1382/9/23، جلد ۱۱، شماره ۲، صفحات ۱۳-۱۷
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Qualitative evaluation of Chang method of attenuation correction on heart SPECT by using custom made heart phantom
چکیده انگلیسی مقاله SPECT detects γ-rays from administered radiopharmaceutical within the patient body. γ-rays pass through different tissues before reaching detectors and are attenuated. Attenuation can cause artifacts; therefore different methods are used to minimize attenuation effects. In our study efficacy of Chang method was evaluated for attenuation purpose, using a custom made heart phantom. Due to different tissues surrounding heart, attenuation is not uniform more over activity distribution around heart is also non-uniform. In Chang method, distribution of radioactivity and attenuation due to the surrounding tissue is considered uniform. Our phantom is a piece of plastic producing similar SPECT image as left ventricle. A dual head, ADAC system was used in our study. Images were taken by 180° (Limited angle) and 360° (Total rotation). Images are compared with and without attenuation correction. Our results indicate that Chang attenuation correction method is not capable of eliminating attenuation artifact completely in particular attenuation effects caused by breast.
کلیدواژه‌های انگلیسی مقاله Iran, meta-analysis, trend of infertilityGated myocardial perfusion SPECT, Quantification, segmental scoring, Meckel’s scan, Meckel’s diverticulum, Gastrointestinal bleeding, Technetium Pertechnetate scintigraphy, Thiosemicarbazone, 191Os, Radiolabeling, Biodistribution, RBBB, Myocardial perfusion, Gated SPECT, Coronary artery disease, Effective dose, Nuclear medicine procedures, Collective effective dose, Tc99m MIBI parathyroid scintigraphy, Myocardium perfusion gated SPECT, Parathyroid adenoma, Skeletal scintigraphy, Fluid restriction, Tc-99m MDP, Image quality, Bone to soft tissue ratio, Radiology, Nuclear medicine, Medical imaging, Bibliometric study, Iran, Hyperthyroidism, Radioactive iodine, Sexual hormones, Semen analysis, Attenuation correction, Artifact, Color intensity, SPECT,
نویسندگان مقاله 30760---30761---30762---30763---30764---30765---
نشانی اینترنتی http://irjnm.tums.ac.ir/pdf_427_c9f662bacd0376a3f3a411dca8de251f.html
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زبان مقاله منتشر شده eng
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نوع مقاله منتشر شده Original Articles
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