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find Keyword "单光子发射计算机断层成像" 3 results
  • Imaging analysis of jaw defects reparation with antigen-extracted porcine cancellous bone

    At present, most of the bone xenograft for clinical application comes from bovine. In recent years, many studies have been done on the clinical application of porcine xenograft bone. The goal of this study was to evaluate the effect of canine mandibular defects reparation with antigen-extracted porcine cancellous bone by imaging examination. Four dogs’ bilateral mandibular defects were created, with one side repaired with autologous bone (set as control group) while the other side repaired with antigen-extracted porcine cancellous bone (set as experimental group). Titanium plates and titanium screws were used for fixation. Cone beam computed tomography (CBCT), computed tomography (CT), single-photon emission computed tomography (SPECT) were undertaken at week 12 and 24 postoperatively, and SPECT and CT images were fused. The results demonstrated that the remodeling of antigen-extracted porcine cancellous bone was slower than that of autologous bone, but it can still be used as scaffold for jaw defects. The results in this study provide a new choice for materials required for clinical reparation of jaw defects.

    Release date:2017-12-21 05:21 Export PDF Favorites Scan
  • 单光子计算机断层减影与核磁共振融合成像术在癫痫致痫灶定位中的应用进展

    癫痫是最常见的慢性脑部疾病之一,其中药物难治性癫痫比例为 20%~30%,目前癫痫手术治疗是难治性癫痫的唯一手段,而术前准确定位致痫病灶则是手术成败的关键。发作期单光子计算机断层减影与核磁共振融合成像术(Subtraction ictal single-photon emission computed tomography coregistered to MRI,SISCOM)作为一种全新的技术为癫痫致痫灶的准确定位翻开了新篇章,它克服了传统单光子发射计算机断层成像术(SPECT)空间分辨率不足的缺点,其成像的敏感性与特异性已被证实较单纯的发作期与发作间期 SPECT 成像增加,特别是对于核磁共振(MRI)阴性和颞叶外的癫痫患者,另外 SISCOM 在预测癫痫术后效果方面也具有独特价值。文章就 SISCOM 技术应用介绍、致痫灶定位的准确性、预测术后效果、基于 SISCOM 的新理念以及未来的发展等方面做一综述。

    Release date:2018-03-20 04:09 Export PDF Favorites Scan
  • 心因性非癫痫性发作影像学检查方法的应用进展

    心因性非癫痫性发作(Psychogenic non-epileptic seizures,PNES)是阵发性疾病,临床症状与癫痫十分相似,临床上 PNES 确诊的金标准是视频脑电图(VEEG)。近年来,随着影像学技术的发展,一些影像学检查方法也已用于 PNES 的辅助诊断。回顾近年的相关文献,对 PNES 的影像学检查方法的应用进展进行综述。

    Release date:2018-03-20 04:09 Export PDF Favorites Scan
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