Technique for a hybrid system of real-time transrectal ultrasound with preoperative magnetic resonance imaging in the guidance of targeted prostate biopsy
Technique for a hybrid system of real-time transrectal ultrasound with preoperative magnetic resonance imaging in the guidance of targeted prostate biopsy
复制标题
DOI：
10.1111/j.1442-2042.2010.02617.x
复制
发表时间：
2010-10-01
影响因子：
2.6
通讯作者：
Miki, Tsuneharu
中科院分区：
文献类型：
--
作者：
Ukimura, Osamu;Hirahara, Naoki;Miki, Tsuneharu
前列腺的诊断磁共振成像（MRI）已达到越来越高的准确性水平。由于实时MR引导的靶向活检仍然是一个复杂和昂贵的程序，有相当大的兴趣在MR/经直肠超声（TRUS）杂交图像引导活检技术。然而，由于术前MRI图像采集时前列腺的3-D形状可能与术中TRUS图像不同，因此每个3-D体积数据的精确配准至关重要。为了减少TRUS与MRI配准的潜在错误，我们在刚性图像融合技术中引入了新的程序技术。首先，使用特制的塑料外框架获得术前MR图像，该外框架具有与放置在直肠中的真实的TRUS探头完全相同的形状，以模拟在MR或TRUS图像采集期间由于TRUS探头的存在或不存在而引起的前列腺变形。第二，我们应用双平面TRUS图像，而不是使用单个平面的纵向图像，在多平面显示器上平行显示相应的重建MRI，以便同时配准前列腺的水平和纵向图像，从而实现改进的3-D解剖匹配。
Diagnostic magnetic resonance imaging (MRI) for prostate has achieved increasingly higher levels of accuracy. Because real-time MR-guided targeted biopsy is still a complicated and expensive procedure, there is considerable interest in a technique of MR/transrectal ultrasound (TRUS) hybridized image-guided biopsy. However, because the 3-D shapes of the prostate at the time of image-acquisition at preoperative MRI are likely to be different from the intra-operative TRUS images, the precise registration of each 3-D volume data is critical. To reduce the potential errors in registration of TRUS with MRI, we introduce new procedural techniques in a rigid image fusion technique. First, preoperative MR images were obtained with a specifically-made plastic outer-frame, with exactly the same shape as the real TRUS probe, placed in the rectum, in order to simulate the deformation of the prostate caused by the absence or presence of a TRUS probe during the acquisition of MR or TRUS images. Second, instead of using a single plane of longitudinal image, we applied biplane TRUS images to be shown in parallel on a multiplanar display with corresponding reconstructed MRI, in order to register both horizontal and longitudinal images of the prostate simultaneously, thereby achieving improved 3-D anatomical matching.