(preferred). Estimated Shall be defined so that it conforms to the outline of the head as Attenuation Map Technologist closely as possible. (if used) Correction: Scatter correction be used when possible. TEW or equivalent Technologist Scatter is recommended. Shall be reconstructed in such a way as to compensate for attenuation and scatter. Optimal reconstruction depends on the analysis method used (see Section 3.10). Whole striatum VOI method: the reconstruction should be implemented to reduce partial volume effects, e.g., using CDR and partial volume compensation. Controlling voxel-level noise is less important, so post-reconstruction filtering is not recommended, Reconstructed Technologist though may be used for visual interpretation. image Small VOI method: the reconstruction should be implemented to control the effects of voxel-level artifacts such as noise spikes and ringing, including the use of 3-dimensional low-pass filtering (with 8 10 mm FWHM). – The reconstructed image should have sufficient spatial resolution to allow reliable independent estimates of the SBR in the Caudate and Putamen. Stored Camera Reconstructed images should be stored in such a way as to Reconstructed Manufacturer preserve the image dynamic range. Image 3.8. Image QA/QC This activity describes criteria and evaluations of the images that are necessary to reliably meet the Profile Claim. 3.8.1 Many factors can adversely influence image quality, and degrade quantification. Some of these problems can be inferred from a qualitative assessment of the images by an experienced operator, such as a nuclear radiologist. For example, while advanced Parkinson’s disease can produce globally decreased ioflupane uptake in all structures of the basal ganglia, these findings are more likely to represent an infiltrated dose in patients who are making their initial presentations.
(preferred). Estimated Attenuation Map (if used) Technologist Shall be defined so that it conforms to the outline of the head as closely as possible. Correction: Scatter Technologist Scatter correction be used when possible. TEW or equivalent is recommended. Reconstructed image Technologist Shall be reconstructed in such a way as to compensate for attenuation and scatter. Optimal reconstruction depends on the analysis method used (see Section 3.10). Whole striatum VOI method: the reconstruction should be implemented to reduce partial volume effects, e.g., using CDR and partial volume compensation. Controlling voxel-level noise is less important, so post-reconstruction filtering is not recommended, though may be used for visual interpretation. Small VOI method: the reconstruction should be implemented to control the effects of voxel-level artifacts such as noise spikes and ringing, including the use of 3-dimensional low-pass filtering (with 8 – 10 mm FWHM). The reconstructed image should have sufficient spatial resolution to allow reliable independent estimates of the SBR in the Caudate and Putamen. Stored Reconstructed Image Camera Manufacturer Reconstructed images should be stored in such a way as to preserve the image dynamic range. 3.8. Image QA/QC This activity describes criteria and evaluations of the images that are necessary to reliably meet the Profile Claim. 3.8.1 Many factors can adversely influence image quality, and degrade quantification. Some of these problems can be inferred from a qualitative assessment of the images by an experienced operator, such as a nuclear radiologist. For example, while advanced Parkinson’s disease can produce globally decreased ioflupane uptake in all structures of the basal ganglia, these findings are more likely to represent an infiltrated dose in patients who are making their initial presentations.