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題名 | 多排偵測器電腦斷層虛擬內視鏡閥值檢測對上半規管裂開之應用=Application of MDCT Virtual Endoscope Threshold Detection in Superior Semicircular Canal Dehiscence |
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作者姓名(中文) | 陳文昌; 王士崇; 林秋湧; 林佳霓; 廖漢弘; | 書刊名 | 中華放射線技術學雜誌 |
卷期 | 37:3 2013.09[民102.09] |
頁次 | 頁166-172 |
分類號 | 416.14 |
關鍵詞 | 多排偵測器電腦斷層虛擬內視鏡; 上半規管裂開; 結束閥值; MDCT virtual endoscopy; Superior semicircular canal dehiscence; Closed threshold; |
語文 | 中文(Chinese) |
中文摘要 | 1998年國外首次出現了上半規管裂開的研究報告,而這些患者的病因,是因為掌管平衡的半規管裂開,因此對聲音或壓力些微變化會非常的敏感,當耳外聲音忽然變大或壓力改變時,就容易造成病人眩暈、振動幻視、聽力喪失等症狀。將疑似上半規管裂開的六位患者先作高解析度顳骨電腦斷層,並挑選非上半規管裂開病患六名,做為對照組,將這些影像傳入後處理工作站,然後由三位工作年資十年以上之專業放射師使用多排偵測器電腦斷層虛擬內視鏡來檢測,這12位24隻耳朵各做兩次的結束閥值檢測,其三位閥值檢測者結果組內信度與組間信度都非常高。經統計分析發現患病側耳朵結束閥值顯著不同于正常側及對照組之雙耳(p<0.001);而正常側耳朵結束閥值和對照組之雙耳並沒有任何差異(p=0.063)。多排偵測器電腦斷層對其上半規管裂開檢查,無疑是最佳利器,但由於此處骨頭結構複雜,影像上容易形成裂開之假影,小於0.3 mm以下的裂開,診斷上將有困難的,而多排偵測器電腦斷層虛擬內鏡與變異的重建閾值是善於識別小迷路裂開程度,可辨識的程度可下降到0.3 mm或更小。因此本研究是利用多排偵測器電腦斷層虛擬內視鏡閥值的量測,來補足多排偵測器電腦斷層對內耳迷路小於0.3 mm無法辨識的缺點,以提高診斷對小於0.3 mm的上半規管準確性。 |
英文摘要 | Superior semicircular canal dehiscence (SSCD) was first reported in 1998. Semicircular canal dehiscence changed patient’s balance, and caused sensitively to slight sound or pressure change. When suddenly larger outer sound appeared or pressure changed, it would initiate symptoms of vertigo, oscillopsia, and hearing loss etc. Six suspected superior semicircular canal dehiscence patients used for high resolution CT(HRCT) scan of the temporal bone first, and six non SSCD patients were picked up for control group, then those images uploaded to after-treatment workstation. Three radiological technologists with 10 years of work experience used multi-detector CT(MDCT) virtual endoscope to detect 24 ears of these 12 patients closed threshold detection twice per ear, these three observers had high intra-observer and inter-observer reliability. The affected ear thresholds significantly differed from those of both unaffected ears and normal controls(p<0.001 for both comparisons). Thresholds of unaffected ears and normal controls did not differ(p=0.063). MDCT is a valuable tool in the detection and management of SSCD. However, due to complex bone structure of semicircular canal that formed artifacts easily, it was difficult to diagnose below 0.3 mm crack. The MDCT virtual endoscopy with variation of reconstruction threshold is good at identifying small labyrinthine dehiscences down to 0.3 mm or smaller. The research used MDCT virtual endoscope threshold detection to strengthen MDCT weakness which unrecognized below 0.3 mm labyrinth, to improve diagnosis accuracy. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。