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Improvement of image quality for small lesion sizes in 18F-FDG prone breast silicon photomultiplier-based PET/CT imaging

سال انتشار: 1404
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 41

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شناسه ملی سند علمی:

JR_JNMB-13-1_009

تاریخ نمایه سازی: 30 آذر 1403

چکیده مقاله Improvement of image quality for small lesion sizes in 18F-FDG prone breast silicon photomultiplier-based PET/CT imaging

Objective(s): We investigated image quality and standardized uptake values (SUVs) for different lesion sizes using clinical data generated by 18F-FDG-prone breast silicon photomultiplier (SiPM)-based positron emission tomography/computed tomography (PET/CT).Methods: We evaluated the effect of point-spread function (PSF) modeling and Gaussian filtering (Gau) and determined the optimal reconstruction conditions. We compared the signal-to-noise ratio (SNR), contrast, %coefficient of variation (%CV), SUV, and Likert scale score between ordered-subset expectation maximization (OSEM) time-of-flight (TOF) and OSEM+TOF+PSF in phantom and clinical studies. The conventional image was generated with OSEM+TOF_Gau 6 mm. The National Electrical Manufacturers Association body phantom with 10-mm hot sphere data was acquired for 5 min. Twenty-six patients (40 lesions, ranging from 3.7 to 63.0 mm) were examined using prone breast PET/CT with a breast positioner for breast cancer staging. PET data were acquired 125±9.7 min after intravenous injection of 220±16.1 MBq at 5 min/bed.Results: In the phantom study, a high SNR was obtained from a 3- to 5-mm Gaussian filter for OSEM+TOF+PSF. The contrast obtained with OSEM+TOF without Gaussian filtering was superior to that obtained with OSEM+TOF+PSF_Gau 4 mm. In the clinical study, the image quality depended on lesion size. The average SNR was significantly higher at 40.8% for lesions >20 mm with OSEM+TOF_Gau 6 mm than with OSEM+TOF without Gaussian filtering. The average contrast for lesions ≤10 mm was significantly higher by 42.0% with OSEM+TOF without Gaussian filtering than with OSEM+TOF_Gau 6 mm. The average SUVmax of OSEM+TOF without Gaussian filtering significantly increased by 53.3% for lesions ≤10 mm.Conclusion: OSEM+TOF without Gaussian filtering provided good contrast and quantitative value for small lesions.

کلیدواژه های Improvement of image quality for small lesion sizes in 18F-FDG prone breast silicon photomultiplier-based PET/CT imaging:

نویسندگان مقاله Improvement of image quality for small lesion sizes in 18F-FDG prone breast silicon photomultiplier-based PET/CT imaging

Nobuhiro Yada

Department of Radiology, Shimane University Hospital, Izumo, Japan

Hiroyuki Kuroda

Department of Radiology, Faculty of Medicine, Shimane University, Izumo, Japan

Toshihiko Kawamura

Division of Medical Informatics, Shimane University Hospital, Izumo, Japan

Mizuki Fukuda

Department of Radiology, Shimane University Hospital, Izumo, Japan

Yoshinori Miyahara

Department of Radiology, Shimane University Hospital, Izumo, Japan

Takeshi Yoshizako

Department of Radiology, Faculty of Medicine, Shimane University, Izumo, Japan

Yasushi Kaji

Department of Radiology, Faculty of Medicine, Shimane University, Izumo, Japan

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