CT scans for attenuation correction are typically performed at which energy level range?

CT scans used for attenuation correction in PET imaging are typically performed in the energy level range of 80-140 keV. This energy range is chosen because it effectively balances the trade-off between obtaining adequate image quality and minimizing the effects of noise and scatter.

The 80-140 keV range aligns well with the photon energy levels emitted during both PET imaging and conventional CT scans. It allows for the appropriate distinction of soft tissues and other materials within the body while effectively correcting for attenuation, which improves the accuracy of PET data interpretation.

Attenuation correction is critical in PET imaging since it ensures that the resulting images accurately reflect the distribution of radiotracer uptake by various tissues. Using this energy range helps achieve optimal contrast and detail in the CT images, which are essential for precise correction of the PET data.

In summary, the energy level range of 80-140 keV is advantageous for performing CT scans for attenuation correction in PET imaging, as it provides the necessary conditions for accurate and high-quality imaging results.