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Results: 8

1.
Figure 8

Figure 8. From: 4D reconstruction for low-dose cardiac gated SPECT.

Normalized cross-sectional intensity profiles of different methods at half dose. For comparison, the profiles of ideal and standard reconstructions are also shown. The insertion shows where the intensity profile was calculated.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
2.
Figure 1

Figure 1. From: 4D reconstruction for low-dose cardiac gated SPECT.

(a) A transverse slice of the female NCAT phantom; (b) defect location and ROIs for bias-variance analysis and CHO assessment; and (c) ROIs for TAC and uniformity calculations.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
3.
Figure 2

Figure 2. From: 4D reconstruction for low-dose cardiac gated SPECT.

Relative root MSE of the myocardium reconstructed by different methods and dose levels. The results were averaged over 30 noise realizations and the standard deviation values were indicated by the error bars for the different methods.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
4.
Figure 4

Figure 4. From: 4D reconstruction for low-dose cardiac gated SPECT.

CHO detection Az results from different methods and dose levels. The results were calculated over 30 normal and 30 defect-present noise realizations and the standard deviation values were indicated by the error bars for the different methods.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
5.
Figure 7

Figure 7. From: 4D reconstruction for low-dose cardiac gated SPECT.

Reconstructed short-axis images from a male patient interpreted as normal in terms of wall perfusion and function (Standard: ST121 on 11M counts; Half: 5.5M counts; Quarter: 2.25M counts). ED is the slice at end-diastolic time point and ES is the end-systolic. Arrow: attenuation artifact.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
6.
Figure 6

Figure 6. From: 4D reconstruction for low-dose cardiac gated SPECT.

Reconstructed short-axis slices from a female patient with mild anterior perfusion defect (Standard: ST121 on 12.8M counts; Half: 6.4M counts; Quarter: 3.2M counts). ED is the slice at end-diastolic time point and ES is the end-systolic. Arrow A: mild ischemia; Arrow B: attenuation artifact.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
7.
Figure 3

Figure 3. From: 4D reconstruction for low-dose cardiac gated SPECT.

Bias-standard deviation plot for the normal (a) and defect (b) ROIs reconstructed by different methods and dose levels. The triangle symbols represent the standard, and the circle and diamond symbols represent half and quarter dose levels, respectively. Note that the smallest reconstruction error (consisting of bias and std) corresponds to the lower-left corner of the plot.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.
8.
Figure 5

Figure 5. From: 4D reconstruction for low-dose cardiac gated SPECT.

NCAT short-axis slices reconstructed by different methods (Standard: ST121 with 8 M counts; Half: 4 M counts; Quarter: 2 M counts). ED is the slice at end-diastolic time point and ES is the end-systolic. The ideal images are from OSEM reconstruction of the noiseless projection data without degradation of attenuation and scatter.

Mingwu Jin, et al. Med Phys. 2013 February;40(2):022501.

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