研究生: |
卓長霖 Chang-Lin Cho |
---|---|
論文名稱: |
端對端手持藥排辨識技術 Toward End-to-End Identification of Handheld Pharmaceutic Blister Packages |
指導教授: |
鍾聖倫
Sheng-Luen Chung |
口試委員: |
鍾聖倫
Sheng-Luen Chung 蘇順豐 Shun-Feng Su 郭重顯 Chung-Hsien Kuo 徐繼聖 Gee-Sern Hsu 方文賢 Wen-Hsien Fang |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2020 |
畢業學年度: | 108 |
語文別: | 英文 |
論文頁數: | 61 |
中文關鍵詞: | 藥排辨識 、端對端物件偵測 、資料增量 |
外文關鍵詞: | pharmaceutic blister package identification, end-to-end object detection, data augmentation |
相關次數: | 點閱:304 下載:0 |
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完美正確的處方箋配置是醫藥安全追求的主要目標。但不可避免地,不管這機率有多低,人終會出錯。自動化的藥排辨識技術被視為輔助藥劑師配藥達成上述目標的最有效技術。特別是不影響藥師配藥流程的辨識技術,像是在開放空間中針對手持藥排進行辨識的技術,就更顯重要。然而,由於藥排種類眾多約有230種以上,藥排部份被手遮蔽,而且操作環境中背景與光照條件的不確定性,致使開放空間中的手持藥排辨識具技術挑戰性。先前最好的HBIN解決方案是兩階段的:先經過一個網路同時從正面與反面圖像中框取出藥排,然後個別轉置並合併到固定大小的模版上,再由另一個網路上進行辨識。雖然有 92% 的 F1-score,此架構的訓練與實現的成本昂貴。對於達成趨於完美的配藥目標,本論文的貢獻有三:第一是更簡潔有效的網路架構:在仍延用雙面圖像的基礎上,尋求僅用一個深度學習網的端對端解決方案。另外在尋求只仰賴單面手持藥排影像為依據的辨識技術,我們系統性地檢試各物件偵測的解決方案。第二是有效的資料增量技術:在所檢視的各方案中,述採雙面的ROR,以及單面的 YOLO與 SSD網路架構,在經由合成影像預訓練後,在陌生環境中F1-score 的辨識率可達 95%以上,而在熟悉環境中更可達100%。第三個是趨於完美的配藥保證:我們將本藥排辨識系統與醫院的處方箋系統整合為自動處方箋核時系統。即使有1%的人為操作錯誤率 (這是嚴重高估的失誤率),整合核實系統平均出錯的機率會降至每百萬次為2.1次以下。以馬偕醫院的配藥流程為應用例,利用本論文所提新的藥排辨識技術所實現的自動整合核實系統,已成功展示其可行性與優越性。
Error-free prescription dispensing is the ultimate goal set by drug safety. Nonetheless, human errs. To attain the perfect goal, automated pharmaceutic blister package identification (PBPI) is regarded as the most effective technology to. In particular, the technique that identifies hand-held packages in open environment. However, identification of handheld blister packages in open spaces is challenging because of the numerous number of more than 230 package types, the partial occlusion covered by hands, and the uncertainty posed in the open environment. Thus far, the best reported solution HBIN that relies on complementarily paired front and back images of the handheld package is a two-stage process: the first is to crop the hand-held package from both side images, and to juxtapose them into a fixed-size template, before the joint template is identified by the second stage. Achieving a 92% F1-score, the two-stage solution require mores resources for implementation and training, in addition to more computational time. To approach the error-free dispensing goal effectively, the study contributes in three accounts: First, better network architectures: This is done in two directions: one is an end-to-end trainable solution by only one deep learning network; the other is solutions that rely only on single-sided hand-held package image. Second, performance boosting through data augmentation: Through multiplied and diversified synthetic images to contain uncertainty posed in open spaces, the identification performance for the two-sided ROR, and the single-sided YOLO and SSD, pre-trained by the synthetic images all attain an F1-score of more than 95% in new testing environments and 100% in familiar ones, both significantly boosted. Third, the integrated Dispensation Verification System (DVS): For an exaggerated case when the human error rate is 1\%, the resultant error probability by the DVS that integrates PBPI with the dispensing reminder module, on average is drastically reduced to less than 2.1 per million. The proposed DVS has been implemented and successfully field-tested at Mackay Hospital, demonstrating its feasibility and superiority in assuring almost error-free prescription dispensing.
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