Article Figures & Data
Figures
- FIGURE 1.
Thyroid uptake probe (131I capsule in acrylic glass phantom).
- FIGURE 2.
Scatter counts 8 cm away from 0.925-MBq 131I capsule.
- FIGURE 3.
Counts for capsules arranged around center capsule.
- FIGURE 4.
Capsule arrangement in camera-based 131I capsule counter.
- FIGURE 5.
Counts vs. capsule number, by camera-based and probe-based methods.
Tables
- TABLE 1
Scatter Count and Percentage Scatter Contribution at Different Distances in y Direction from Centered 0.925-MBq Capsule
0.925 MBq 1.85 MBq ROI Above center Below center Above center Below center Center 4,327 (100%) 4,327 (100%) 6,666 (100%) 6,666 (100%) 2 cm 60 (1.38%) 116 (2.6%) 595 (8.9%) 588 (7.1%) 4 cm 46 (1%) 53 (1.22%) 294 (4.4%) 129 (1.9%) 6 cm 40 (1%) 42 (1%) 113 (1.6%) 64 (0.9%) 8 cm 38 (1%) 19 (0.4%) 32 (0.4%) 10 (0.1%) ROI = region of interest.
- TABLE 3
Camera-Based Counts at Various Acquisition Times vs. Probe-Based Counts for 0.925-MBq Capsules
Camera-based count Probe-based count Capsule no. 100 s 200 s 300 s 10 s 1 4,639 9,297 13,775 5,377 2 4,215 8,271 12,375 4,665 3 4,296 8,627 12,750 4,832 4 4,302 8,729 13,334 4,826 5 4,911 9,895 14,669 5,258 6 4,849 9,519 14,156 5,419 7 4,391 8,557 12,935 5,010 8 4,850 9,741 14,543 5,353 9 4,645 9,447 14,458 5,443 10 3,913 7,764 11,641 4,493 11 3,794 7,644 11,313 4,215 12 5,149 10,216 14,945 5,555 13 4,481 9,215 13,566 4,982 14 4,125 8,209 12,468 4,655 15 5,281 10,338 15,836 5,655 Mean 4,523 9,031 13,518 5,049 SD 434 851 1,279 428 - TABLE 4
Camera-Based Counts at Various Acquisition Times vs. Probe-Based Counts for 1.85-MBq Capsules
Camera-based count Probe-based count Capsule no. 100 s 200 s 300 s 10 s 1 9,096 18,090 26,761 9,790 2 8,695 17,704 26,344 9,462 3 8,567 17,341 27,009 9,562 4 8,729 17,141 26,200 9,277 5 8,150 16,392 24,814 9,109 6 9,377 18,658 28,271 9,946 7 9,232 18,450 28,375 9,904 8 8,282 16,528 25,320 9,057 9 8,141 16,566 25,100 9,068 10 8,046 16,328 24,164 8,999 11 8,588 17,317 26,201 9,288 12 9,160 19,213 27,620 9,934 13 8,230 16,249 23,709 8,975 14 9,724 19,096 28,742 10,292 15 8,580 17,431 25,836 9,273 16 9,291 18,160 27,271 9,579 17 8,629 17,346 26,598 9,395 18 8,590 17,359 25,901 9,329 19 7,949 15,789 23,666 8,978 20 9,238 17,781 26,848 9,847 Mean 8,694.63 17,413.11 26,209.95 9,453.11 SD 511.24 979.93 1,505.46 408.17
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