Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 2

Year

2020 1

2010 1

Keywords

D001 resin 1

adsorption 1

diagnosis 1

follow-up 1

nanoscale zero-valent iron (nZVI) 1

nasopharyngeal carcinoma 1

technetium 1

open ︾

Search scope:

排序： Display mode:

An adsorption study of

Lingxiao FU, Jianhua ZU, Enxi GU, Huan WANG, Linfeng HE

Frontiers in Energy 2020, Volume 14, Issue 1, Pages 11-17 doi: 10.1007/s11708-019-0634-y

Abstract: Nanoscale zero-valent iron (nZVI) supported on D001 resin (D001-nZVI) was synthesized for adsorption of high solubility and mobility radionuclide Tc. Re(VII), a chemical substitute for Tc, was utilized in batch experiments to investigate the feasibility and adsorption mechanism toward Tc(VII). Factors (pH, resin dose) affecting Re(VII) adsorption were studied. The high adsorption efficiency of Re(VII) at pH= 3 and the solid-liquid ratio of 20 g/L. X-ray diffraction patterns revealed the reduction of into ReO immobilized in D001-nZVI. Based on the optimum conditions of Re(VII) adsorption, the removal experiments of Tc(VII) were conducted where the adsorption efficiency of Tc(VII) can reach 94%. Column experiments showed that the Thomas model gave a good fit to the adsorption process of Re(VII) and the maximum dynamic adsorption capacity was 0.2910 mg/g.

Keywords： technetium nanoscale zero-valent iron (nZVI) D001 resin adsorption

HTML PDF Collect

Technetium-99m-sestamibi SPECT for the diagnosis and follow-up of nasopharyngeal carcinoma

Jing CHEN MD, Guang-Yuan HU MD, Guo-Qing HU MD, Hua WU PhD,

Frontiers of Medicine 2010, Volume 4, Issue 1, Pages 96-100 doi: 10.1007/s11684-010-0001-1

Abstract: This study was to investigate a better way to detect and differentiate primary, residual, recurrent nasopharyngeal carcinoma (NPC) lesions post-radiotherapy in patients with NPC by means of routine computed tomography (CT) in combination with Tc-sestamibi single photon emission computed tomography (Tc-MIBI SPECT). Forty-eight patients with histologically confirmed primary NPC underwent Tc-MIBI SPECT at the 3rd month before and after radiotherapy, and at the 6th month after radiotherapy. All patients had contemporaneous CT examinations. Histopathologic results and/or clinical follow-up data (over 18 months) were used as the golden standard for evaluating residual/recurrent lesions. The radioactive count ratio of nasopharynx to scalp was obtained as the MIBI uptake index (MUI). Receiver operating characteristic analysis was employed to define the cut-off value of MUI for malignancy. With MUI 2.15 as the cut-off point, the accuracy for detecting primary NPC was 94.12%. The mean MUI in the local-regional of the nasopharynx in such negative cases was 1.21±€0.12 at the 3rd month, while the mean MUI was higher in the other 15 patients with histologically confirmed recurrent/residual lesions (MUI=1.40€±€0.16, =4.71, <0.001). The optimal cut-off point of 1.33 of MUI was defined with 89.58% accuracy for differentiating residual/recurrent lesions from the benign process post radiotherapy, while CT evaluations showed an accuracy of 81.25%. A combination of CT and Tc-MIBI SPECT for 37 NPC patients with congruent results showed an accuracy of 97.30% for differentiating residual/recurrent NPC from benign lesions. Tc-MIBI SPECT plays a role in evaluating residual/recurrent lesions post-radiotherapy. The combination of CT and Tc-MIBI SPECT can give more accurate diagnosis in the follow-up of NPC.

Keywords： nasopharyngeal carcinoma diagnosis follow-up