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Technical Developments |
1 From the Montreal Neurological Institute (K.M., C.J.T., J.L.R.), Medical Physics Unit (M.A., A.M.B., C.J.T.), and the Departments of Nuclear Medicine (R.L.), Surgical Oncology (A.L.), and Radiology (J.H.G.), the Royal Victoria Hospital, McGill University, 3801 University St, Rm 798, Montreal, Quebec H3A 2B4, Canada. Received September 29, 1998; revision requested December 23; final revision received August 4, 1999; accepted August 11. Supported in part by the National Cancer Institute of Canada, Canadian Breast Cancer Research Institute grant 6139. Address reprint requests to K.M. (e-mail: kavita@bic.mni.mcgill.ca).
Performance characteristics of a positron emission mammographic (PEM) instrument were studied. This dedicated metabolic breast imaging system has spatial resolution of 2.8-mm full width at half maximum (FWHM), coincidence resolving time of 12-nsec FWHM, and absolute efficiency of 3%. Hot spots with diameter of 16 mm in a phantom with signal-to-background activity ratio of 6:1 were distinguishable with a scanning time of 5 minutes.
Index terms: Breast radiography, technology, 00.1219
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