自動化電腦斷層影像品質分析

電腦斷層掃描儀廣泛用於非侵入性檢查中。為了確保斷層掃描的影像品質，必需要依賴特殊設備所產生的檢測影像，然後透過影像量測及目視方式進行判斷。有幾項關鍵性參數攸關影像品質的好與壞；包括影像明暗對比(Contrast scale)、高對比空間解析(High Contrast Resolution)、低對比空間解析(Low contrast detectability)、CT值及雜訊的均勻度(Noise and Uniformity)、雷射定位線的準確度(Laser Accuracy)等。本研究希望將電腦斷層的影像品質，透過程式進行分析、研判，包括影像明暗對比、高對比空間解析、低對比空間解析、CT值及雜訊的均勻度、雷射定位線的準確度以及MTF (Modulation Transfer Function)這幾個量測結果，並且直接顯示在螢幕上，讓工作人員不必花時間就可以了解目前影像品質的狀況。

關鍵字

斷層掃描；影像品質；影像處理； CT值； MTF

並列摘要

CT scanners are widely used in non-invasive examination. In order to ensure that the CT scan image quality, will need to rely on special equipment produced by the detection image, and then through the image measurements and visual way to judge. There are several key parameters of image quality is good or bad at stake; including Contrast scale, High Contrast Resolution, Low contrast detectability, Noise and Uniformity, Laser Accuracy. This study would like to computed tomography image quality through program analysis, analyzing Contrast scale, High Contrast Resolution, Low contrast detectability, Noise and Uniformity, Laser Accuracy. And directly displayed on the screen, so that staff do not have to take the time to be able to understand the current status of image quality.

並列關鍵字

Computed Tomograpgy ； Image Quality ； Image Process ； CT Numbr ； MTF

參考文獻

1.Goodenough DJW, Kenneth E.; Davis, David O.: Development of a Phantom for Evaluation and Assurance of Image Quality in CT Scanning. Society for Photo-Optical Instrumentation Engineers 1976, 96:228.

2.McCullough EC, Payne JT, Baker HL, Jr., Hattery RR, Sheedy PF, Stephens DH, Gedgaudus E: Performance evaluation and quality assurance of computed tomography scanners, with illustrations from the EMI, ACTA, and Delta scanners. Radiology 1976, 120:173-188.

3.Computed tomography : fundamentals, system technology, image quality, applications

4.Seeram E: Computed tomography : physical principles, clinical applications, and quality control. Philadelphia: Saunders; 1994.

5.Droege RT: A quality assurance protocol for CT scanners. Radiology 1983, 146:244-246.

延伸閱讀

趙敏、趙良曉、劉雪君、李玉麟、顏上惠、陳光耀（1998）。電腦斷層模擬攝影機影像解析度及雜訊的量測。放射治療與腫瘤學，5(3)，187-191。https://doi.org/10.6316/TRO/199805(3)187
游晉鑑（2010）。電腦合成斷層影像去殘影技術之比較性研究〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111410975
陳洊丞（2010）。電腦斷層影像與表面封裝元件之校正與缺陷檢測〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111410978
Lee, F. N., Tsai, J., Yen, D., Lo, H. C., Chern, C. H., Kao, W. F., Hu, S. C., Lee, C. H., & Chang, H. (1998). 急診部門對電腦斷層圖像之判讀品質研究. 中華民國急救加護醫學會雜誌, 9(1), 1-7. https://doi.org/10.30018/JECCM.199803.0001
Yu, G., Lin, P., Gao, J. F., Liu, C., & Mou, X. Q. (2011). Automated Fuzzy Segmentation Approach for Vessels in Computed Tomography Images. Journal of Medical and Biological Engineering, 31(6), 421-427. https://www.airitilibrary.com/Article/Detail?DocID=16090985-201112-201111180004-201111180004-421-427

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自動化電腦斷層影像品質分析

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