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題 名 | 提昇冠狀動脈多列式電腦斷層之影像品質:閉氣後延遲掃描技術的運用=Improvement in Coronary Angiography Image Quality Using Multi-Detector Computed Tomography: Use of Delayed Scanning after Breath-hold |
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作 者 | 廖學鍵; 張文釧; 魏世民; 吳新華; | 書刊名 | 澄清醫護管理雜誌 |
卷 期 | 5:3 2009.07[民98.07] |
頁 次 | 頁7-12 |
分類號 | 415.213 |
關鍵詞 | 冠狀動脈多列式電腦斷層攝影檢查; 影像品質; 閉氣後延遲掃描技術; Coronary angiography using MDCT; Image quality; Delayed scanning after breath-hold; |
語 文 | 中文(Chinese) |
中文摘要 | 罹忠嚴重冠狀動脈粥狀硬化的致死率相當高, 唯有早期的診斷與適時治療可以有效降低致死率。 以往都是利用心導管血管攝影及侵入性血管超音波 來做為主要核查方法,但皆屬於侵入性檢查,現今 可以利用非侵入性的多列式電腦斷層來進行檢查及 診斷。由於冠狀動脈多列式電腦斷層攝影是利用回 朔式心電圖同步影像擷取技術進行影像重組,所以 心跳頻率在影像品質具有關鍵性的影響。本研究針 對30位健康檢查病怠,並且利用呼吸控制來觀察閉 氣後心跳頻率變化,發現第三秒之後心跳頻率較前 兩秒降低了10.1個百分比,由於運用回朔式心電圖 同步影像擷取技術來重組影像,此心跳頻率變化會 降低影像品質。藉由閉氣後延遲些許時間後再進行 掃描,將可以有效減少心跳頻率落差,並且掃描期 間能在較低且規律的心跳頻率下進行檢查。因此利 用閉氣後延遲技術於心臟冠狀動脈多列式電腦斷層 攝影檢查,可以有效率提昇整體影像品質。 |
英文摘要 | Early diagnosis and treatment of coronary atherosclerosis is essential in reducing the mortality rate from this disease. Conventional catheterization angiography is the diagnostic standardfor determining the presence, location and severity of coronary artery disease. Multi-detector computed tomography (MDCT) angiography is a noninvasive alternative to cardiac catheterization which uses retrospective ECG gating to reconstruct images of the coronary arteries. The key factor in the acquisition of quality images involves control of the heart rate. Using breath control techniques, we observed that the heart rate after breath-hold in 30 patients is reduced by 10.1% between the ρ'rst two seconds of breath-hold and the third second. This reduction in heart rate degrades the quality of images that are reconstructed by retrospective ECG gating during MDCT therefore delaying the scan after breath-hold may effectively avoid the drop in heart rate and provide scαnning within a more regular heart rate period. Delayed scanning after breath-hold during coronaηI angiography using MDCT can, thus, potentially improve image quality. |
本系統中英文摘要資訊取自各篇刊載內容。