Article Figures & Data
Figures
- FIGURE 1.
All balloons in phantom.
- FIGURE 2.
Balloons attached to syringes, which are inserted through holes in lid of phantom. When lid is mounted on phantom, syringes hang from top of phantom, with balloons a few centimeters from bottom of box.
- FIGURE 3.
Comparison of methods for volume delineation, using either Imean or I′mean in Equation 1. (A) Relative volume error for ratio of 4.1. (B) Corresponding results for ratio of 6.0.
- FIGURE 4.
Volume estimates for activity ratios of 4.1, 9.1, and 14.9. (A) Results for images reconstructed with SharpIR. (B) Results for images reconstructed with VP HD. Ratios of 4.1 and 9.1 are slightly shifted to left to improve clarity.
- FIGURE 5.
Uptake estimates for activity ratios 4.1, 9.1, and 14.9 before and after partial-volume corrections, and compared with maximum uptake value. Original uptake and corrected uptake are shifted slightly to left to improve clarity.
Tables
Volume (mL) Diameter (mm) Height (mm) Equivalent diameter (mm) 0.113 6 7 6.0 0.208 7 8 7.4 0.352 8 10 8.8 0.481 8 12 9.7 0.698 10 15 11.0 Activity ratio VP HD SharpIR 4.1 0.300 0.250 6.0 0.325 0.275 9.1 0.350 0.300 12.5 0.375 0.300 14.9 0.375 0.300 No background 0.425 0.275 Mean 0.350 0.275 Mean value is rounded to closest of tested values.
