本研究的目的在於提出一個考慮顏面軟組織厚度的呼吸面罩設計的方法。呼吸面罩的罩緣必須與顏面的3D曲面吻合，才不會洩露。這項目標在3D人體掃描儀的問市以後，經過楊宜學和廖秀珍等人的研究，已經合理的提出以臉部的3D曲面來設計呼吸面罩的方法，這一套方法是以顏面的表面作為設計的標的曲面。我們知道顏面覆蓋著不同厚度的皮膚、肌肉等軟組織，有變形能力，軟組織的變形能力是吻合的一大助力。
本研究方法是利用電腦斷層掃描圖像，來量測顏面－罩緣介面曲線上的軟組織厚度。受測者要同時進行頭部的電腦斷層掃瞄和3D人體掃描。受測者為身體健康狀況良好的男性及女性各一位。量測之後，採用廖秀珍方法擷取顏面－罩緣介面曲線，抽出所有在介面曲線範圍內的電腦斷層圖像，在每一個電腦斷層圖像擷取軟組織的厚度。軟組織的厚度是以斷層圖像中心輻射線上顏面骨與表皮間之線段為度。
　　研究結果顯示，若將顏面－罩緣介面曲線由上到下分為鼻中點、鼻中點到鼻下翼、鼻下翼到下頦凹點、下頦凹點到下頦點、下頦點等五段，女性，各段的厚度分別為2.8mm、6.7mm、17.7mm、7.5mm、5.8mm；男性分別為4.2mm、8.2mm、19.5mm、9.2mm、6.9mm。本研究初步認為這些軟組織的變形能力以各段皮膚與肌肉脂肪比率之不同約在30%m與50%之間，以這樣的數據來看，先前研究所提出的變形能力，10mm~15mm似乎無法完全由軟組織的變形能力來達成。

The objective of this study is to propose a method for the design of respiratory mask
by considering the depth of facial soft tissue. The air-tightness of a respiratory mask
depends on the fit of the interface between the respiratory and the 3D surface of the
face. Upon the advent of 3D human scanners, this goal has been realized due to the
studies of Yi-Xue Yang and Xiu-Zhen Liao by proposing a mask design method based
on the 3D facial surface. It is known that the face covered with different thickness of
skin, muscle and other soft tissue, which are subjected to deformation under pressure.
Deformation can accommodating the fit of the interface between the mask and the
face.
The method of this study uses computer tomography images and 3D facial
range data to measure the thickness of facial soft tissue on the interface curve. One
male and one female was recruited as subjects for CT scan and 3D ficial surface
measurement. Upon measurement, an interface curve was extracted using Liao’s
method. All CT scan image bounded by the interface were used to measure soft tissue
thickness. The thickness was measure as the distance between the skin and the bone
on a radial line from the image center.
The result shows that the soft tissue thickness on the face range between 2.8mm
to 19.5 mm. If the interface curve is divided as mid-nasal point, mid-nasal to subalare,
subalare to sublabiale, sublabiale to menton, and menton into five sections, the
average thickness of each section the female is: 2.8mm, 6.7mm, 17.7mm, 7.5mm,
5.8mm; and the male is 4.2mm、8.2mm、19.5mm、9.2mm、6.9mm. The study
tentatively suggests that the proportion of soft tissue deformation for each section is
varying between 30% and 50% due to different tissue composition. If this is the case,
then the mask deformation allowance of 10mm~15mm proposed by previous studies
can not be achieved solely by the deformation of soft tissue.

摘要 i
Abstract ii
謝誌 iv
圖目錄 vi
表目錄 vii
第一章　緒論 1
1.1 研究動機 1
1.2 研究目的 4
第二章　文獻回顧 5
2.1 臉部結構 5
2.1.1顏面骨 5
2.1.2顏面肌 6
2.2 三次元人體計測資料庫 13
2.3 擷取3D貼合介面曲線方法 14
第三章　研究方法與結果 19
3.2量測系統 19
3.3量測步驟 20
3.3.1定義量測點 20
3.3.2定義基準線 20
3.4研究結果 22
第四章　討論 25
第五章　結論與建議 27
參考文獻 29

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