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Hasegawa D, Iguchi T, Takatani M, Tokunaga K, Minoda T, Miyai M. Effect of single-photon emission computed tomography acquisition method and sampling angles on image quality and quantitative accuracy in xSPECT-reconstructed images. Nucl Med Commun 2024:00006231-990000000-00323. [PMID: 39101326 DOI: 10.1097/mnm.0000000000001883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
OBJECTIVE The aim of this study was to evaluate the effects of the single-photon emission computed tomography (SPECT) acquisition method and sampling angles on the qualitative and quantitative interpretations of xSPECT-reconstructed images. METHODS The spatial resolution was evaluated using a JSP phantom, and the uniformity and quantitative accuracy were verified with a NEMA IEC Body Phantom using an SIEMENS Symbia Intevo SPECT/computed tomography system. SPECT was performed using three acquisition methods (step-and-shoot, continuous, and acquire during the step), and the sampling angles were set to 2, 3, 4, 5, and 6°. The xSPECT-reconstruction technology which is used with ordered subset-conjugated gradient minimization was used for image reconstruction. RESULTS Full width of half maximum, an evaluation index of spatial resolution, varied up to 2.73 mm with different sampling angles and up to 2.06 mm with different acquisition methods. Uniformity, as assessed by the coefficient of variation, improved with increasing sampling angles. The accuracy of the quantification of the hot sphere showed an error rate of approximately 10% depending on the sampling angle, and an error rate of approximately 5% depending on the different acquisition methods. CONCLUSIONS In xSPECT-reconstructed images, the difference in sampling angle has a greater impact on image quality and quantitativity than the difference in the acquisition method. For tests in which uniformity is important, a larger sampling angle is recommended.
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Affiliation(s)
- Daisuke Hasegawa
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama
- Department of Radiological Technology, Faculty of Health Science, Kobe Tokiwa University, Kobe
| | - Toshihiro Iguchi
- Department of Radiological Technology, Faculty of Health Sciences, Okayama University
| | - Masayasu Takatani
- Department of Radiological Technology, Okayama Saiseikai General Hospital
| | - Kotaro Tokunaga
- Department of Radiological Technology, Faculty of Health Science, Kobe Tokiwa University, Kobe
| | - Takuma Minoda
- Department of Radiological Technology, Faculty of Health Science, Kobe Tokiwa University, Kobe
| | - Masahiro Miyai
- Department of Radiological Technology, Graduate School of Health Sciences, Okayama University, Okayama
- Department of Radiology, Kawasaki Medical School General Medical Center, Okayama, Japan
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Ichikawa H, Shibutani T, Matsutake Y, Kato T, Ikematsu R, Higashi R, Kamiya T, Shimada H, Onoguchi M. 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. Phys Eng Sci Med 2023; 46:839-849. [PMID: 37126151 DOI: 10.1007/s13246-023-01257-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 04/10/2023] [Indexed: 05/02/2023]
Abstract
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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Affiliation(s)
- Hajime Ichikawa
- Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 9200942, Japan
| | - Takayuki Shibutani
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 9200942, Japan
| | - Yuki Matsutake
- Department of Radiology, Kurume University Hospital, Kurume, Japan
| | - Toyohiro Kato
- Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Ryuji Ikematsu
- Department of Radiology, Kurume University Hospital, Kurume, Japan
| | - Riwa Higashi
- Department of Radiology, Aichi Medical University, Nagakute, Japan
| | - Takashi Kamiya
- Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Japan
| | - Hideki Shimada
- Department of Radiology, Toyohashi Municipal Hospital, Toyohashi, Japan
| | - Masahisa Onoguchi
- Department of Quantum Medical Technology, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 9200942, Japan.
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Konishi T. [[SPECT] 4. Introductions of SPECT Reconstruction Algorithm Using the Conjugated Gradient Method and Metal Artifact Reduction Technologies in the Latest SPECT System]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2022; 78:895-901. [PMID: 35989260 DOI: 10.6009/jjrt.2022-2075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
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Ichikawa H. [[Nuclear Medicine] 4. Phantom Studies in Oncology]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2022; 78:637-645. [PMID: 35718453 DOI: 10.6009/jjrt.2022-2038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Hajime Ichikawa
- Department of Radiology, Toyohashi Municipal Hospital
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
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Chen EJ, Safwan Selvam HS, Tan TH, Chew MT. Quantitative analysis of xQuant reconstruction algorithm in SPECT/CT. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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