BGO Array
ATR Crystal supplies custom BGO scintillator arrays for PET, gamma-ray detection and imaging modules. Linear and 2D arrays can be reviewed according to your drawing, pixel dimensions, pitch, reflector and optical interface. Send the array layout, surface requirements, photosensor type and quantity for a quotation. Final dimensions, processing feasibility and acceptance tests are confirmed for the quoted configuration.
Built around your specification
- Pixel dimensions
- Crystal cross-section and length per drawing
- Pixel count
- Specified rows and columns
- Pixel pitch
- To be agreed with the inter-pixel stack
- Readout face
- Marked on the assembly drawing
Final specifications and acceptance criteria are confirmed for the quoted configuration.
Request a quotationOverview
BGO Scintillator Array Overview
A BGO scintillator array combines individual bismuth germanate crystal elements into a drawing-defined layout. ATR Crystal reviews custom array inquiries for gamma-ray detection, PET research and imaging components. The quotation should identify the crystal dimensions, pixel pitch, reflector arrangement and sensor interface together.
For bulk material properties, see the BGO scintillation crystal page. This page focuses on specifying the finished array, where the space between pixels and the treatment of each optical surface also matter.
Related selection guide
LYSO vs BGO Scintillator: Timing, Density and Detector Selection
Specifications
BGO Array Specifications to Confirm
The following items describe quotation inputs, not a stock-size list or a guaranteed manufacturing limit. Final dimensions and processing feasibility need confirmation for the proposed geometry.
| Configuration item | Basis for quotation |
|---|---|
| Pixel dimensions | Crystal cross-section and length per drawing |
| Pixel count | Specified rows and columns |
| Pixel pitch | To be agreed with the inter-pixel stack |
| Readout face | Marked on the assembly drawing |
Pixel cross-section, pitch and overall array size are different measurements. Specifying only the number of pixels leaves the sensor alignment and mechanical fit unresolved.
| Drawing item | What to specify | Why it matters |
|---|---|---|
| Bare crystal size | Width, height and crystal length, with units and tolerances | Defines each scintillator element before the inter-pixel stack is added. |
| Pixel pitch | Centre-to-centre spacing in both array directions | Defines the alignment pattern relative to the photosensor. |
| Inter-pixel stack | Reflector, adhesive and any intended gap | Clarifies what occupies the space between adjacent crystal elements. |
| Finished envelope | Total width, height and thickness, including edge treatment or backing | Defines the component that must fit the holder. |
| Orientation | Readout face, row direction and any required reference edge | Lets the array drawing and sensor layout use the same reference. |
Illustrative drawing check: four pixels, each 2.9 mm wide, on a uniform 3.0 mm pitch span 2.9 + 3 × 3.0 = 11.9 mm before any outer reflector or housing is added. Four times the pitch would give 12.0 mm, which is a different dimension. This example explains the drawing convention; the finished envelope must include the actual edge construction.
Reflector and Readout Specifications
Identify the reflector material and distinguish the reflector film thickness from the complete reflector-and-adhesive stack. For BaSO4, ESR, E60 or TiO2 proposals, ask for the offered construction and finished spacing instead of assuming a universal thickness from the material name.
Mark which faces are polished, lapped, covered or left available for coupling. Include the photosensor model, active area and whether the design uses one-to-one coupling or light sharing. If a backing, optical window or light guide is required, show it separately and state who supplies it.
A published study of BGO arrays with different reflector arrangements evaluated changes in light distribution and detector response. Its measurements apply to the tested assemblies; they do not establish an acceptance specification for an ATR array.
Applications
Applications and Measurement Priorities
BGO is a dense, non-hygroscopic scintillator. Luxium’s BGO material reference describes its gamma-ray absorption and use in detector arrays. The finished component still needs a specification matched to the intended measurement:
PET research: define crystal-to-sensor alignment, light collection and the required imaging or timing measurement.
Gamma-ray imaging: specify pixel layout, readout geometry and how neighbouring signals will be evaluated.
Physics detector development: define the energy range, available volume and required response for the proposed array.
Compact instrument components: confirm the finished envelope, mounting interface and operating conditions.
For material selection, use the GAGG versus BGO comparison. For BGO timing and reference-data interpretation, see the BGO gamma-detection design notes.
Ordering
BGO Array RFQ and Acceptance Checklist
Send the dimensioned array drawing, sensor layout, application, sample quantity and intended order quantity. Identify the acceptance checks you need and agree on the measurement method and who performs each test before ordering.
| Requested check | Information to agree | How to interpret it |
|---|---|---|
| Dimensions and alignment | Drawing revision, tolerances, measurement locations and report requirements | Assess the finished array against the approved drawing. |
| Pixel light-output uniformity | Test source, sensor, coupling, acquisition settings and calculation method | A percentage is comparable only when its measurement and definition are stated. |
| Pixel identification or cross-talk | Readout arrangement, irradiation method and evaluation criterion | A flood histogram and an optical cross-talk measurement answer different questions. |
| Energy or timing resolution | Radiation energy, sensor, electronics, temperature and analysis method | These are detector measurements, not performance guarantees from crystal geometry alone. |
If the quotation proposes a different finish, reflector or layout, record the change as an explicit alternative. Keep the baseline drawing unchanged so that the offered configurations can be compared.
Frequently Asked Questions
Is pixel size the same as pixel pitch?
No. Pixel size describes the crystal cross-section. Pitch is the centre-to-centre spacing and includes the effect of the inter-pixel construction. Provide both on the drawing.
What is the minimum BGO pixel size?
The feasible size must be confirmed with the crystal length, reflector stack, surface treatment and assembly requirements. Send the proposed dimensions for review before treating a minimum-size figure as an order specification.
Does non-hygroscopic BGO remove all packaging requirements?
No. The material does not require a hermetic package for moisture protection, but the finished design may still need mechanical protection, light exclusion, mounting or an optical interface.
Does the array quotation include a photosensor and electronics?
State the supply boundary explicitly. Identify whether the inquiry is for the crystal array alone and list any sensor, holder, coupling material or electronics separately.
How should the readout orientation of a BGO array be identified?
Mark the readout face and a reference corner on the drawing, and state whether the layout is viewed from the sensor side or the radiation-entry side. Use the same convention for any pixel numbering. This makes it possible to check the proposed array against the sensor layout without accidentally reversing or rotating the channel map.
How should prototype and production BGO array drawings be linked?
Use a drawing number and revision for the approved prototype. For a repeat order, identify any changes to geometry, reflector construction, surface finish or readout interface explicitly. Ask for the quotation to reference that revision and the agreed inspection criteria. A prototype approval should not be assumed to cover a later configuration with different materials or dimensions.
Send your BGO array drawing and acceptance requirements for a component quotation.
Request a quotation
Send your application and specification requirements directly from this page.
Prefer email? Send your drawing or specification sheet to:
sales@atrscintillator.com