Three-Dimensional Image Fusion Research Based On Ceus

HIFU treatment depends largely on the target region of the target location, monitoring. Based on ultrasound-guided HIFU tumor therapy system in the course of treatment of uterine fibroids, mainly rely on on-board diagnostic ultrasound equipment to monitor the tumor, and treatment of the ultrasonic probe head is integrated, only through the skin of uterine fibroids image whose imaging worse than the effect of super B single diagnostic functions. During surgery also found that when the ultrasonic energy accumulated in the target area, would interfere with the signal B-mode imaging, image blur, you can not accurately determine the tumor area. Based on ultrasound-guided HIFU treatment, doctors usually monitored treatment area by ultrasound, observing gray scale to determine whether tissue coagulation necrosis. However, this change does not appear in some cases, the gradation change may also disappears after a short occurs, and therefore it is not enough to evaluate the therapeutic effect only by an ordinary B-mode image change. In order to better monitor the target area, to evaluate the therapeutic effect, usually need the help of other image data,such as MRI/CT images,ultrasound contrast images.Contrast-enhanced ultrasound imaging technology can be dynamic, clearly showing imperceptible blood-vessel, by observing the target of blood flow of real-time to evaluate treatment effect, the technology can be used as ordinary B ultrasonic images of beneficial supplement. To compensate for not prompt tumor area, and an inability to evaluate the therapeutic effect of defects in some cases, this study proposes a new video surveillance solution, The tumor vascular perfusion area fuse on the B-picture, in order to better guide the HIFU treatment, evaluation of treatment effect, based on this, the paper made a study of the following aspects:(1)we propose a fibroid perfusion region extraction method based on ultrasound contrast.First, Brox optical flow method was used to estimate motion of two adjacent frames, based on the results of the displacement field for motion correction. Finally, extracted vascular perfusion region from the surrounding background based on the differences in gray scale for the magnitude of the rich blood supply area and lack of blood supply area.(2)In order to be able to get the whole uterine fibroids stereo perfusion distribution, this paper also studied the three-dimensional medical image reconstruction algorithm. Cover the uterine fibroids according to certain spacing layer scanning in vascular perfusion of the peak period,and extract vascular perfusion area of each fault and 3d reconstruction of the body to obtain a 3d image of the entire blood supply of uterine fibroids.(3)Finally, in order to achieve common CEUS images and ultrasound images were combined to a common guide HIFU treatment, this study also designed and developed a three-dimensional reconstruction and image fusion system.Cut 3d model of the vascular perfusion area and fusion with real-time ultrasound images,then showed the distribution of blood flow of the cross-section upon real-time ultrasound image, so as to better guide the HIFU treatment process.Uterine fibroids perfusion region extraction algorithm designed in this paper is simple, accurate; we rebuild three-dimensional images of vascular perfusion area of uterine fibroids using ray casting algorithm; successful implementation of the three-dimensional reconstruction and image fusion system, capable of real-time ultrasound image fusion vascular perfusion display area. This new video surveillance solution helps pinpoint HIFU therapeutic target, making the high-energy in the target area, reducing the area outside of the wrong target damage, reducing the HIFU non-invasive treatment of difficulty, to enhance the therapeutic effect.