BACKGROUND: Convenient way to clarify liver volum or tumor volume in the liver is eagerly demanded by hepa tobiliary surgeons, for so many aspects of clinical wor need to know the liver volumetry. At present, some me ...BACKGROUND: Convenient way to clarify liver volum or tumor volume in the liver is eagerly demanded by hepa tobiliary surgeons, for so many aspects of clinical wor need to know the liver volumetry. At present, some me thods have been used to measure the liver volumetry, suc as computed tomography (CT) scans, three-dimensiona ultrasound volumetric system [1] and 3-dimensional sono graphy[2,3] et al. But enough volumetric information wa failed to obtain by surgeons and a new way of measurin the liver volumetry that can be operated by themselves i exigent. Whereas we devise a new method of using Photo Shop in personal computer to measure the liver volumetry METHODS: A piece of whole CT film was transformed t a high quality digitized image by digital camera or scanne and then the digitized image was conducted as JPEG file in to personal computer. The JPEG image file of CT film wa opened by PhotoShop. Determining the edge of interested areas, and the data of pixel values of the interested areas di vided by 1 cm2 pixel value will produce the actual area with the unit of square centimeter. If section thickness of CT scan is 1 cm, the sum of the areas of the liver or tumor in all sections naturally is the volume of the liver or tumor. RESULTS: Comparison of 10 hepatic volumes gained by this method and those gained by the GE Prospeed CT se showed a good relativity between the two groups. The vo lumes of three right lobes were calculated by this method before lobectomy and their real volumes were obtained postoperatively by a volumenometer. Their variation wa limited to 5%. CONCLUSIONS: Hepatic volume obtained by PhotoShop is reliable. This method can be used to measure hepati volume perfectly to meet clinical demand, and many pa rameters such as liver resection rate, graft volume can be achieved. The disadvantage of this method is the step o copying the pixel value from PhotoShop to Microsoft Ex cel.展开更多
文摘BACKGROUND: Convenient way to clarify liver volum or tumor volume in the liver is eagerly demanded by hepa tobiliary surgeons, for so many aspects of clinical wor need to know the liver volumetry. At present, some me thods have been used to measure the liver volumetry, suc as computed tomography (CT) scans, three-dimensiona ultrasound volumetric system [1] and 3-dimensional sono graphy[2,3] et al. But enough volumetric information wa failed to obtain by surgeons and a new way of measurin the liver volumetry that can be operated by themselves i exigent. Whereas we devise a new method of using Photo Shop in personal computer to measure the liver volumetry METHODS: A piece of whole CT film was transformed t a high quality digitized image by digital camera or scanne and then the digitized image was conducted as JPEG file in to personal computer. The JPEG image file of CT film wa opened by PhotoShop. Determining the edge of interested areas, and the data of pixel values of the interested areas di vided by 1 cm2 pixel value will produce the actual area with the unit of square centimeter. If section thickness of CT scan is 1 cm, the sum of the areas of the liver or tumor in all sections naturally is the volume of the liver or tumor. RESULTS: Comparison of 10 hepatic volumes gained by this method and those gained by the GE Prospeed CT se showed a good relativity between the two groups. The vo lumes of three right lobes were calculated by this method before lobectomy and their real volumes were obtained postoperatively by a volumenometer. Their variation wa limited to 5%. CONCLUSIONS: Hepatic volume obtained by PhotoShop is reliable. This method can be used to measure hepati volume perfectly to meet clinical demand, and many pa rameters such as liver resection rate, graft volume can be achieved. The disadvantage of this method is the step o copying the pixel value from PhotoShop to Microsoft Ex cel.
