Pixellated Array

LYSO(Ce) Array

Name: LYSO(Ce) Array
Brand: ATR Crystal

LYSO(Ce) array is a high-density pixelated scintillator array used for PET, TOF-PET research, compact gamma detection, high-resolution detector modules and SiPM or PMT readout systems. LYSO(Ce) offers high density, fast decay time, good light output and stable non-hygroscopic handling, making it suitable when timing performance and compact stopping power are important. ATR Crystal manufactures custom LYSO(Ce) linear and 2D scintillator arrays according to pixel size, final pitch, pixel count, array thickness, reflector material, readout face, surface finish and photosensor matching requirements. Array layouts can be reviewed for SiPM, PMT, PSPMT or photodiode readout, with reflector selection adjusted to support light collection, pixel-to-pixel uniformity and optical crosstalk control. For more detector…

Configuration & inquiry

Built around your specification

Array type: 1D linear array, 2D pixelated array, offset array, multilayer array
Common pixel counts: 4×4, 8×8, 16×16, 20×20, 52×52, or custom layouts
Minimum pixel size: Down to 0.2 x 0.2 mm when geometry and yield allow
Reflector materials: BaSO4, ESR, E60, TiO2, Teflon / PTFE, or custom reflector

Final specifications and acceptance criteria are confirmed for the quoted configuration.

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Overview

What Is a LYSO(Ce) Scintillator Array?

LYSO(Ce) scintillator arrays are pixelated detector components made from cerium-doped lutetium yttrium oxyorthosilicate crystals. Each array is assembled from precisely cut and polished LYSO(Ce) pixels with optical reflector material between pixels to control light sharing and reduce optical crosstalk.

Compared with a single bulk crystal, a LYSO(Ce) array provides position-sensitive gamma-ray detection. This makes it suitable for PET, TOF-PET, SPECT, gamma cameras, high-energy physics detector modules, and compact radiation imaging systems.

ATR Crystal manufactures custom LYSO(Ce) arrays according to detector geometry, pixel pitch, reflector selection, surface finish, photosensor type, and light-output uniformity requirements. Arrays can be designed for SiPM, PSPMT, photodiode, or other position-sensitive readout systems.

Advantages of LYSO(Ce) Pixelated Arrays

Fast timing responseLYSO(Ce) supports fast scintillation decay, making it suitable for timing-sensitive PET and TOF-PET detector designs.
High gamma stopping powerHigh density and effective atomic number help maintain detection efficiency in compact detector blocks.
Fine pixel geometryCustom pixel size and pitch allow detector designers to balance spatial resolution, light collection, and manufacturability.
Controlled optical crosstalkReflector selection and bonding process help manage light isolation between adjacent pixels.
Readout compatibilityArrays can be matched to SiPM arrays, PSPMTs, pixelated photodiodes, and application-specific detector electronics.
Custom assembly support1D, 2D, offset, and multilayer configurations are available according to drawings or detector requirements.

Design Considerations for Custom LYSO(Ce) Arrays

For PET and gamma imaging, array performance depends not only on the scintillator material but also on pixel size, reflector thickness, polishing quality, optical coupling, and readout geometry. Smaller pixels can improve spatial resolution, but they may also reduce light collection and make assembly more demanding.

When requesting a custom array, provide the target detector application, pixel size, number of pixels, total array size, reflector material, readout device, surface finish, and required light-output uniformity. If available, a drawing or detector block layout helps confirm manufacturability.

Send your drawing and requirements through the LYSO array quotation form below.

Quality Control for LYSO(Ce) Arrays

Dimensional inspectionPixel size, array pitch, total dimensions, and surface finish are checked against the drawing.
Relative light output testingEach array can be evaluated for light output according to project requirements.
Pixel uniformity testingUniformity levels such as <=10%, <=20%, <=30%, or custom criteria can be specified.
Energy resolution testingDetector-related tests can be arranged depending on geometry and test conditions.
Scatter map evaluationScatter map inspection helps verify pixel separation and optical isolation in the array.
Visual and assembly inspectionReflector integrity, bonding quality, and edge condition are reviewed before shipment.

