The objective of this research was to use abdominal computed tomography (CT) scans to non-invasively quantify anthropometrical data of the human stomach and to concomitantly create an anatomically correct and distensi...The objective of this research was to use abdominal computed tomography (CT) scans to non-invasively quantify anthropometrical data of the human stomach and to concomitantly create an anatomically correct and distensible ex-vivo gastric model. Thirty-three abdominal CT scans of human subjects were obtained and were imported into reconstruction software to generate 3D models of the stomachs. Anthropometrical data such as gastric wall thickness, gastric surface area and gastric volume were subsequently quantified. A representative 3D computer model was exported into a selective laser sintering (SLS) rapid prototyping machine to create an anatomically correct solid gastric model. Subsequently, a replica wax template of the SLS model was created. A negative mould was offset around the wax template such that the offset distance was equivalent to that of the gastric wall thickness. A silicone with similar mechanical properties to the human stomach was poured into the offset. The lost wax manufacturing technique was employed to create a hollow distensible stomach model. 3D computer gastric models were generated from the CT scans. A hollow distensible silicone ex-vivo gastric model with similar compliance to that of the human stomach was created. The anthropometrical data indicated that there is no significant relationship between BMI and gastric surface area or gastric volume. There were inter- and intra-group differences between groups with respect to gastric wall thickness. This study demonstrates that abdominal CT scans can be used to both non-invasively determine gastric anthropometrical data as well as create realistic ex-vivo stomach models.展开更多
[目的]建立一个多元线性方程预测全髋关节置换术(total hip arthroplasty,THA)术中所使用的髋臼假体直径(外径)。[方法]2019年3月—2022年11月在本院行THA的182例(182髋)患者纳入本研究。对实际使用髋臼假体外直径与患者生理测量参数行P...[目的]建立一个多元线性方程预测全髋关节置换术(total hip arthroplasty,THA)术中所使用的髋臼假体直径(外径)。[方法]2019年3月—2022年11月在本院行THA的182例(182髋)患者纳入本研究。对实际使用髋臼假体外直径与患者生理测量参数行Pearson相关性分析,以髋臼假体外径为因变量,患者生理参数为自变量,建立多元线性回归方程。将验证队列的数据代入多元线性方程所得到的预测髋臼假体直径与实际所用的髋臼假体直径相比,评估预测方程的准确性。[结果]Pearson相关分析表明,髋臼假体外直径与身高(r=0.653,P<0.001)、体重(r=0.627,P<0.001)、足长(r=0.633,P<0.001)呈显著正相关,而与年龄无显著相关性(P>0.05)。多元线性回归得预测方程:Y(髋臼假体直径mm)=20.702+0.465×足长(cm)+0.090×身高(cm)+0.086×体重(kg)。该方程预测在一个尺寸之内假体的准确率为70.9%,预测在两个尺寸之内假体的准确率为90.9%。[结论]人体测量数据能够准确预测THA中髋臼假体直径。展开更多
基金Supported by the Irish Research Council for Science Engineering and Technology and by the National Development Plan
文摘The objective of this research was to use abdominal computed tomography (CT) scans to non-invasively quantify anthropometrical data of the human stomach and to concomitantly create an anatomically correct and distensible ex-vivo gastric model. Thirty-three abdominal CT scans of human subjects were obtained and were imported into reconstruction software to generate 3D models of the stomachs. Anthropometrical data such as gastric wall thickness, gastric surface area and gastric volume were subsequently quantified. A representative 3D computer model was exported into a selective laser sintering (SLS) rapid prototyping machine to create an anatomically correct solid gastric model. Subsequently, a replica wax template of the SLS model was created. A negative mould was offset around the wax template such that the offset distance was equivalent to that of the gastric wall thickness. A silicone with similar mechanical properties to the human stomach was poured into the offset. The lost wax manufacturing technique was employed to create a hollow distensible stomach model. 3D computer gastric models were generated from the CT scans. A hollow distensible silicone ex-vivo gastric model with similar compliance to that of the human stomach was created. The anthropometrical data indicated that there is no significant relationship between BMI and gastric surface area or gastric volume. There were inter- and intra-group differences between groups with respect to gastric wall thickness. This study demonstrates that abdominal CT scans can be used to both non-invasively determine gastric anthropometrical data as well as create realistic ex-vivo stomach models.
文摘[目的]建立一个多元线性方程预测全髋关节置换术(total hip arthroplasty,THA)术中所使用的髋臼假体直径(外径)。[方法]2019年3月—2022年11月在本院行THA的182例(182髋)患者纳入本研究。对实际使用髋臼假体外直径与患者生理测量参数行Pearson相关性分析,以髋臼假体外径为因变量,患者生理参数为自变量,建立多元线性回归方程。将验证队列的数据代入多元线性方程所得到的预测髋臼假体直径与实际所用的髋臼假体直径相比,评估预测方程的准确性。[结果]Pearson相关分析表明,髋臼假体外直径与身高(r=0.653,P<0.001)、体重(r=0.627,P<0.001)、足长(r=0.633,P<0.001)呈显著正相关,而与年龄无显著相关性(P>0.05)。多元线性回归得预测方程:Y(髋臼假体直径mm)=20.702+0.465×足长(cm)+0.090×身高(cm)+0.086×体重(kg)。该方程预测在一个尺寸之内假体的准确率为70.9%,预测在两个尺寸之内假体的准确率为90.9%。[结论]人体测量数据能够准确预测THA中髋臼假体直径。
