Dispensing workflow · SPECT Lead-Lined Syringe Shield
The same 3 mm lead workhorse covers MDP, MIBI, ECD, MAG3 and DMSA Tc-99m kit dispensing across an entire shift. Higher-energy SPECT isotopes — I-131, Ga-67, In-111 — step up to the 6 mm or 9 mm tier of the same chassis family. This page is the per-kit build sheet plus the step-up decision matrix.
Daily Tc-99m kits — 3 mm Pb shield
Shield (size · SKU)
3 cc / 5 cc — 3 mm Pb (RPSS-3-08-3-S-P-N · RPSS-5-08-3-S-P-N)
Activity per dose
20–25 mCi (740–925 MBq) per adult patient
Dispense flow
Generator elution → cold-kit reconstitution → per-patient draw → shield → dose-calibrator assay → patient injection
Notes: 3 cc is the workhorse; 5 cc for higher-activity protocols. Per-patient extremity dose stays comfortably inside the annual budget at typical bone-scan throughput.
Shield (size · SKU)
3 cc — 3 mm Pb (RPSS-3-08-3-S-P-N)
Activity per dose
8–12 mCi (300–450 MBq) rest; 25–30 mCi (925–1110 MBq) stress
Dispense flow
Generator elution → kit reconstitution + boiling → per-patient draw → shield → calibrator → stress / rest injection
Notes: Two-day or same-day protocol means two dispenses per patient. The 3 cc shield handles both rest and stress activities without size change.
Shield (size · SKU)
3 cc — 3 mm Pb (RPSS-3-08-3-S-P-N)
Activity per dose
15–25 mCi (555–925 MBq) per patient
Dispense flow
Kit reconstitution → 30-min stability check → per-patient draw → shield → calibrator → injection at specified time
Notes: Time-sensitive labelling — keep the shield ready on the bench so the labelled product enters protection immediately on reconstitution.
Shield (size · SKU)
2 cc / 3 cc — 3 mm Pb (RPSS-2-08-3-S-P-N · RPSS-3-08-3-S-P-N)
Activity per dose
5–10 mCi (185–370 MBq) per patient
Dispense flow
Kit reconstitution + heating step → per-patient draw → shield → calibrator → injection
Notes: Smaller-volume dispense; 2 cc shield fits the lower-volume patient draws while 3 cc handles routine adult cases.
Shield (size · SKU)
1 cc / 2 cc — 3 mm Pb (RPSS-1-08-3-S-P-N · RPSS-2-08-3-S-P-N)
Activity per dose
2–5 mCi (75–185 MBq) per patient — paediatric activities lower
Dispense flow
Kit reconstitution → per-patient draw → shield → calibrator → injection (longer imaging delay)
Notes: Low-activity per dose; the 1 cc shield handles paediatric cases where the dispensing volume is < 0.5 mL.
Higher-energy SPECT — step-up tiers
| Isotope / workflow | Lead tier | Why |
|---|---|---|
| I-131 capsule decant | 9 mm lead (custom build RPSS-X-17-9-SS 202-T-P-N variant) | I-131 at 364 keV needs ~9 mm lead for 3 HVL of attenuation; pair with the Saxsons Lead-Lined Fume Hood (10 / 12 mm shielded enclosure) for high-activity capsule decant |
| Ga-67 (Gallium scan) | 6 mm lead | Multi-peak (93 / 184 / 296 keV); 6 mm lead covers the dominant 93 / 184 keV peaks comfortably with one extra HVL margin on the 296 keV high-energy line |
| In-111 (Octreoscan / WBC label) | 6 mm lead | Dual photopeaks at 171 / 245 keV; 6 mm lead gives sufficient attenuation for the WBC-labelling workflow which typically operates at 4–5 mCi per patient |
Ring-badge extremity-dose log
Each operator on the SPECT dispensing line wears a TLD ring badge on the dominant hand during the shift. The badge integrates extremity dose; monthly readouts roll up into the annual ICRP / AERB 500 mSv budget. The 3 mm lead shield is the engineered intervention that keeps the per-dispense extremity dose comfortably inside the budget at typical Tc-99m throughput — the ring badge is the measurement that confirms the intervention is working installation by installation, shift by shift.
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