Original articleClinical results of a novel wide beam reconstruction method for shortening scan time of Tc-99m cardiac SPECT perfusion studies
Section snippets
WBR Method
The WBR technology is an iterative reconstruction method that simultaneously addresses RR and noise reduction to maintain or improve image quality in studies with substantially fewer photon counts. This technology includes an accurate model of the physics and geometry of the emission and detection process. More specifically, this modeling includes the following factors.
Hot and Cold Sphere Phantom Studies
Two central transverse slices of the reconstructed hot and cold sphere images, for both OSEM and WBR, are shown in Figure 1. The CR values measured on both OSEM and WBR of each of the phantoms are shown in Table 2. Table 3 shows a comparison of background CV values.
CR values for WBR hot sphere reconstruction are, on average, larger by 82% than for OSEM. In the cold sphere phantom, CR values for WBR reconstruction are, on average, larger by 42% than for OSEM. Of particular interest are the CR
Discussion
Despite the tremendous growth of nuclear cardiology in the last several years, particularly after the introduction of Tc-99m–labeled perfusion agents, little has been done to impact the efficiency as well of myocardial perfusion imaging. Meanwhile, competing noninvasive imaging modalities that are used for the evaluation of patients with suspected or known ischemic heart disease, such as magnetic resonance imaging, computed tomography, and contrast echocardiography, have undergone major
Acknowledgment
The authors have indicated they have no financial conflicts of interest.
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