Minimizing the radiation dose of CT attenuation correction while improving image quality: The case for innovation

Visually estimated coronary artery calcium score improves SPECT-MPI risk stratification

“…Therefore, while VECACS is inherently subjective there seems to be reasonable accuracy and interobserver agreement. The radiation exposure from CTAC (<1mSv) is lower compared to dedicated CAC scanning which average ~ 1 mSv [37] , [38] . However, both are associated with relatively low radiation exposure compared to a 1-day myocardial rest stress study using Tc-99 m sestamibi (~9 mSv) [39] .…”

Absolute intensities of the γ-ray emissions originating from the electron capture decay of 153Gd

“…Gadolinium-153 is used in nuclear medicine as part of a line tracer in SPECT imaging [1][2][3], where attenuation corrections must be known on a patient-by-patient basis. Historically it has been used in bone absorptiometry [4][5][6], to study bone mineral density and to help diagnosis of osteoporosis.…”