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Investigation of Collimator Influential Parameter on SPECT Image Quality: a Monte Carlo Study.

Banari Bahnamiri Sh - J Biomed Phys Eng (2015)

Bottom Line: Because if image quality is low, the possibility of making a mistake in diagnosing and treating the patient will rise.The results of the experimental measurments and simulation calculations revealed a relative difference of less than 5% leading to the confirmation of the accuracy of conducted simulation MCNP code calculation.This is the first essential step in the design and modelling of new collimators used for creating high quality images in nuclear medicine.

View Article: PubMed Central - PubMed

Affiliation: Assistant Professor of Nuclear Physics, Tabari University of Babol, Iran;

ABSTRACT

Background: Obtaining high quality images in Single Photon Emission Tomography (SPECT) device  is the most important goal in nuclear medicine. Because if image quality is low, the possibility of making a mistake in diagnosing and treating the patient will rise. Studying effective factors in spatial resolution of imaging systems is thus deemed to be vital. One of the most important factors in SPECT imaging in nuclear medicine is the use of an appropriate collimator for a certain radiopharmaceutical feature in order to create the best image as it can be effective in the quantity of Full Width at Half Maximum (FWHM) which is the main parameter  in spatial resolution.

Method: In this research, the simulation of the detector and collimator of SPECT imaging device, Model HD3 made by Philips Co. and the investigation of important factors on the collimator were carried out using MCNP-4c code.

Results: The results of the experimental measurments and simulation calculations revealed a relative difference of less than 5% leading to the confirmation of the accuracy of conducted simulation MCNP code calculation.

Conclusion: This is the first essential step in the design and modelling of new collimators used for creating high quality images in nuclear medicine.

No MeSH data available.


Different Values of FWHM according to Distance from 140 keV and 511 keV Sources to Collimator
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Figure 3: Different Values of FWHM according to Distance from 140 keV and 511 keV Sources to Collimator

Mentions: Continuing code assessment with experimental results, different values of FWHM for different distances from the source (140 keV) to the collimator were examined. Both linear and point sources in computational method, and the linear source in experimental one were placed at distances of 100 mm, 120 mm, 140 mm, 160 mm, 180 mm and 200 mm. Results are shown in figure 2. Moreover, the values of FWHM for different distances from the source 511 keV to the collimator were examined by the code. In computational method, both linear and point sources were placed at distances of 100 mm, 120 mm, 140 mm, 160 mm, 180 mm and 200 mm. The results are indicated in figure 3 along with identical values for the source 140 keV.


Investigation of Collimator Influential Parameter on SPECT Image Quality: a Monte Carlo Study.

Banari Bahnamiri Sh - J Biomed Phys Eng (2015)

Different Values of FWHM according to Distance from 140 keV and 511 keV Sources to Collimator
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4417619&req=5

Figure 3: Different Values of FWHM according to Distance from 140 keV and 511 keV Sources to Collimator
Mentions: Continuing code assessment with experimental results, different values of FWHM for different distances from the source (140 keV) to the collimator were examined. Both linear and point sources in computational method, and the linear source in experimental one were placed at distances of 100 mm, 120 mm, 140 mm, 160 mm, 180 mm and 200 mm. Results are shown in figure 2. Moreover, the values of FWHM for different distances from the source 511 keV to the collimator were examined by the code. In computational method, both linear and point sources were placed at distances of 100 mm, 120 mm, 140 mm, 160 mm, 180 mm and 200 mm. The results are indicated in figure 3 along with identical values for the source 140 keV.

Bottom Line: Because if image quality is low, the possibility of making a mistake in diagnosing and treating the patient will rise.The results of the experimental measurments and simulation calculations revealed a relative difference of less than 5% leading to the confirmation of the accuracy of conducted simulation MCNP code calculation.This is the first essential step in the design and modelling of new collimators used for creating high quality images in nuclear medicine.

View Article: PubMed Central - PubMed

Affiliation: Assistant Professor of Nuclear Physics, Tabari University of Babol, Iran;

ABSTRACT

Background: Obtaining high quality images in Single Photon Emission Tomography (SPECT) device  is the most important goal in nuclear medicine. Because if image quality is low, the possibility of making a mistake in diagnosing and treating the patient will rise. Studying effective factors in spatial resolution of imaging systems is thus deemed to be vital. One of the most important factors in SPECT imaging in nuclear medicine is the use of an appropriate collimator for a certain radiopharmaceutical feature in order to create the best image as it can be effective in the quantity of Full Width at Half Maximum (FWHM) which is the main parameter  in spatial resolution.

Method: In this research, the simulation of the detector and collimator of SPECT imaging device, Model HD3 made by Philips Co. and the investigation of important factors on the collimator were carried out using MCNP-4c code.

Results: The results of the experimental measurments and simulation calculations revealed a relative difference of less than 5% leading to the confirmation of the accuracy of conducted simulation MCNP code calculation.

Conclusion: This is the first essential step in the design and modelling of new collimators used for creating high quality images in nuclear medicine.

No MeSH data available.