Crivianu-Gaita D, Miclea F, Gaspar A, Margineatu D, Holban S
Department of Computer, County Hospital, Timisoara, Romania.
Int J Med Inform. 1997 Jun;45(1-2):43-51. doi: 10.1016/s1386-5056(97)00033-6.
The aim of our study was to obtain a 3D model of the prostate from the ultrasound images and to represent it and calculate its volume. The establishing of prostate volume represents a necessary stage in choosing the method of solving prostate adenoma. The evaluation of the prostate volume can be done by transabdominal or endorectal echography. If the second method is not available it is necessary to use the echographic estimation of the volume of the prostate adenoma by suprapubian examination. This method lacks precision. In order to have a more accurate calculation of the prostate's volume than the ellipsoid approximation given by the echographic equipment, we designed a software tool for handling and management of digital images. The primary information is composed of two 2D digital images obtained by digitising the frames acquired from an 3.5 MHz ultrasound equipment for two incidences: sagittal and transversal. The bitmaps were filtered to reduce the noise and a contour detection algorithm was used. Further, the new 2D detected contours were processed with the help of an interactive image editor toward a 3D reconstruction of the prostate. The examiner can perform rotations and translations on the 2D projections and can adjust the angle between them. The resulting object (the 3D model of the prostate) was adjusted accordingly and its volume was displayed. The software was implemented on a PC system and was used in the Urology Clinic for several cases. It has been shown that, compared with the value provided by the approximation of the echographic equipment, a more accurate value of the volume of the prostate was obtained.
我们研究的目的是从超声图像中获取前列腺的三维模型，并对其进行呈现和计算其体积。前列腺体积的确定是选择解决前列腺腺瘤方法的必要阶段。前列腺体积的评估可通过经腹或直肠内超声检查来完成。如果无法采用第二种方法，则有必要通过耻骨上检查对前列腺腺瘤体积进行超声估计。这种方法缺乏精确性。为了比超声设备给出的椭球体近似值更准确地计算前列腺体积，我们设计了一个用于处理和管理数字图像的软件工具。主要信息由通过对从3.5兆赫超声设备采集的两个入射角（矢状面和横断面）的帧进行数字化获得的两张二维数字图像组成。对这些位图进行滤波以减少噪声，并使用轮廓检测算法。此外，借助交互式图像编辑器对新检测到的二维轮廓进行处理，以实现前列腺的三维重建。检查者可以对二维投影进行旋转和平移，并可以调整它们之间的角度。相应地对生成的对象（前列腺的三维模型）进行调整，并显示其体积。该软件在个人计算机系统上实现，并在泌尿外科诊所用于多个病例。结果表明，与超声设备近似值提供的值相比，获得了更准确的前列腺体积值。
