Per-isotope workflow · Lead Vial Shield
The vial-shield tier the radiopharmacist picks is set by the isotope photopeak energy and the workflow throughput. This page is the per-isotope build sheet — tier, closure, workflow and AERB dose-log entry per scenario.
Photopeak
140 keV photopeak
Tier
6 mm Pb (lead-glass window optional)
Closure
Slide lock
Workflow
Daily cold-kit dispensing — MDP, MIBI, ECD, MAG3, DMSA. Operator opens slide lock, withdraws unit dose, closes shield. Lead-glass window lets the operator read residual vial volume before withdrawing the next dose.
AERB record: Per-dispense extremity dose logged via TLD ring badge; cumulative monthly entered in the operator dose register.
Photopeak
364 keV photopeak
Tier
12 mm Pb
Closure
Slide lock
Workflow
Per-patient capsule decant from bulk vial; or oral-solution withdrawal. The 12 mm tier brings transmission down to ~6 % at 364 keV; without the step-up from 6 mm SPECT tier, the operator extremity dose would breach the AERB action threshold for therapy-level activities.
AERB record: I-131 therapy licence required; daily dispense log paired with patient release-dose records.
Photopeak
511 keV annihilation
Tier
30 mm Pb
Closure
Thread + magnetic top cap
Workflow
Routine FDG dispensing — typically 30+ doses per shift at 350–550 MBq each. Magnetic top cap opens with a hand wave for needle access; cap stays on the shield throughout. Operator never carries the cap separately.
AERB record: TLD ring-badge dose log; PET licence covers the dispensing-line operation; per-shift dispense count in the QA log.
Photopeak
511 keV annihilation
Tier
30 mm Pb
Closure
Thread + magnetic top cap
Workflow
Per-generator elution + DOTATATE / DOTATOC / PSMA-11 labelling + 1–4 patient doses at 100–200 MBq. Same 30 mm tier as FDG; the routine PET dispensing tier covers the Ga-68 workflow without configuration change.
AERB record: Generator licence + dispensing log; same dose-monitoring chain as FDG.
Photopeak
511 keV annihilation
Tier
50 mm Pb
Closure
Thread + magnetic top cap
Workflow
Source-vial multi-dose dispensing for high-throughput PET; the 50 mm tier brings transmitted dose-rate at the operator surface down further than the routine 30 mm tier. Useful where source vials sit on the bench for hours during the dispensing campaign.
AERB record: Same as routine PET but with cumulative extremity-dose flag from the dispensing-line activity profile.
Photopeak
113 / 208 keV doublet + β contribution
Tier
50 mm Pb (routine) or β/γ hybrid (Pb + Perspex) for β-dominant workflows
Closure
Thread + magnetic top cap (routine) or Thread turn lock (hybrid)
Workflow
Per-batch Lu-177 DOTATATE / PSMA-617 / FAPI dispensing — 4–7.4 GBq per theranostic patient. The 50 mm tier covers the photon contribution; the β/γ hybrid is the better fit when the β-bremsstrahlung load matters more than the photon dose-rate.
AERB record: Theranostic licence + per-batch dose log; patient release records paired with the dispense audit trail.
Photopeak
Pure β-emitter (E_max 2.28 MeV); secondary bremsstrahlung γ
Tier
β/γ Hybrid (6 mm Pb + 6 mm Perspex inner)
Closure
Thread turn lock
Workflow
Y-90 microsphere preparation for transarterial radioembolisation. The Perspex inner absorbs the β before it reaches the Pb — eliminating the bremsstrahlung source. The Pb outer handles secondary γ. Hybrid build delivers lower transmitted dose-rate than thicker Pb alone at equivalent chassis weight.
AERB record: Y-90 dispensing licence + IR-suite chain-of-custody for the microsphere kit.
Photopeak
Per source isotope
Tier
40 mm Pb lead pot (transport-grade)
Closure
Pin turn lock
Workflow
Inter-room and inter-site transit of high-activity vials. The 40 mm Pb pot with pin-turn lock is tamper-evident and positively locked. The MS-painted outer keeps the transport-only build cost lower than the SS-202 dispensing outer; transport happens once per vial, dispensing happens many times.
AERB record: Chain-of-custody log + transport-pot signature on receipt at the destination site.
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