295. Optimized prefiltering parameter for scatter subtraction by triple energy window method
نویسندگان
چکیده
منابع مشابه
Determination of the Energy Windows for the Triple Energy Window Scatter Correction Method in Gadolinium-159 Single Photon Emission Computed Tomography Using Monte Carlo Simulation
Introduction: In radionuclide imaging, object scatter is one of the major factors leading to image quality degradation. Therefore, the correction of scattered photons might have a great impact on improving the image quality. Regarding this, the present study aimed to determine the main and sub-energy windows for triple energy window (TEW) scatter correction method usin...
متن کاملA modification of the dual energy window subtraction method for scatter compensation in pixelized scintillators for SPECT
Small field of view detectors based on Position Sensitive Photomultiplier Tubes (PSPMTs) have been widely used by many research groups in small-animal imaging and recently clinically in scintimammography. In most cases the PSPMT is coupled to pixelized scintillators since it has been shown that their use improves spatial resolution. The use of a single energy window for each crystal element is ...
متن کاملOptimized energy window configuration for 201Tl imaging.
UNLABELLED A poor signal-to-noise ratio attributable to a low injected dose of thallium and the presence of scattered photons are the major impediments in the use of thallium as an imaging agent. Thallium decays in a complicated way and emits photons in a wide range of energies (68-82 keV). To increase the ratios of primary photons to scatter photons (primary-to-scatter ratios) and possibly inc...
متن کامل[Scatter correction in myocardial thallium SPECT: needs for optimization of energy window settings in the energy window-based scatter correction techniques].
Accuracy and limitation of energy-window based scatter correction techniques have been evaluated for myocardial 201Tl SPECT by means of Monte Carlo simulation. In particular, projection view-dependency of energy distribution of the scattered photons was evaluated. Two geometrical configurations were simulated: namely a homogeneous cylindrical radioactivity located asymmetrically in a homogeneou...
متن کاملFIR prefiltering improves Prony's method
Prony's method is a technique for determining the parameters of sinusoidal signals. It is known to be very sensitive to measurement errors in the observed signal samples. In this correspondence, we present two new prefiltering methods that improve the performance of Prony's method. The simple prefiltering operation reduces the effects of noise in the data without violating the fundamental prope...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1994
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003326095