Ghosh A, Nanda N C, Maurer G
Ultrasound Med Biol. 1982;8(6):655-61. doi: 10.1016/0301-5629(82)90122-3.
We describe a method for three-dimensional reconstruction of real time two-dimensional echocardiographic images using a rotation method. Seven tissue specimens were studied in a water bath and two-dimensional images were recorded by rotating the transducer every 30 degrees, from 0 to 180 degrees. Angular reconstruction of areas was obtained at different axial locations and volumes calculated by a Sigma 9 computer using axial summation without geometric assumptions. Using spatial coordinate data, three-dimensional perspective images could be plotted by the computer in any desired view. The volumes obtained by this method (range 90-231 ml) corresponded closely (R = 0.96) with volumes measured directly by water displacement (range 95-200 ml). Two patients were also studied with this technique by placing the transducer at the cardiac apex to record two-dimensional left ventricular and diastolic and end systolic images. Three-dimensional reconstructed volumes closely correlated with those obtained by left ventricular angiography. Ejection fraction in one patient was 52% by three-dimensional reconstruction, 47% by angiocardiography. In the other patient, the ejection fraction was 76% by three-dimensional imaging, 69% by angiocardiography. This preliminary study demonstrates the feasibility and simplicity of three-dimensional reconstruction using the rotation method.
我们描述了一种使用旋转法对实时二维超声心动图图像进行三维重建的方法。在水浴中对7个组织标本进行了研究，通过每30度旋转换能器（从0度到180度）来记录二维图像。在不同轴向位置获得区域的角度重建，并由Sigma 9计算机使用轴向求和法在无几何假设的情况下计算体积。利用空间坐标数据，计算机可以在任何所需视图中绘制三维透视图。通过这种方法获得的体积（范围为90 - 231毫升）与通过水置换法直接测量的体积（范围为95 - 200毫升）密切相关（R = 0.96）。还对两名患者使用该技术进行了研究，将换能器置于心尖以记录二维左心室舒张期和收缩末期图像。三维重建体积与通过左心室血管造影获得的体积密切相关。一名患者通过三维重建得出的射血分数为52%，通过心血管造影为47%。在另一名患者中，通过三维成像得出的射血分数为76%，通过心血管造影为69%。这项初步研究证明了使用旋转法进行三维重建的可行性和简易性。
