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題 名 | 影像重建與其在臨床診療之貢獻 |
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作 者 | 陳中明; 王正一; | 書刊名 | 醫學工程 |
卷 期 | 6:5 1994.10[民83.10] |
頁 次 | 頁764-771 |
專 輯 | 電腦斷層掃描--理論與應用 |
分類號 | 416.14 |
關鍵詞 | 影像重建; 電影斷層掃瞄; 正子放射式斷層; 掃瞄; 臨床診療; Image recorstruction; Computerized tomogoaphy; Positron emission tomography; Clinical diagnosis and treatment; |
語 文 | 中文(Chinese) |
中文摘要 | X-ray影像技術的出現,實現了人類長久以來透視人體的夢想,也對臨床診療起了相當的衝擊。然而X-ray影像還是有其功能不足之點。第一個問題是X-ray影像為X-ray束徑向上影像重疊的結果。它不僅僅無法提供某一特定組織深度的訊息,也增加了辨別正常和不正常組織的困難度。而其第二個缺點則為它不易分辨相鄰且衰減係數差異微小的組織,譬如相鄰的軟組織,也因此X-ray影像很難用於定量分析。而對於斷層掃瞄而言,這些問題都已迎刃而解。 藉由影像重建,斷層掃瞄已對臨床 診療的技術與品質之提升產生革命性的貢獻。一方面過去許多難以發現的病變,如小腫瘤,斷層掃瞄影像能清楚的指出其大小與位置。而另一方面的功能性影像更是提供了深入了解人體生化及生理代謝的過程之機會,進而極早發現潛在的疾病。 本文主要的目的在於(1)說明傳統影像在臨床診療上的不足點;(2)介紹”影像重建”如何能達成透視人體中每一點的任務,其中將簡單的說明X-ray CT和PET之影像重建方法;(3)舉例說明斷層掃瞄在臨床診療的應用。 |
英文摘要 | The advent of X-ray imaging realized the dream of human beings to nondestructively visualize the internal structure of a human body. It also brought out a great impact on clinical diagnosis and treatment. However, the conventional X-ray imaging techniques still have some drawbacks. The first problem is that an X-ray image is basically a superposition of many image planes in the direction of the X-ray beams. As a result, it not only cannot provide the depth information but also increase the difficulty to distinguish a normal tissue from an abnormal tissue. The second problem is on an X-ray image, it is not easy to distinguish two adjacent tissues of which attenuation coefficiencies are very close, e.g., two adjacent soft tissues. Furthermore, because of these two problems, it is difficult to use an X-ray image in quantitative analysis. But, these problems have been solved in computed topographic imaging. Through image reconstruction, the computed topographic imaging has revolutionized the techniques and quality of modern clinical diagnosis and treatment. On one hand, for many kinds of diseases which were difficult to detect, such as a small tumor, the computed topographic imaging can now clearly indicate its size and location. One the other hand, the functional images even provide the opportunity to understand the biochemical and physiological processes of the human body, and moreover, to early detect the potential diseases. The primary goals of this paper are to (1) describe the deficiency of the conventional imaging techniques such as x-ray imaging in the clinical diagnosis and treatment; (2) given an idea on how the “image reconstruction” accomplishes its mission to visualize every point in the human body, in which we will briefly describe the reconstruction methods for the x-ray CT and PET; (3) provide examples on the applications of computed tomographic images to the modern clinical diagnosis and treatment. |
本系統中英文摘要資訊取自各篇刊載內容。