Thyroid Uptake Using 131I Capsules for 3 Patients
| Dose calibrator | Probe | 24-h uptake | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Patient no. | Activity (MBq) | Time | Count 1 (cps) | Count 2 (cps) | Room background counts (cps) | Net capsule counts (cps) | Time | Room background time | Probe efficiency (cps/MBq) | Original (%) | Adjusted (%) |
| 1 | 0.420 | 9:16 | 213 | 210 | 1 | 211 | 8:26 | 8:23 | 501 | 139.6% | 71% |
| 2 | 0.435 | 10:35 | 214 | 216 | 1 | 214 | 8:29 | 8:23 | 490 | 34.8% | 18% |
| 3 | 0.388 | 9:08 | 208 | 206 | 1 | 206 | 13:24 | 8:23 | 534 | 47.0% | 24% |
Original 24-h thyroid uptake results are shown along with their corresponding adjusted values after compensating for deviations in probe efficiencies from previous patients (Table 2). Time is expressed as time of day (hr:min).