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頁籤選單縮合
題名 | Helical Computed Tomography of the Abdomen: Evaluation of Image Quality Using 1.0, 1.3, and 1.5 Pitches=螺旋式電腦斷層攝影於腹部使用1.0、1.3 及 1.5 螺距之影像品質探討 |
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作者姓名(中文) | 林育駿; 吳冠群; 曾振輝; 黃敏政; 賴棟忠; 萬永亮; | 書刊名 | 長庚醫學 |
卷期 | 25:2 2002.02[民91.02] |
頁次 | 頁104-109 |
分類號 | 416.14 |
關鍵詞 | 電腦斷層攝影; 腹部電腦斷層攝影; 螺距; Computed tomography; Abdomen CT; Helical pitch; |
語文 | 英文(English) |
中文摘要 | 背景:本研究的目的主要是探討在螺旋式電腦斷層中使用螺距大到1.5時,人眼是否能夠區分出其中些微的差別。 方法:從2000年9月至2001年2月,我們針對72名病患,隨機分成三組,分別使用螺距1.0、1.3和1.5進行腹部電腦斷層掃瞄,在剔除掉其中12名因各種疾病而會影響影像評估的病患之後,其餘60名病患的影像由三位放射科醫師在未告知其影像參數的情況下針對9個正常部位及整體影像品質作評分,評分方式為1(最差)到5(最好)。 結果:三位醫師在判斷三種螺距對腹部9個正常部位及整體影像品質的差別時,在統計學上並無意義(P>0.05)。 結論:本研究在腹部螺旋式電腦斷層中使用螺距1.0、1.3及1.5的影像品質相當,故我們在臨床上可藉由增加螺距的方式來增加螺旋式電腦斷層掃描的速度及減少病人劑量。 |
英文摘要 | Background: The purpose of this study was to investigate whether trained radiologists can distinguish minor differences among computed tomography (CT) images of extended helical pitches of 1.0 to 1.5. Methods: Between september 2000 and Febuary 2001, 72 patients were randomized into 1 of 3 equal groups: helical pitches of 1.0, 1.3, and 1.5. The imaging parameters of all patients were kept constant. Twelve of the 72 patients were excluded because of various pathological conditions. In a total, 60 examinations were enrolled in the evaluation study. Three radiologists blinded to the image parameters were asked to independently evaluate 9 normal structures and overall images of 60 studies using a scale from 1 (worst) to 5 (best). Results: There were no statistically significant differences in evaluation of image quality among helical pitches 1.0, 1.3, and 1.5 of abdominal CT when assessiong 9 normal structures and overall images independently (p>0.05). Conclusions: Abdominal CT performed with helical pitches of 1.0, 1.3, and 1.5 were equivalent in this study. With the use of a helical pitch greater than 1, clinicians can benefit from increased scan coverage in less time and with less radiation than can be achieved with standard helical pitch-1.0 protocols. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。