نتایج جستجو برای: four dimensional computed tomography
تعداد نتایج: 1227323 فیلتر نتایج به سال:
PURPOSE To validate, in the context of adaptive radiotherapy, three commercial software solutions for atlas-based segmentation. METHODS AND MATERIALS Fifteen patients, five for each group, with cancer of the Head&Neck, pleura, and prostate were enrolled in the study. In addition to the treatment planning CT (pCT) images, one replanning CT (rCT) image set was acquired for each patient during t...
In this paper, we present a real-time simulation and visualization framework that models a deformable surface lung model with tumor, simulates the tumor motion and predicts the amount of radiation doses that would be deposited in the moving lung tumor during the actual delivery of radiation. The model takes as input a subject-specific 4D Computed Tomography (4D CT) of lungs and computes a defor...
Erick Alexánderson Rosas,* Aloha Meave González, and Moisés Jiménez-Santos Departamento de Cardiologı́a Nuclear, División de Imagen Cardiovascular No Invasiva, Instituto Nacional de Cardiologı́a ‘‘Ignacio Chávez’’, Mexico City, Mexico Departamento de Resonancia Magnética y Tomografı́a Cardiaca, División de Imagen Cardiovascular No Invasiva, Instituto Nacional de Cardiologı́a ‘‘Ignacio Chávez’’, Mex...
Although endovascular aneurysm repair (EVAR) has become standard care for abdominal aortic (AAA), AAA sac enlargement due to endoleaks is a big concern after mid-term follow-up. Secondary intervention planned according type of diagnosed by conventional enhanced computed tomography (CT) or ultrasonography (US). However, accurate diagnosis often difficult, which resulted in inappropriate method s...
We present an adult patient who had an acute myocardial infarction complicated by a ventricular septal defect and had it repaired percutaneously. Real-time three-dimensional echocardiography (RT3D) before and during the closure procedure were performed. RT3D provided anatomical and functional information of the defect as well as real-time guidance during the procedure. This case highlights the ...
BACKGROUND Colorectal cancer (CRC) is the second most prevalent type of cancer in Europe. Early detection and removal of CRC or its precursor lesions by population screening can reduce mortality. Colonoscopy and computed tomography colonography (CT colonography) are highly accurate exams and screening options that examine the entire colon. The success of screening depends on the participation r...
Computed tomography (CT) colonography is the established successor to the barium enema for the detection of colonic neoplasia due to superior performance and patient experience. Consequently, CT colonography is widely disseminated across Western populations and increasingly provided by both subspecialist and general radiologists alike. As a result, CT colonography is now part of the core traini...
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