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Determination of Crystal Structures

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Calibration procedure for a continuous miniature crystal element (cMiCE) detector.

Robert S Miyaoka¹, Tao Ling, Cate Lockhart

¹University of Washington Department of Radiology, Seattle, WA 98195 USA (telephone: 206-543-2084, rmiyaoka@u.washington.edu ).

IEEE Nuclear Science Symposium Conference Record. Nuclear Science Symposium

|July 8, 2010

Summary

We developed three methods to significantly reduce calibration time for our continuous miniature crystal element (cMiCE) detector. These techniques improve efficiency without compromising the detector's ~1.4 mm spatial resolution.

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Last Updated: Jun 11, 2026

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Published on: May 10, 2021

Area of Science:

Medical Physics
Instrumentation
Detector Technology

Background:

Continuous miniature crystal element (cMiCE) detectors offer a cost-effective alternative to finely pixilated detectors.
These detectors utilize a LYSO crystal and a 64-channel photomultiplier tube (PMT) for imaging.
A key challenge is the lengthy calibration process required for optimal performance.

Purpose of the Study:

To investigate and implement methods for accelerating the calibration of cMiCE detectors.
To maintain high intrinsic spatial resolution (~1.4 mm FWHM) during accelerated calibration.
To reduce the overall time and complexity of detector setup and characterization.

Main Methods:

Utilizing multiple point fluxes from a custom multi-source device for simultaneous calibration of detector regions.
Employing coarser sampling intervals during characterization and using interpolation for high-resolution lookup tables.
Adjusting point flux diameter by modifying detector-source geometry to increase counting rates and reduce spot size.

Main Results:

Demonstrated feasibility of simultaneous multi-point calibration, reducing data acquisition time.
Evaluated spatial resolution performance across various sampling intervals for interpolation methods.
Quantified the trade-offs between geometric adjustments, counting rates, and spatial resolution.

Conclusions:

The proposed methods effectively reduce cMiCE detector calibration time.
Achieved calibration acceleration while preserving the critical ~1.4 mm FWHM spatial resolution.
These advancements make cMiCE detectors more practical and accessible for various applications.