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目的 :通过三维与二维超声成像对脉络膜黑色素瘤的检查及比较 ,了解三维诊断技术的优越性。方法 :应用 OTI3Di- Scan眼科专用超声仪首先进行二维 B超检查 ,取肿瘤最清晰方位作三维检查 ,探头旋转 1 80度 ,连续取二维扫描图像 ,然后重建成三维图像。体积测定按需要设定病变的切割厚度 ,画出各切面的轮廓 ,由计算机算出体积。结果 :4例脉络膜黑色素瘤三维图像中 1例呈圆球形 ,3例为椭圆球形 ,并可观察任何切面的肿块内部结构。精确测定出肿块体积 ,其中最大 1例体积为 1 4 99.9mm3 。二维超声显像显示 1例圆形 ,3例为椭圆形。 4例都有挖空现象 ,3例有脉络膜凹陷及球后声影。测量肿块面积最大 1例为 1 1 .1 5mm× 1 7.66mm。结论 :诊断脉络膜黑色素瘤三维超声成像比二维超声成像更具有优越性。外部形态呈立体球形 ,与肿瘤实际形态接近 ,并可观察任意切面内部结构 ,能够精确测量肿瘤的体积
OBJECTIVE: To investigate the superiority of three-dimensional (3D) diagnostic techniques by examining and comparing choroidal melanoma with three-dimensional and two-dimensional ultrasound imaging. Methods: The OTI3Di-Scan ophthalmoscope was firstly used to perform two-dimensional B-mode ultrasound examination. The most clear orientation of the tumor was three-dimensionally examined. The probe rotated 180 degrees. The two-dimensional scan images were taken continuously and then reconstructed into three-dimensional images. Volume measurement according to the need to set the lesion thickness, draw the outline of each section, calculated by the computer volume. Results: In the three cases of choroidal melanoma, one case was spherical and the other three cases were oval. The internal structure of the tumor in any section was observed. The volume of lumps was accurately determined, of which the largest one was 1 4 99.9 mm3. Two-dimensional ultrasound imaging showed 1 case of round shape and 3 cases of oval shape. 4 cases have hollowed out, 3 cases of choroidal depression and ball shadow. The largest area of the tumor was 1 1 .1 5mm × 1 7.66mm. Conclusion: The diagnosis of choroidal melanoma three-dimensional ultrasound imaging more than two-dimensional ultrasound imaging more advantages. The external shape of a three-dimensional spherical shape similar to the actual tumor, and can observe any internal structure of the incision can accurately measure the volume of the tumor