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[Image quality assessment of Step&Shoot overlap reconstruction (SSOR) for cardiac computed tomography (CT)]
Taiki Chono1, Tohru Hirano, Takeshi Inoue
1Sapporo Medical University Hospital.
Background:
Step&Shoot cardiac computed tomography (CT) provides the benefit of significant reduction in radiation dose compared to helical cardiac CT acquisitions. We think that a difference occurs in image quality by presence of overlap reconstruction (fractionated sentence, attempted to clarify).
Purpose:
We studied the utility of Step&Shoot overlap reconstruction (SSOR).
Methods:
We evaluated image quality of SSOR by comparing z-axis spatial resolution on various s in scanners that SSOR is possible and for those that are impossible.
Results:
SSOR indicated better z-axis spatial resolution and less variation over the field of view (FOV) (in z & x-y directions) as compared with Step&Shoot without overlap reconstruction (SS). In addition, SS showed inadequate image reproducibility due to aliasing error in z-direction (lack of sampling interval).
Conclusions:
SSOR would contribute to improvement of the image quality of Step&Shoot cardiac CT.
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