Erschienen in:
01.08.2019 | Editorial
Rotating and stationary SPECT system patient motion myocardial perfusion artifacts
verfasst von:
Kenneth J. Nichols, PhD, Andrew Van Tosh, MD
Erschienen in:
Journal of Nuclear Cardiology
|
Ausgabe 4/2019
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Excerpt
Since the advent of gamma cameras to perform SPECT studies to assess myocardial perfusion,
1 it has been recognized that patient motion during data acquisition can result in artifacts that can compromise the accuracy of visual and quantitative scan interpretation.
2,
3 Originally, all SPECT systems consisted of one or more Anger detectors that rotated about the patient, so that abrupt patient motion in the caudal direction (corresponding to the “z” direction in the paper by Salvadori et al.
4) produced image data at those projections that are inconsistent with the image counts acquired at other projections. Reconstruction algorithms that are provided with data that are inconsistent from one projection to another often produce artifactual regional decreases in apparent myocardial perfusion that are misinterpreted as genuine perfusion defects.
2 …