Application of single photon emission computed tomography (SPECT) parameters for bone scintigraphy

The purpose of this study is to define an optimal strategy for tomographic acquisition procedure using single photon emission computed tomography (SPECT) phantom and apply it in routine bone scintigraphy studies. Acquisition parameters include the number of projections, matrix size; types of collimator used data and the multi-channel analyzer windows. This work demonstrates that, increasing number of views leads to better contrast and resolution of the reconstructed image due to increasing cancellation region of noise. The matrix size of 128 × 128 provides improvement in the resolution of the reconstructed image more than the 64 × 64 matrix although it takes more memory space in acquisition and takes longer time in processing the data. The ultra-high resolution collimator provides improvement in the resolution of the reconstructed image compared with the high resolution collimator. Energy window width 20% of the photo-peak energy gives the best contrast with adequate resolution in the reconstructed image than others energy window widths of 10% and 15% of the photo-peak energy. These could lead to an accurate investigation in the early detection of small metastatic lesions.