In one general aspect, systems and devices disclosed herein may utilize 3D imaging and surgical navigation systems to facilitate the biopsy procedure. Disclosed systems and devices may benefit from a high degree of freedom (DOF) and may be controlled via the joints and their implemented actuators According to some… More
The structure of the brain is the most complex compared to other members of the body. Hence, in order to reduce the risks for the patient, precise planning, and careful decisions are necessary before surgical procedures are performed on this member. The surgical navigation system may be used in tasks… More
مقدمه : سرطان سینه ، یک عامل موثر در مرگ و میر خانم ها در سراسر جهان می باشد . از آنجایی که رادیولوژیست ها تنها در 75% موارد سرطان سینه را تشخیص میدهند، استفاده از روش های کمک تشخیصی کامپیوتری ضروری می باشد . مواد و روش ها :… More
Purpose In recent years, image-guided liver surgery based on intraoperative ultrasound (US) imaging has become common.Using an efficient point-based registration method to improve both accuracy and computational time for the registration of predeformation computer tomography, liver images with postdeformation US images are important during surgical procedure. Although iterative closest point… More
Purpose : To evaluate the current beliefs about the ways to reduce TRE value in image guided Sinus surgeries by rearranging the fiducial configuration, and investigating the best configurations for various surgical fields in a phantom study. Methods : A new CT-compatible skull phantom consisting of implanted targets was designed… More
Purpose The accuracy of pedicle screw placement during image-guided spine surgery (IGSS) can be characterized by estimating the target registration error (TRE). The major factors that influence TRE were identified, minimized, and verified with in vitro experiments. Materials and methods Computed-tomography-compatible markers are placed over anatomical landmarks of lumbar vertebral… More
Multimodality image registration plays a crucial role in various clinical and research applications. The aim of this study is to present an optimized MR to CT whole-body deformable image registration algorithm and its validation using clinical studies. A 3D intermodality registration technique based on B-spline transformation was performed using optimized… More
The configuration of landmarks is an important issue in minimizing the target registration error (TRE). In this paper the effect of different landmark configurations on the accuracy of pedicle screw placement during image guided spine surgery (IGSS) is investigated. Since the spine is deformed in intra-operative conditions compared to the… More
A method for automatically identifying landmark regions in 3D reconstructed CT images of vertebra is proposed using the Gaussian and mean curvature of each point. This method samples the anatomical regions in vertebra CT images which are critical in registration. These regions are well distinguished anatomical regions on a vertebra… More
Purpose: To evaluate different factors affecting target registration error (TRE) in pedicle screw placement during image-guided spine surgery(IGSS). Materials and methods: Computed tomography (CT)-compatible markers are placed over anatomical landmarks that are feasible and routinely used in surgical procedures. TRE is obtained directly for the marker that is placed on… More
