| Autor: |
SAYAH, MOHANNAD ADEL, KABIR, NORLAILI AHMAD, JAAFAR, MOHAMMAD SUHAIMI |
| Předmět: |
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| Zdroj: |
International Journal of Applied & Physical Sciences; Jul2017, Vol. 3 Issue 2, p37-41, 5p |
| Abstrakt: |
It is important to quantify the uniformity of pixel intensity in myocardial SPECT images at varied tomographic slices. Distribution of pixel densities in SPECT images mirrored the distribution of radionuclide tracer within target organs. Non-uniformity of pixel intensities in SPECT image may lead to incorrect diagnosis of myocardial infarction. Myocardial phantom positioning is one of the many reasons that affect pixel intensity distribution. In this research work, the fabricated Myocardial phantoms were used to mimic myocardial wall at end diastole and end systole. These phantoms were separately placed at four different positions on the imaging table. The purpose of this study was to quantitatively determine the pixel intensity distribution of the reconstructed myocardial SPECT images, and its relation to phantom positioning on the imaging table. Results show non-uniformity of pixel intensity of SPECT short axis image whether the myocardial phantom was end diastole or end systole. The non-uniformity was not significant, when reconstructed SPECT images of both stages were compared. This non-uniformity became significant (p<0.05, sigma plot) with increasing position of both myocardial phantom stages. In addition, non-uniformity became in big degree in an inferior segment more than segment in: septal, anterior, and lateral particularly, when the myocardial phantoms were positioned at 15 cm off-center. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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