Fluctuation of quantitative values on acquisition time and the reconstruction conditions in 99mTc-SPECT

Masakazu Tsujimoto, Seiji Shirakawa, Atsushi Teramoto, Masanobu Ishiguro, Kazuhisa Nakane, Yoshihiro Ida, Hiroshi Toyama

Research output: Contribution to journalArticle

Abstract

Objective This study aims to carry out a quantitative analysis with high reproducibility using single-photon emission computed tomography/computed tomography (SPECT/CT); we investigated the optimum parameters for the acquisition and the reconstruction. Materials and methods SPECT images were acquired with varying time per view using SPECT phantom (JS-10) and the body phantom of National Electrical Manufacturers Association and International Electrotechnical Commission (Body-phantom), respectively. For the image reconstruction condition, we changed the product of subset and iteration (SI product) and the Gaussian filter using a threedimensional ordered subset expectation maximization. A combination of no scattering correction and no attenuation correction (SC-/AC-) and a combination of scattering correction and attenuation correction by CT images (SC+/AC+) were performed. The dose linearity, the recovery coefficient, the scatter ratio, and the coefficient of variation were evaluated using JS-10. Using Body-phantom, contrast-to-noise ratios of the hot spheres (13, 17mm) were calculated. Moreover, the change in the maximum standardized uptake value (SUVmax) and the average SUV (SUVmean) were evaluated for each sphere. Result From the evaluation results using the JS-10, dose linearity, recovery coefficient, scatter ratio, and coefficient of variation were all good when time per view was 50-150 s, the Gaussian filter was 8-12 mm, and the SI product was 150. From the evaluation results using Body-phantom, comparing the Gaussian filter with 8mm and 12 mm, the contrast-to-noise ratio was better for 12mm and the error rate to the change of the scan-time was up to 3.7%. However, SUVmax and SUVmean using 8mm were closer to the design value of the phantom. Conclusion It is necessary that Quantitative SPECT be acquired at 50 s or more per view per detection, reconstructed using a three-dimensional ordered subset expectation maximization with SC+/AC+, the SI product is 150 times, and the Gaussian Filter is 8-12mm. This suggested that the quantitative analysis would be carried out with good reproducibility.

Original languageEnglish
Pages (from-to)601-609
Number of pages9
JournalNuclear Medicine Communications
Volume39
Issue number7
DOIs
Publication statusPublished - 01-01-2018

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Single-Photon Emission-Computed Tomography
Noise
Computer-Assisted Image Processing

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Cite this

Tsujimoto, Masakazu ; Shirakawa, Seiji ; Teramoto, Atsushi ; Ishiguro, Masanobu ; Nakane, Kazuhisa ; Ida, Yoshihiro ; Toyama, Hiroshi. / Fluctuation of quantitative values on acquisition time and the reconstruction conditions in 99mTc-SPECT. In: Nuclear Medicine Communications. 2018 ; Vol. 39, No. 7. pp. 601-609.
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abstract = "Objective This study aims to carry out a quantitative analysis with high reproducibility using single-photon emission computed tomography/computed tomography (SPECT/CT); we investigated the optimum parameters for the acquisition and the reconstruction. Materials and methods SPECT images were acquired with varying time per view using SPECT phantom (JS-10) and the body phantom of National Electrical Manufacturers Association and International Electrotechnical Commission (Body-phantom), respectively. For the image reconstruction condition, we changed the product of subset and iteration (SI product) and the Gaussian filter using a threedimensional ordered subset expectation maximization. A combination of no scattering correction and no attenuation correction (SC-/AC-) and a combination of scattering correction and attenuation correction by CT images (SC+/AC+) were performed. The dose linearity, the recovery coefficient, the scatter ratio, and the coefficient of variation were evaluated using JS-10. Using Body-phantom, contrast-to-noise ratios of the hot spheres (13, 17mm) were calculated. Moreover, the change in the maximum standardized uptake value (SUVmax) and the average SUV (SUVmean) were evaluated for each sphere. Result From the evaluation results using the JS-10, dose linearity, recovery coefficient, scatter ratio, and coefficient of variation were all good when time per view was 50-150 s, the Gaussian filter was 8-12 mm, and the SI product was 150. From the evaluation results using Body-phantom, comparing the Gaussian filter with 8mm and 12 mm, the contrast-to-noise ratio was better for 12mm and the error rate to the change of the scan-time was up to 3.7{\%}. However, SUVmax and SUVmean using 8mm were closer to the design value of the phantom. Conclusion It is necessary that Quantitative SPECT be acquired at 50 s or more per view per detection, reconstructed using a three-dimensional ordered subset expectation maximization with SC+/AC+, the SI product is 150 times, and the Gaussian Filter is 8-12mm. This suggested that the quantitative analysis would be carried out with good reproducibility.",
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Fluctuation of quantitative values on acquisition time and the reconstruction conditions in 99mTc-SPECT. / Tsujimoto, Masakazu; Shirakawa, Seiji; Teramoto, Atsushi; Ishiguro, Masanobu; Nakane, Kazuhisa; Ida, Yoshihiro; Toyama, Hiroshi.

