To investigate the role of Computer Tomography (CT) in the esophageal cancer surgery. 97 cases confirmed by pathology as esophageal cancer were retrospectively analyzed with preoperative Computer Tomography images and intraoperative situation. Tthe Computer Tomography can accurately display the thickness and length of the lesion segment esophageal wall, the relations between tumor and the aorta...

The long object problem is practically important and theoretically challenging. To solve the long object problem, spiral cone-beam CT was first proposed in 1991, and has been extensively studied since then. As a main feature of the next generation medical CT, spiral cone-beam CT has been greatly improved over the past several years, especially in terms of exact image reconstruction methods. Now...

trauma is the most common reason in 1-34 years olds. in patient with multiple traumas, the head is the most common involved part. the importance of computed tomography (ct scan) in diagnosis of brain trauma is well established and ct of the brain is a choice method. finding lesion in brain traumatic patient is very important so goal of this study is finding of brain ct scan in traumatic patient...

BACKGROUND The optimal diagnostic test for detecting acute pulmonary embolism (APE) is still under discussion. The ventilation /perfusion scanning has been the preferred examination for several decades, but with the development of new tests the diagnostic possibilities have increased. It is necessary to evaluate them from the cost-effectiveness perspective. The goal of this study was to evaluat...

In this paper a new technique is presented that extracts the geometry of lumbar vertebral bodies from spiral CT scans. Our new multi-step segmentation approach yields highly accurate and precise measurement of the bone mineral density (BMD) in different volumes of interest which are defined relative to a local anatomical coordinate systems. The approach also enables the analysis of the geometry...

Since the introduction of clinical CT great improvements in scan time, patient comfort and resolution have been made. The first clinical CT scanner dates from 1972 and was developed by Godfrey Hounsfield. It required an acquisition time of 5 minutes and reconstruction of one image took 7 minutes . In the following years CT systems improved rapidly and by 1976 acquisition time for one CT image h...