New SPECT technique might reduce MPI dose

A preliminary phantom study suggests general-purpose collimators with resolution recovery potentially can reduce dose in SPECT myocardial perfusion imaging (MPI) scans and maintain image quality, according to a study published online on 25 January in the Journal of Nuclear Cardiology.

Researchers from Central Manchester University Hospitals in the U.K. say this imaging technique also could offer a more efficient and sustainable approach to delivering myocardial perfusion imaging.

In this study, images of a cardiac torso phantom with inferior and anterior wall defects were acquired on two SPECT cameras (Infinia, GE Healthcare, and Symbia T6, Siemens Healthcare) using both high-resolution and general-purpose collimators. By using the advanced image processing technique of resolution recovery, researchers created images using the alternative collimator, which were of similar or better quality than the standard procedure.

The approach also reduced the amount of radioactive tracer required and could reduce patient radiation dose by 35% to 40%.

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