Customized 1200mm X 2400mm Radiation Shielding Lead Glass with High Impact Resistance and High Visible Light Transmission

Background: 1,500 SPECT procedures/year (⁹⁹ᵐTc), existing window was 1.5 mm Pb lead acrylic installed 6 years ago – severe yellowing, visual obstruction.

Jovvi solution: 2.8 mm Pb nuclear‑grade lead glass, 1200×800 mm, with CeO₂ stabilization.

Result:

• Visible transmission improved from 62% (degraded acrylic) to 83% (new Jovvi glass)
• Radiation leakage at glass perimeter: 0.02 mR/hr (well below 0.05 mR/hr limit)
• 18 months post‑installation: no measurable browning (ΔE = 0.8)
• Technologist reported reduced eye strain and improved ability to see patient positioning

Background: High‑volume PET‑CT (40 patients/day, ¹⁸F‑FDG, average 12 mCi/patient). Control booth had 4 mm Pb monolithic lead glass – staff reported dose rate at glass surface 0.8 mR/hr (above local limit of 0.2 mR/hr).

Jovvi solution: Composite window – 2.5 mm Pb glass + 10 mm lead acrylic + 2.5 mm Pb glass, 1500×1000 mm.

Result:

• Surface dose rate reduced to 0.09 mR/hr (89% reduction)
• Glass weight: 72 kg/m² vs. 98 kg/m² for 4 mm Pb monolithic (26% lighter)
• Staff confidence improved; no additional wall shielding needed
• Payback period: 14 months (avoided cost of supplementary lead sheet installation)

Background: Single control room serving three modalities (chest X‑ray, CT, SPECT). Original design used separate windows for each – messy, high cost.

Jovvi solution: Single large window 2000×1200 mm, 3.0 mm Pb equivalent nuclear grade (handles highest modality – SPECT).

Result:

• One window for all three rooms, reducing frame and installation cost by 35%
• Staff can see all three patients simultaneously – improved workflow
• Lead equivalence verified at 100 kVp (X‑ray), 140 keV (SPECT), and 511 keV (not applicable – no PET‑CT on site)
• Hospital saved $4,500 compared to three separate windows

Background: Fume hood for ⁹⁹ᵐTc and ¹⁸F‑FDG preparation. Existing port was standard laboratory glass (no shielding) – finger dose to pharmacist when drawing doses.

Jovvi solution: 2.5 mm Pb lead glass viewing port, 400×300 mm, installed into 1 inch lead brick wall.

Result:

• Dose rate at pharmacist position: from 2.5 mR/hr to 0.08 mR/hr (97% reduction)
• Glass clarity sufficient to read syringe graduations (critical for accuracy)
• Pharmacist reported "no more hand fatigue from holding syringe behind portable shield"