|
|
International Journal of Radiation Research، جلد ۱، شماره ۴، صفحات ۲۰۵-۲۱۰
|
|
|
| عنوان فارسی |
|
|
| چکیده فارسی مقاله |
|
|
| کلیدواژه‌های فارسی مقاله |
|
|
| عنوان انگلیسی |
Determination of optimum filter in myocardial SPECT: A phantom study |
|
| چکیده انگلیسی مقاله |
Background: In myocardial perfusion SPECT imaging, images are degraded by photon attenuation, the distance-dependent collimator, detector response and photons scatter. Filters greatly affect quality of nuclear medicine images Materials and Methods: A phantom simulating heart left ventricle was built. About 1mCi of 99mTc was injected into the phantom. Images were taken from this phantom. Some filters including Parzen, Hamming, Hanning, Butterworth and Gaussian were exerted on the phantom images. By defining some criteria such as contrast, signal to noise ratio, and defect size detectability, the best filter can be determined. Results : 0.325 Nyquist frequency and 0.5 Nq was obtained as the optimum cut off frequencies respectively for hamming and hanning filters. Order 11 ,cut off 0.45 Nq and order 20 cut off 0.5 Nq obtained optimum respectively for Butterworth and Gaussian filters. Conclusion : The optimum member of every filter’s family was obtained. Iran . J. Radiat. Res., 2004 1(4): 205-210 |
|
| کلیدواژه‌های انگلیسی مقاله |
phantom, filter |
|
| نویسندگان مقاله |
a تکاور | a takavar
department of medical physics, tehran university of medical sciences,tehran, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)
gh شمسی پور | gh shamsipour
m سهرابی | m sohrabi
مهدی افتخاری | m eftekhari
|
|
| نشانی اینترنتی |
http://www.ijrr.com/browse.php?a_code=A-10-1-31&slc_lang=en&sid=en |
| فایل مقاله |
فایلی برای مقاله ذخیره نشده است |
| کد مقاله (doi) |
|
| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
Radiation Biology |
| نوع مقاله منتشر شده |
تحقیق بدیع |
|
|
|
برگشت به:
صفحه اول پایگاه |
نسخه مرتبط |
نشریه مرتبط |
فهرست نشریات
|