Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging

In SPECT imaging, the presence of the scattered events in projection data affects the overall quality of the image as well as the quantification of the radioactivity distribution. In this study, material filter method has been employed in the attempt of reducing the influence of scatter events...

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Main Author:	Vee, Fong Shu
Format:	Thesis
Language:	English
Published:	2004
Subjects:	R Medicine
Online Access:	http://eprints.usm.my/44154/1/LI...Fong%20Shu%20Tee...2004...-24%20pages.pdf
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id	my-usm-ep.44154
record_format	uketd_dc
spelling	my-usm-ep.441542020-10-22T03:03:26Z Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging 2004 Vee, Fong Shu R Medicine In SPECT imaging, the presence of the scattered events in projection data affects the overall quality of the image as well as the quantification of the radioactivity distribution. In this study, material filter method has been employed in the attempt of reducing the influence of scatter events in the measured counts. Such a filter decreases the relative contribution of scattered gammas by preferentially removing them before they can reach the surface of the detector of the gamma camera. The material filters used are copper (Cu) sheet 0.125mm thick and aluminium (AI) sheet 0.2mm thick. Filters are separately mounted on the face of a gamma camera (GCA-901 A/HG) with either low energy general purpose (LEGP) or low energy high resolution (LEHR) collimators. SPECT images of the insert simulating 'hot' lesions in cold background, linearity and the uniform section of the Carlson phantom loaded with Tc-99m are obtained without and with material filter. The performance of the tomographic system is explored via the uniformity, sensitivity and linearity measurements, as well as the image lesi9n (hot) contrast, signal-to-noise ratio, standard deviation and percent root mean square noise (PRMSN). From the results, material filtered data shows an improvement in all tested parameters at the cost of system sensitivity. 2004 Thesis http://eprints.usm.my/44154/ http://eprints.usm.my/44154/1/LI...Fong%20Shu%20Tee...2004...-24%20pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Kesihatan
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	R Medicine
spellingShingle	R Medicine Vee, Fong Shu Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
description	In SPECT imaging, the presence of the scattered events in projection data affects the overall quality of the image as well as the quantification of the radioactivity distribution. In this study, material filter method has been employed in the attempt of reducing the influence of scatter events in the measured counts. Such a filter decreases the relative contribution of scattered gammas by preferentially removing them before they can reach the surface of the detector of the gamma camera. The material filters used are copper (Cu) sheet 0.125mm thick and aluminium (AI) sheet 0.2mm thick. Filters are separately mounted on the face of a gamma camera (GCA-901 A/HG) with either low energy general purpose (LEGP) or low energy high resolution (LEHR) collimators. SPECT images of the insert simulating 'hot' lesions in cold background, linearity and the uniform section of the Carlson phantom loaded with Tc-99m are obtained without and with material filter. The performance of the tomographic system is explored via the uniformity, sensitivity and linearity measurements, as well as the image lesi9n (hot) contrast, signal-to-noise ratio, standard deviation and percent root mean square noise (PRMSN). From the results, material filtered data shows an improvement in all tested parameters at the cost of system sensitivity.
format	Thesis
qualification_level	Master's degree
author	Vee, Fong Shu
author_facet	Vee, Fong Shu
author_sort	Vee, Fong Shu
title	Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
title_short	Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
title_full	Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
title_fullStr	Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
title_full_unstemmed	Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging
title_sort	uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (cu 0.125mm and ai 0.2mm) with tc-99m inspect imaging
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Kesihatan
publishDate	2004
url	http://eprints.usm.my/44154/1/LI...Fong%20Shu%20Tee...2004...-24%20pages.pdf
_version_	1747821335570022400

Uniformity, sensitivity, linearity, and hot region image analysis by employing unconventional filter technique (Cu 0.125mm and AI 0.2mm) with Tc-99m inSPECT imaging

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