Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC.
IEEE Trans Med Imaging. 1992;11(3):373-8. doi: 10.1109/42.158941.
The effect of positron range on the image-plane resolution of tomographic images is evaluated through calculations based on a model which employs beta-decay energy spectra and an empirical range formula. Predicted range distribution functions are compared with published measurements for three medically important positron emitters: (11 )C, (68)Ga, and (82)Rb. The effect of tomographic slice thickness on point-source annihilation distribution functions is also demonstrated. Line-spread functions are calculated using the model, for the above isotopes as well as for (18)F, (15)O, and (13)N. Image-plane resolution predictions are made for high-resolution positron cameras for various positron emitting isotopes with end-point energies up to 4 MeV.
通过基于使用β衰变能谱和经验射程公式的模型的计算，评估正电子射程对断层图像平面分辨率的影响。将预测的射程分布函数与三种医学上重要的正电子发射体的已发表测量值进行了比较：(11)C、(68)Ga 和 (82)Rb。还演示了断层切片厚度对点源湮没分布函数的影响。使用该模型计算了上述同位素以及 (18)F、(15)O 和 (13)N 的线扩展函数。针对各种端点能量高达 4 MeV 的正电子发射同位素，为高分辨率正电子相机做出了图像平面分辨率预测。
