Article Figures & Data
Figures
- FIGURE 1.
Relationship between daily doses recorded at back waist and at front waist. Line of best fit excludes single anomalous point. Correlation coefficient = 0.91. Line of best fit: back = 0.29 × front + 0.49.
- FIGURE 2.
Ratio of back-waist dose to front-waist dose for 30-min intervals plotted against front-waist dose. Technologist was known to be scanning patients during these intervals. Dashed line indicates slope of graph for back-waist daily dose vs. front-waist daily dose (shown in Fig. 1).
- FIGURE 3.
Relationship between daily doses recorded at collar and at waist. Line of identity is shown. Correlation coefficient = 0.90.
- FIGURE 4.
Relationship between daily doses recorded at collar and at waist: plotted separately for days spent in scanning rooms and days spent performing injections. Ratio of collar to waist is 1.1 ± 0.3 (mean ± SD) for scanning days and 1.7 ± 0.3 (mean ± SD) for injection days.
Tables
Scan Isotope Typical activity (MBq) μSv/h* n GHPS 99mTc 900 1.9 ± 1.3 9 MIBI Stress cardiac scan 99mTc 1,000 1.8 ± 1.4 8 Rest cardiac scan 99mTc 300 0.9 ± 0.6 4 131I scan after therapy 131I 20 μSv/h at 1 m → ∼350 0.8 ± 1.4 10 Ventilation/perfusion lung scan 99mTc 500 + 220 0.8 ± 0.7 28 Bone scan 99mTc 900 0.8 ± 0.6 34 Labeled white blood cells 99mTc 800 0.7 ± 0.7 6 67Ga tumor scan 67Ga 370 0.7 ± 0.3 8 Thyroid scan 99mTc 150 0.4 ± 0.3 4 Renal scan 99mTc 180 0.4 ± 0.4 26 Stress cardiac scan 201Tl 100 0.4 ± 0.5 6 Rest cardiac scan 201Tl 40 0.2 ± 0.1 6 Brain SPECT 99mTc 900 — 2 ↵* Mean ± SD.
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