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Objective: To evaluate the therapeutic effects of radiosurgery on brain tumor using 99Tcm-MIBI brain single-photon emission computed tomography (SPECT). Methods: Fifteen normal volunteers and 49 patients with brain tumor underwent 99Tcm-MIBI brain SPECT, and the tumor to non-tumor ratio (T/N) was calculated and compared before and after radiosurgery. The patients were regrouped according to different schedules for postoperative reexamination, and diagnostic sensitivity and specificity of 99Tcm-MIBI SPECT evaluated against that of conventional CT and magnetic resonance imaging. Results: After radiosurgery, the lesions were reduced or even disappeared in 22 cases, and tumor remnants or recurrence were found in 27 cases. The sensitivity, specificity and accuracy of “Tc”’-MIBI brain SPECT were 85. 2%, 68. 2% and 77. 6% , respectively. The sensitivity of postoperative 99Tcm-MIBI brain SPECT at 5. 8 months was 92% , significantly higher than that at 3. 1 months (89% , u = 2. 2545, P<0. 05) , and its accuracy w
Objective: To evaluate the therapeutic effects of radiosurgery on brain tumor using 99Tcm-MIBI brain single-photon emission computed tomography (SPECT). Methods: Fifteen normal volunteers and 49 patients with brain tumor underwent 99Tcm-MIBI brain SPECT, and the tumor to non -tumor ratio (T / N) was calculated and compared before and after radiosurgery. The patients were regrouped according to different schedules for postoperative reexamination, and diagnostic sensitivity and specificity of 99 Tcm-MIBI SPECT evaluated against that of conventional CT and magnetic resonance imaging. Results: After radiosurgery, the lesions were reduced or even disappeared in 22 cases, and tumor remnants or recurrence were found in 27 cases. The sensitivity, specificity and accuracy of “Tc” "- MIBI brain SPECT were 85.2% The sensitivity of postoperative 99Tcm-MIBI brain SPECT at 5. 8 months was 92%, significantly higher than that at 3. 1 months (89%, u = 2.2545, P <0. 05) , and its accuracy w