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 language | English (US) |
|---|---|
| Article number | 007 |
| Pages (from-to) | 1043-1062 |
| Number of pages | 20 |
| Journal | Physics in Medicine and Biology |
| Volume | 34 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1989 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - The performance of a multiwire proportional chamber positron camera for clinical use
AU - Marsden, P. K.
AU - Ott, R. J.
AU - Bateman, J. E.
AU - Cherry, Simon R
AU - Flower, M. A.
AU - Webb, S.
PY - 1989
Y1 - 1989
N2 - 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.
AB - 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.
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U2 - 10.1088/0031-9155/34/8/007
DO - 10.1088/0031-9155/34/8/007
M3 - Article
VL - 34
SP - 1043
EP - 1062
JO - Physics in Medicine and Biology
JF - Physics in Medicine and Biology
SN - 0031-9155
IS - 8
M1 - 007
ER -