نتایج جستجو برای: ct matching
تعداد نتایج: 235418 فیلتر نتایج به سال:
Background: A series of biochemical reactions are involved in the endogenous production of estrogens. Their final and rate-limiting step is catalyzed by aromatase belonging to the class XIX of cytochrome P450. CYP19 is a key enzyme for estrogen synthesis in males. It catalyzes the irreversible conversion of androstenedione and testosterone to estrone and estradiol-17&beta, respectively. Aromata...
In this paper we present a computer aided detection (CAD) system for colonic polyp detection in computed tomography (CT) images. Here, the segmentation of the colon region was performed in three steps which are thresholding, labeling and analyzing the shape morphologies using decision rules. After extracting the colon region, searching with 3D semi-spherical polyp template was performed to dete...
عملیات تناظریابی عکسی (image matching) در تولید مدل رقومی زمین (dtm) همواره با مشکلات و تنگناهایی مواجه بوده است . برای حل مسئله تناظریابی، الگوریتمها و روشهای متنوعی پیشنهاد گردیده است اما عواملی از قبیل شیب سطوح شیء، اختلاف در موقعیت و حالات دوربین در دو لحظه عکسبرداری، شرایط روشنایی، انعکاس و ... تا حد قابل توجهی شباهت دو عکس را مخدوش می نماید بطوریکه دستیابی به نقاط متناظر را دچار اشکال می ...
When Industrial Computerized Tomography (CT) techniques are adopted to inspect quality of industrial products, we lay emphases on their installation validity or inner defects. In order to do so, we always try to perform matching operation between reference object and test objects. However, conventional image matching methods can’t meet on-line detection demand because of their slow recognition ...
introduction: mandibular fracture is the most common facial bone fracture due to facial trauma. a variety of imagings have been used for diagnosis of mandibular fractures. however, the choice of imaging for diagnosis of mandibular fractures is controversial.present study compares the accuracy of the three most common imaging methods in mandibular fracture diagnosis panoramic radiography, corona...
In order to study ventilation or to extract other functional information of the lungs, intra-patient matching of scans at a different inspiration level is valuable as an examination tool. In this paper, a method for robust 3D tree matching is proposed as an independent registration method or as a guide for other, e.g. voxel-based, types of registration. For the first time, the 3D tree is repres...
Background: No previous study has investigated the computed tomography (CT) characteristics of follicular thyroid adenoma (FTA) and follicular thyroid carcinoma (FTC). This study aimed to compare the CT features of FTA and FTC. Methods: Eighty-seven consecutive patients with FTA or FTC that underwent preoperative neck CT from January 2006 to December 2013 were included. In each case, single rad...
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