditional sodium iodide SPECT cameras provide rotating projection images to allow technologists and physicians to detect and correct patient motion and to accurately detect the position of soft tissue attenuators and to anticipate associated artifacts. Very large patients are easily accommodated. Low-dose x-ray attenuation correction is widely available. Also, relatively inexpensive low-count density software is provided by many vendors, allowing shorter SPECT acquisition times and reduced injected activity approaching that achievable with solid-state cameras.

KEYWORDS:

SPECT; attenuation correction; cadmium-zinc-telluride; sodium iodide; solid-state cameras

Comment in

PMID:
27072004
DOI:
10.1007/s12350-016-0460-0
[Indexed for MEDLINE]

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