Related selection guide

LYSO vs BGO Scintillator: Timing, Density and Detector Selection

Specifications

LYSO(Ce) Array Specifications

Array Geometry and Assembly Options

Item	Typical Options
Array type	1D linear array, 2D pixelated array, offset array, multilayer array
Common pixel counts	4×4, 8×8, 16×16, 20×20, 52×52, or custom layouts
Minimum pixel size	Down to 0.2 x 0.2 mm when geometry and yield allow
Reflector materials	BaSO4, ESR, E60, TiO2, Teflon / PTFE, or custom reflector
Surface finish	Polished, roughened, painted, or application-specific finish
Readout matching	SiPM array, PSPMT, photodiode, or custom photosensor layout
Uniformity control	Pixel light output uniformity available at requested tolerance levels

Reflector Material and Typical Thickness

Reflector Material	Typical Reflector + Adhesive Thickness
BaSO4	Greater than or equal to 0.1 mm
ESR	Approx. 0.08 mm
E60	Approx. 0.075 mm
TiO2	Greater than or equal to 0.1 mm

LYSO(Ce) Crystal Material Properties Used in Arrays

Parameter	Standard Type	Fast Decay Type
Density	7.4 g/cm3	7.4 g/cm3
Radiation length	1.1 cm	1.1 cm
Effective atomic number	66	66
Decay constant	40-44 ns	32-34 ns
Light yield	Approx. 32,000 photons/MeV	Approx. 29,000 photons/MeV
Refractive index	1.82	1.82
Maximum emission wavelength	420 nm	420 nm
Melting point	2050 °C	2050 °C
Hardness	5.8 Mohs	5.8 Mohs
Cleavage	No	No
Hygroscopicity	No	No

Comparison with Related Scintillator Arrays

Use this table to compare common pixelated scintillator array choices at the design-selection stage. Final selection should still be confirmed against pixel size, reflector, readout, and test conditions. For timing, light output and readout considerations, see our GAGG vs LYSO scintillator comparison.

Design Point	LYSO(Ce) Array	GAGG(Ce) Array	BGO Array	CdWO4 Array	CsI(Tl) Array
Density / stopping power	High, about 7.1-7.4 g/cm3	High, about 6.6 g/cm3	High, about 7.13 g/cm3	Very high, about 7.9 g/cm3	Moderate, about 4.51 g/cm3
Timing / decay behavior	Fast, about 32-44 ns depending on type	Fast to balanced, type dependent	Slower, about 300 ns	Very slow, about 14000 ns	Slower, about 1000 ns
Typical strength	PET, TOF-PET, compact gamma imaging	High light output, no Lu-176 background	Compact stopping power, no intrinsic background	Low afterglow CT and scanning systems	High light output and photodiode matching
Handling	Non-hygroscopic	Non-hygroscopic	Non-hygroscopic	Non-hygroscopic	Slightly hygroscopic

Applications

Applications of LYSO(Ce) Arrays

PET and TOF-PET detector blocks
SPECT and gamma camera modules
Small-animal imaging and preclinical PET systems
High-energy physics calorimeter modules
Security inspection and radiation imaging systems
Compact gamma detector and coded-aperture imaging devices

Ordering

Frequently Asked Questions

What is the difference between a LYSO(Ce) crystal and a LYSO(Ce) array?

A LYSO(Ce) crystal is a single scintillator piece, while a LYSO(Ce) array is assembled from many individual pixels separated by reflector material. The array provides position-sensitive detection for imaging applications.

What is the minimum pixel size for LYSO(Ce) arrays?

The current product information lists a minimum pixel size down to 0.2 x 0.2 mm. Actual feasibility depends on array size, aspect ratio, reflector choice, yield, and handling requirements.

Which reflector material should I choose?

BaSO4, ESR, E60, TiO2, and PTFE are common options. The best choice depends on pixel pitch, required light output, crosstalk control, mechanical constraints, and readout method.

Can ATR Crystal manufacture offset or multilayer LYSO(Ce) arrays?

Yes. Offset and multilayer LYSO(Ce) array configurations can be discussed when the detector layout, layer thickness, pixel arrangement, and alignment tolerance are provided.

Identify each layer separately, including pixel count, crystal length, layer order, offsets and the readout face. Define the reference corner and alignment tolerances between layers. An overall envelope does not specify the internal arrangement. Include a section view when an offset or interface cannot be described clearly in the top view.

What information is needed for a quotation?

Please provide pixel size, pixel count, total dimensions, reflector material and thickness, surface finish, readout device, quantity, uniformity requirement, and any drawing or detector module specification.

Does a LYSO decay-time value specify the timing resolution of an array?

No. Material decay time and the timing resolution of an assembled measurement system describe different quantities. For a timing requirement, identify the crystal geometry, photosensor, optical coupling, electronics and measurement method. State whether the target concerns a single channel or a coincidence measurement, and request confirmation of the agreed test configuration before using the value as an acceptance limit.

Product inquiry

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