3.3设备配置 3.3.1单光子发射型计算机断层成像(SPECT)设备 3.3.2 X线、CT、磁共振成像(MRI) 3.3.3 PET-CT及PET-MRI 3.3.4放射性活度计 专家共识推荐:SPECT及放射性活度计为开展223Ra治疗的必备设备;CT、MRI、PET-CT及PET-MRI...
The visual quality of the SPECT images was reasonably good and the activity in the sphere was 27% smaller than the true activity. This underestimation is likely due to partial volume effect. Conclusion: Absolute quantitative Ra‐223 SPECT imaging is achievable with careful attention to compensate ...
99mTc-MDP SPECT/CT显像是去势抵抗性前列腺癌骨转移患者223Ra治疗前及疗效评估最基本的评估技术,223Ra注射后144小时可以进行223Ra SPECT平面全身骨显像,223Ra注射后2小时可以对骨骼转移灶进行223Ra SPECT/CT断层显像。有条件的单位可以用PE...
During the SPECT/CT reconstruction, the Butterworth filter was used. The results confirm that the FWHM increases with the number of iterations and justify the choice of two iterations. The spatial resolution obtained with these parameters is then 17.1 mm and 16.5 mm on the axial and ...
Basic study B showed that uptake in one of the spheres was overestimated by overlapped activity of the tube-shaped chamber in planar imaging whereas the spheres had similar counts and significantly higher sphere-to-background ratio in SPECT. On both planar and SPECT images, HEGP gave higher ...
A method for performing 131I quantitative SPECT imaging is described which uses the superimposition of markers placed on the skin to accomplish fusion of c... KF Koral,KR Zasadny,ML Kessler,... - 《Journal of Nuclear Medicine》 被引量: 187发表: 1994年 Biological dosimetry for triage of cas...
espect t o time and v oltage, boasting a minimal change in capacitance with r eference t o ambient temperatur e. Capacitance change is limited t o ±15% fr om −55°C t o +125°C. Surface Mount Multilayer Ceramic Chip Capacitors (SMD MLCCs) X7R Dielectric, 6.3 – 250 VDC (Comme...
Lutetium-177 (177Lu, half-life 6.6 d) is a therapeutic beta-emitter (Emax of 498.3 keV) radionuclide, useful for producing cytotoxicity in malignant tumors (particle range of 2 mm in tissue), but also a gamma-emitter (E = 208 keV), which makes its use for SPECT (singl...
Conclusions: We developed and evaluated a quantitative SPECT dual isotope reconstruction method for Th-227 and Ra-223 that accounts for crosstalk contamination. Organs that had activities greater than 10 kBq and 80 kBq of Ra-223 and Th-227, respectively, had a bias of ~5% and precision of ~...
Energy spectra of the two samples positioned on the ElScint-SPECT-γ-camera head surface were recorded graphically to study the energy distribution, decide the energy peak selection, the net area under eachγ-ray peak, the full-energy-peak efficiency and put right factors. Correction factors ...