In: Nuclear Medicine Communications, Vol. 39, No. 7, 01.01.2018, p. 601-609.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fluctuation of quantitative values on acquisition time and the reconstruction conditions in 99mTc-SPECT

AU - Tsujimoto, Masakazu

AU - Shirakawa, Seiji

AU - Teramoto, Atsushi

AU - Ishiguro, Masanobu

AU - Nakane, Kazuhisa

AU - Ida, Yoshihiro

AU - Toyama, Hiroshi

PY - 2018/1/1

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N2 - Objective This study aims to carry out a quantitative analysis with high reproducibility using single-photon emission computed tomography/computed tomography (SPECT/CT); we investigated the optimum parameters for the acquisition and the reconstruction. Materials and methods SPECT images were acquired with varying time per view using SPECT phantom (JS-10) and the body phantom of National Electrical Manufacturers Association and International Electrotechnical Commission (Body-phantom), respectively. For the image reconstruction condition, we changed the product of subset and iteration (SI product) and the Gaussian filter using a threedimensional ordered subset expectation maximization. A combination of no scattering correction and no attenuation correction (SC-/AC-) and a combination of scattering correction and attenuation correction by CT images (SC+/AC+) were performed. The dose linearity, the recovery coefficient, the scatter ratio, and the coefficient of variation were evaluated using JS-10. Using Body-phantom, contrast-to-noise ratios of the hot spheres (13, 17mm) were calculated. Moreover, the change in the maximum standardized uptake value (SUVmax) and the average SUV (SUVmean) were evaluated for each sphere. Result From the evaluation results using the JS-10, dose linearity, recovery coefficient, scatter ratio, and coefficient of variation were all good when time per view was 50-150 s, the Gaussian filter was 8-12 mm, and the SI product was 150. From the evaluation results using Body-phantom, comparing the Gaussian filter with 8mm and 12 mm, the contrast-to-noise ratio was better for 12mm and the error rate to the change of the scan-time was up to 3.7%. However, SUVmax and SUVmean using 8mm were closer to the design value of the phantom. Conclusion It is necessary that Quantitative SPECT be acquired at 50 s or more per view per detection, reconstructed using a three-dimensional ordered subset expectation maximization with SC+/AC+, the SI product is 150 times, and the Gaussian Filter is 8-12mm. This suggested that the quantitative analysis would be carried out with good reproducibility.

AB - Objective This study aims to carry out a quantitative analysis with high reproducibility using single-photon emission computed tomography/computed tomography (SPECT/CT); we investigated the optimum parameters for the acquisition and the reconstruction. Materials and methods SPECT images were acquired with varying time per view using SPECT phantom (JS-10) and the body phantom of National Electrical Manufacturers Association and International Electrotechnical Commission (Body-phantom), respectively. For the image reconstruction condition, we changed the product of subset and iteration (SI product) and the Gaussian filter using a threedimensional ordered subset expectation maximization. A combination of no scattering correction and no attenuation correction (SC-/AC-) and a combination of scattering correction and attenuation correction by CT images (SC+/AC+) were performed. The dose linearity, the recovery coefficient, the scatter ratio, and the coefficient of variation were evaluated using JS-10. Using Body-phantom, contrast-to-noise ratios of the hot spheres (13, 17mm) were calculated. Moreover, the change in the maximum standardized uptake value (SUVmax) and the average SUV (SUVmean) were evaluated for each sphere. Result From the evaluation results using the JS-10, dose linearity, recovery coefficient, scatter ratio, and coefficient of variation were all good when time per view was 50-150 s, the Gaussian filter was 8-12 mm, and the SI product was 150. From the evaluation results using Body-phantom, comparing the Gaussian filter with 8mm and 12 mm, the contrast-to-noise ratio was better for 12mm and the error rate to the change of the scan-time was up to 3.7%. However, SUVmax and SUVmean using 8mm were closer to the design value of the phantom. Conclusion It is necessary that Quantitative SPECT be acquired at 50 s or more per view per detection, reconstructed using a three-dimensional ordered subset expectation maximization with SC+/AC+, the SI product is 150 times, and the Gaussian Filter is 8-12mm. This suggested that the quantitative analysis would be carried out with good reproducibility.

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