Thoracic Key

Key points • Artifactual perfusion defects may develop in the AC image if the CT image is not correctly registered with the SPECT image prior to reconstruction. Therefore, the CT…

Key points • Improvements in reconstruction software and dedicated cardiac camera design now allow for efficient ultrafast MPI acquisition. Some of the acquisition time reduction may be traded off for…

Key points • Assessment of myocardial viability is helpful in patients with severe CAD and severe LV dysfunction. • Every living patient has viable myocardium; the question is not whether…

Key points • I-123 mIBG can be used to image adrenergic receptors in the heart using conventional planar or SPECT imaging. • I-123 mIBG H/M measured from planar or SPECT…

Key points • History, physical examination, 12-lead ECG, and serum markers are useful, but not sufficient, for diagnosing ACS and for risk stratification in the ED. • MPI can be…

Key points • Correct energy window position of the pulse height analyzer should be verified for each detector prior to SPECT acquisition. • Maximal myocardial counts should be identified (usually…

Key points • Gated SPECT perfusion imaging is useful in differentiating ischemic cardiomyopathy from dilated cardiomyopathy. • Gated SPECT perfusion imaging and RNA are useful in differentiating patients with HF…

Key points • Current guidelines do not recommend routine screening with stress MPI in asymptomatic individuals. Obviously, some exceptions are expected. • Although patients with DM are considered at high…

Key points • The first fundamental assumption of myocardial perfusion SPECT imaging is that the radiotracer is distributed in the myocardium directly proportional to the blood flow at the time…

Key points • Exercise (treadmill or bicycle) is the preferred stress modality in patients who can exercise and achieve adequate exercise endpoints. • Vasodilator stress is reserved for patients who…