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Comparison of the detectability of hot lesions on bone SPECT using six state-of-the-art SPECT/CT systems: a multicenter phantom study to optimize reconstruction parameters.
Ichikawa, Hajime; Shibutani, Takayuki; Matsutake, Yuki; Kato, Toyohiro; Ikematsu, Ryuji; Higashi, Riwa; Kamiya, Takashi; Shimada, Hideki; Onoguchi, Masahisa.
Affiliation
  • Ichikawa H; Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan.
  • Shibutani T; Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 9200942, Japan.
  • Matsutake Y; Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 9200942, Japan.
  • Kato T; Department of Radiology, Kurume University Hospital, Kurume, Japan.
  • Ikematsu R; Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan.
  • Higashi R; Department of Radiology, Kurume University Hospital, Kurume, Japan.
  • Kamiya T; Department of Radiology, Aichi Medical University, Nagakute, Japan.
  • Shimada H; Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Japan.
  • Onoguchi M; Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan.
Phys Eng Sci Med ; 46(2): 839-849, 2023 Jun.
Article in En | MEDLINE | ID: mdl-37126151
Single-photon emission computed tomography with X-ray computed tomography (SPECT/CT) systems have diversified due to the remarkable developments made by each manufacturer. This study aimed to optimize the reconstruction parameters of six state-of-the-art SPECT/CT systems and compare their image quality of bone SPECT. SPECT images were acquired on SPECT/CT systems, including Symbia Intevo, Discovery NM/CT 670, Discovery NM/CT 870 CZT, Brightview XCT, and VERITON-CT. SIM2 bone phantom with tough lung phantoms on both sides of the spinal inserts that simulate the thorax was used for image quality assessment. SPECT images were obtained at individual workstations using an ordered subset expectation maximization method with three-dimensional resolution recovery, as well as CT attenuation and scatter correction, subset 2, iteration 12-84, and a full width at half maximum 10-mm Gaussian smooth filter. An automatic image analysis software dedicated to SIM2 bone phantom was used to assess the contrast-to-noise ratio (CNR), relative recovery coefficient, percentage of coefficient of variance, contrast, and detectability. The optimal parameters for each system were defined with superior detectability of spherical lesions and noise characteristics, as well as the highest CNR. All systems exhibited better image quality indexes using the optimal parameters than using the manufacturer's recommended parameters. The detectability of all systems was in agreement while using the optimal parameters. Detectability agreement can be achieved by optimizing the reconstruction parameters for different reconstruction algorithms, which can further improve the image quality. Therefore, future research should focus on optimal reconstruction parameters for SPECT alone.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Tomography, Emission-Computed, Single-Photon / Single Photon Emission Computed Tomography Computed Tomography Type of study: Clinical_trials Language: En Journal: Phys Eng Sci Med Year: 2023 Document type: Article Affiliation country: Japan Country of publication: Switzerland

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Tomography, Emission-Computed, Single-Photon / Single Photon Emission Computed Tomography Computed Tomography Type of study: Clinical_trials Language: En Journal: Phys Eng Sci Med Year: 2023 Document type: Article Affiliation country: Japan Country of publication: Switzerland