کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1833561 1027551 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feasibility study of a γ-ray detector based on square PSPMT array for breast cancer imaging
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Feasibility study of a γ-ray detector based on square PSPMT array for breast cancer imaging
چکیده انگلیسی

Although gamma cameras have emerged in the 1960s, their spatial resolution is still not sufficient to detect small tracer concentration abnormalities. Examinations like mammo-scintigraphy requires high spatial resolution and then the possibility to position the detector as close to the explored organ as possible.Diagnostic accuracy in nuclear medicine imaging has seen a notable advancement with the emergence of the new position-sensitive photomultiplier tube (PSPMT). This component allows to develop a compact gamma detector which fulfils these requirements.This study investigates the feasibility and the characteristics of a medium field of view high spatial resolution gamma ray detector based on R8520 PSPMT array coupled to a pixelated NaI(Tl) crystal array.As first results, a photocathode uniformity variation of 1–3 was observed on the whole field of view. Energy resolution obtained is better than 10% FWHM at 140 keV in PSPMT centers. Concerning spatial linearity, it depends on the uniformity of the PSPMT used. Consequently, it will be necessary to develop linearity and energy correction methods.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 557, Issue 2, 15 February 2006, Pages 537–543
نویسندگان
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