Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET

Ma Tianyu, Rutao Yao, Yiping Shao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

In this work we studied the techniques for determining the geometrical parameters for small animal SPECT imaging on an existing MicroPET scanner. A slit-slat collimator was inserted into the PET scanner's detector ring and the imaging subject was rotated to acquire SPECT tomographic data. The parameters to be calibrated included the center of rotation (COR) of the imaging subject, the slit-aperture center (SAC) positions and the tilt and twist angles of the slats. Based on acquiring multiple projections of point sources, we proved that, if the collimator has only one slit, two sets of projection data with each from a different point source location, and known distance between, is enough for uniquely determining COR and SAC. When the collimator consists of two or more slits, only one set of projection is enough. A least-square fitting procedure was used for determining the transaxial geometrical parameters including COR and SAC. A method to determine tilt and twist angles of the slats was proposed by using the axial information of the projection of point sources. Monte Carlo simulation and experimental studies were performed to evaluate the validity and accuracy of the calibration techniques. The reconstructed images with calibrated parameters showed satisfactory image quality.

Original languageEnglish (US)
Title of host publication2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Pages4285-4288
Number of pages4
Volume6
DOIs
StatePublished - Dec 1 2007
Event2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
Duration: Oct 27 2007Nov 3 2007

Other

Other2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
CountryUnited States
CityHonolulu, HI
Period10/27/0711/3/07

Fingerprint

Imaging techniques
Image quality
Animals
Calibration
Detectors
Monte Carlo simulation

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Tianyu, M., Yao, R., & Shao, Y. (2007). Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET. In 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC (Vol. 6, pp. 4285-4288). [4437063] https://doi.org/10.1109/NSSMIC.2007.4437063

Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET. / Tianyu, Ma; Yao, Rutao; Shao, Yiping.

2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC. Vol. 6 2007. p. 4285-4288 4437063.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tianyu, M, Yao, R & Shao, Y 2007, Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET. in 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC. vol. 6, 4437063, pp. 4285-4288, 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC, Honolulu, HI, United States, 10/27/07. https://doi.org/10.1109/NSSMIC.2007.4437063
Tianyu M, Yao R, Shao Y. Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET. In 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC. Vol. 6. 2007. p. 4285-4288. 4437063 https://doi.org/10.1109/NSSMIC.2007.4437063
Tianyu, Ma ; Yao, Rutao ; Shao, Yiping. / Determination of geometrical parameters for slit-slat SPECT imaging on MicroPET. 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC. Vol. 6 2007. pp. 4285-4288
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