The performance of a multiwire proportional chamber positron camera for clinical use

P. K. Marsden, R. J. Ott, J. E. Bateman, Simon R Cherry, M. A. Flower, S. Webb

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The Rutherford Appleton Laboratory clinical positron camera consists of two opposed multiwire proportional chambers (MWPCs) mounted on a rotating gantry capable of performing routine nuclear medicine studies. The system has operated since the end of 1986 with complete reliability. It has a sensitivity of 37 kcps MBq-1 cm3 per axial cm for a 20 cm diameter uniformly filled cylinder of activity. The best spatial resolution obtainable is about 6 mm, although in practice images are smoothed in order to reduce statistical noise with a corresponding decrease in resolution. Cross-plane rays are utilised during image reconstruction and the resulting three-dimensional images exhibit the same spatial resolution in three orthogonal directions over a large cylindrical field of view 15 cm high by 30 cm in diameter. The maximum data-taking rate is limited to 1.5 to 2 kcps at present due to deadtime in the read-out system. The performance of the system is described with particular reference to the problems of imaging with the large fractions of random and scattered events which are a consequence of using large-area detectors. Images of phantoms and patients are presented and proposed modifications to the camera are described.

Original languageEnglish (US)
Article number007
Pages (from-to)1043-1062
Number of pages20
JournalPhysics in Medicine and Biology
Volume34
Issue number8
DOIs
StatePublished - 1989
Externally publishedYes

Fingerprint

Computer-Assisted Image Processing
Three-Dimensional Imaging
Nuclear Medicine
Positrons
positrons
chambers
Cameras
cameras
Clinical laboratories
Electrons
Nuclear medicine
spatial resolution
Image reconstruction
gantry cranes
nuclear medicine
image reconstruction
Detectors
Imaging techniques
field of view
rays

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Physics and Astronomy (miscellaneous)
  • Biomedical Engineering

Cite this

The performance of a multiwire proportional chamber positron camera for clinical use. / Marsden, P. K.; Ott, R. J.; Bateman, J. E.; Cherry, Simon R; Flower, M. A.; Webb, S.

In: Physics in Medicine and Biology, Vol. 34, No. 8, 007, 1989, p. 1043-1062.

Research output: Contribution to journalArticle

Marsden, P. K. ; Ott, R. J. ; Bateman, J. E. ; Cherry, Simon R ; Flower, M. A. ; Webb, S. / The performance of a multiwire proportional chamber positron camera for clinical use. In: Physics in Medicine and Biology. 1989 ; Vol. 34, No. 8. pp. 1043-1062.
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