Jovvi international
| Operating temperature | -20°C to 60°C |
| Flatness tolerance | <0.5 mm over 1m |
| Lead oxide content | 68-72 wt% |
| Weight density | 70 kg/m² (composite) |
| Supply Ability | 2000 Pcs Per Month |
| Payment Terms | L/C,T/T |
| Delivery Time | 5-8 Work Days |
| Size range | 0.2m*0.3m-2.4m*1.2m |
| Place Of Origin | China |
| Packaging Details | In Wooden Case Or Customized |
| Transmission at 511 keV | 15% (composite) |
| Certification | CE |
| Model Number | 1-cf-15 |
| Brand Name | Jovi |
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Product Specification
| Operating temperature | -20°C to 60°C | Flatness tolerance | <0.5 mm over 1m |
| Lead oxide content | 68-72 wt% | Weight density | 70 kg/m² (composite) |
| Supply Ability | 2000 Pcs Per Month | Payment Terms | L/C,T/T |
| Delivery Time | 5-8 Work Days | Size range | 0.2m*0.3m-2.4m*1.2m |
| Place Of Origin | China | Packaging Details | In Wooden Case Or Customized |
| Transmission at 511 keV | 15% (composite) | Certification | CE |
| Model Number | 1-cf-15 | Brand Name | Jovi |
511 keV annihilation photons from PET (¹⁸F‑FDG) have fundamentally different interaction physics than diagnostic X‑rays.
| Parameter | Diagnostic X‑ray (120 kVp) | PET (511 keV) |
|---|---|---|
| Dominant interaction | Photoelectric effect (μ ∝ Z⁴/E³) | Compton scattering (μ ∝ Z/E) |
| Lead glass attenuation | Highly efficient | Moderately efficient |
| Half‑value layer (Pb) | ~0.26 mm | ~4.0 mm |
| Tenth‑value layer (Pb) | ~0.86 mm | ~13.3 mm |
Consequence: A 2.5 mm Pb lead glass panel that stops 99.9% of 120 kVp X‑rays stops only ~35% of 511 keV photons.
Jovvi quality for PET‑CT means:
High lead oxide content (68–72 wt% – maximum feasible) to increase density and Compton cross‑section
Minimum bubble interference – any bubble >0.3 mm reduces effective density locally
Flatness <0.5 mm over 1 m – composite windows require precise lamination
Jovvi offers three shielding strategies for PET‑CT control booths:
Option A: Thick Monolithic Lead Glass
5.0–5.5 mm Pb equivalent (physical 28–32 mm)
Weight: 110–130 kg/m²
Transmission at 511 keV: ~50% (5 mm Pb) to ~40% (5.5 mm Pb)
Use when: Budget allows, floor loading capacity >200 kg/m², staff stay >3 m from glass
Option B: Jovvi Composite Window (Recommended)
Construction: 2.5 mm Pb lead glass + 10 mm lead acrylic + 2.5 mm Pb lead glass
Total Pb equivalent: ~8 mm at 511 keV (due to acrylic's lower effective Z, actual attenuation is ~7 mm Pb equivalent)
Transmission at 511 keV: ~15%
Weight: ~70 kg/m² (40% lighter than 5.5 mm monolithic)
Use when: Optimal balance of safety, weight, and cost
Option C: Lead Glass + Supplementary Wall Shielding
Glass alone: 3.0 mm Pb (physical 18 mm)
Additional 2 mm lead sheet on walls around window
Staff positioned >4 m from glass
Use when: Retrofit where frame cannot support heavy composite or thick monolithic
Attenuation comparison (511 keV, narrow beam):
| Solution | Thickness | % Transmission | Weight (kg/m²) | Relative Cost |
|---|---|---|---|---|
| 2.5 mm Pb glass only | 15 mm | 65% | 55 | 1.0x |
| 3.5 mm Pb glass only | 20 mm | 53% | 75 | 1.4x |
| 5.0 mm Pb glass only | 28 mm | 50% | 110 | 2.2x |
| Jovvi composite (2.5+10+2.5) | ~35 mm total | 15% | 70 | 1.9x |
Composite provides 3x better shielding than 5 mm monolithic at 2/3 the weight and similar cost.
Composite windows require three separate quality controls:
Lead glass panels (front and rear) – each tested individually for 140 keV and 511 keV
Lead acrylic middle layer – tested for attenuation (typically 2.5–3.0 mm Pb equivalent at 140 keV; ~1.5 mm Pb eq. at 511 keV)
Lamination integrity – optical bonding with UV‑stable adhesive, tested for:
No delamination under thermal cycling (-10°C to +40°C, 10 cycles)
No haze increase after 500 hours gamma exposure
Company Details
Year Established:
2010
Total Annual:
10000000-20000000
Employee Number:
100~500
Ecer Certification：
Verified Supplier
Jovvi(Beijing Hengtai Tech Co., Ltd) was established in 2010. The company adheres to the development concept of “integrity all over the world and conducts all continents”, adheres to the business policy of “strive to create greater value for customers”, and is committed... Jovvi(Beijing Hengtai Tech Co., Ltd) was established in 2010. The company adheres to the development concept of “integrity all over the world and conducts all continents”, adheres to the business policy of “strive to create greater value for customers”, and is committed...
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