Assessment of the scatter correction procedures in single photon emission computed tomography imaging using simulation and clinical study

Rafati, Mehravar; Rouhani, Hemmatollah; Rajabi, Ahmad Bitarafan; Noori-Asl, Mahsa; Farhood, Bagher; Ahangari, Hadi Taleshi

doi:10.4103/jcrt.jcrt_1085_16

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Most of these studies are related to the imaging with the radioisotope of technetium-99m. [ 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ] There are a few studies for other radioisotopes. In this study, we intend to investigate and compare the influence of four scatter correction approximations on the quality of In-111 SPECT images.…”

Section: Introductionmentioning

confidence: 99%

Assessment of four scatter correction methods in In-111 SPECT imaging: A simulation study

Noori-Asl

2020

J Med Phys

Self Cite

View full text Add to dashboard Cite

Introduction: Detection of compton scattered photons is one of the most important factors affecting the quality of single-photon emission computed tomography (SPECT) images. In most cases, the multiple-energy window acquisition methods are used for estimation of the scatter contribution into the main energy window(s) used in imaging. Aims and Objectives: The purpose of this study is to evaluate and compare the performance of four different scatter correction methods in In-111 SPECT imaging. Due to the lack of sufficient studies in this field, it can be useful to perform a more detailed and comparative study. Materials and Methods: Four approximations for scatter correction of In-111 SPECT images are evaluated by using the Monte Carlo simulation. These methods are firstly applied on each of photopeak windows, separately. Then, the effect of the correction methods is investigated by considering both the photopeak windows. The images obtained from a simulated multiple-spheres phantom are used for the evaluation of the correction methods by using three assessment criteria, including the image contrast, relative noise, and the recovery coefficient. Results: The results of this study show that the correction methods, when using the single photopeak windows, result in increase in image contrast with a significant level of noise. In return, when both the photopeak energy windows are used for imaging, it is possible to achieve the better image characteristics. Conclusion: The use of the proposed correction methods, by considering both the photopeak windows, leads to improve the image contrast with a reasonable level of image noise.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessment of four scatter correction methods in In-111 SPECT imaging: A simulation study

Noori-Asl

2020

J Med Phys

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 19 ] The validation of the SIMIND program for SPECT imaging has been verified for different gamma-camera according to the previous studies. [ 20 21 22 23 24 ]…”

Section: Methodsmentioning

confidence: 99%

Optimization of scatter correction method in samarium-153 single-photon emission computed tomography using triple-energy window: A monte carlo simulation study

et al. 2020

View full text Add to dashboard Cite

Purpose: In single-photon emission computed tomography imaging, the presence of scatter degrades image quality. The goal of this study is to optimize the main- and sub-energy windows for triple-energy window (TEW) method using Monte Carlo SImulating Medical Imaging Nuclear Detectors (SIMIND) code for samarium-153 (Sm-153) imaging. Materials and Methods: The comparison is based on the Monte Carlo simulation data with the results estimated using TEW method. Siemens Symbia gamma-camera equipped with low-energy high-resolution collimator was simulated for Sm-153 point source located in seven positions in water cylindrical phantom. Three different main-energy window widths (10%, 15%, and 20%) and three different sub-energy window widths (2, 4, and 6 keV) were evaluated. We compared the true scatter fraction determined by SIMIND and scatter fraction estimated using TEW scatter correction method at each position. In order to evaluate the image quality, we used the full width at half maximum (FWHM) computed on the PSF and image contrast using Jaszczak phantom. Results: The scatter fraction using TEW method is similar to the true scatter fraction for 20% of the main-energy window and 6 keV sub-energy windows. For these windows, the results show that the resolution and contrast were improved. Conclusion: TEW method could be a useful scatter correction method to remove the scatter event in the image for Sm-153 imaging.

show abstract

Investigation of different factors affecting the quality of spect images: A simulation study

Noori-Asl

2020

J Med Phys

View full text Add to dashboard Cite

Assessment of the scatter correction procedures in single photon emission computed tomography imaging using simulation and clinical study

Abstract: The simulation and the clinical studies showed that the new approach could be better performance than DEW, TEW methods, according to values of the contrast, and the SNR for scatter correction.

Cited by 3 publications

References 0 publications

Assessment of four scatter correction methods in In-111 SPECT imaging: A simulation study

Assessment of four scatter correction methods in In-111 SPECT imaging: A simulation study

Optimization of scatter correction method in samarium-153 single-photon emission computed tomography using triple-energy window: A monte carlo simulation study

Investigation of different factors affecting the quality of spect images: A simulation study

Contact Info

Product

Resources

About