Search results for " tomography"
showing 10 items of 1487 documents
Effect of Computed Tomography on Diagnosis of Neurological Disease
1981
Computed tomography is generally considered to be the most reliable and, indeed, the definitive diagnostic technique for demonstration of brain tumors. Approximately 98% of intracra-nial lesions are detected with CT. However, extremely high sensitivity is not the only advantage of CT in diagnosis of intracranial tumors. Accuracy in determining histological type, visualization of anatomical relations to important brain structures, knowledge of the growth pattern, and evidence of space-occupying effects of the tumor are at least as important for the neurosurgeon. In effect, CT studies allow definition of the entire complex “intracranial space-occupying process” by means of a single procedure …
Role of computed tomography and magnetic resonance imaging in local complications of acute pancreatitis
2019
Acute pancreatitis (AP) represents a pancreas inflammation of sudden onset that can present different degrees of severity. AP is a frequent cause of acute abdomen and its complications are still a cause of death. Biliary calculosis and alcohol abuse are the most frequent cause of AP. Computed tomography (CT) and magnetic resonance imaging (MRI) are not necessary for the diagnosis of AP but they are fundamental tools for the identification of the cause, degree severity and AP complications. AP severity assessment is in fact one of the most important issue in disease management. Contrast-enhanced CT is preferred in the emergency setting and is considered the gold standard in patients with AP.…
Stump appendicitis. A case report
2016
Highlights • Stump appendicitis (SA) is a rare, but noteworthy, diagnosis that warrants early detection. • Delay in the diagnosis of SA may result in serious complications like stump gangrene, perforation and peritonitis. • More research is needed to identify strategies to prevent SA. • We underline the emergent role of lower endoscopy to clarify diagnosis resolve the symptoms. • Surgeons need to have a heightened awareness of the possibility of SA.
Halslymphknotenmetastasen: Histologisch kontrollierter Vergleich von Palpation, Sonographie und Computertomographie
1990
Sonography and CT were used pre-operatively for lymph node staging in patients with head and neck malignancies. The accuracy of the imaging methods surpassed that of palpation (palpation 85%, CT 85%, sonography 90%). Sensitivity was significantly increased from 74% (palpation) to 84% (CT) and 90% (sonography), ie. there was a reduction in false negative findings. Size of lymph nodes was not closely correlated with metastatic involvement. Reactively enlarged lymph nodes were more easily defined by CT and sonography than by palpation. This reduced the specificity of sonography (90%) and of CT (86%) compared to palpation (94%).
Fever of unknown origin and anaemia as a form of presentation of a rhabdomyosarcoma
2011
Abstract We report a case of fever of unknown origin, in its classical presentation. A wide range of studies were unrevealing, but finally a positron emission tomography/computed tomography allowed us to establish the diagnosis of rhabdomyosarcoma in the pelvic region.
Fat mass accumulation compromises bone adaptation to load in finnish women: A cross-sectional study spanning three generations
2010
Body weight and lean mass correlate with bone mass, but the relationship between fat mass and bone remains elusive. The study population consisted of 396 girls and 138 premenopausal mothers and 114 postmenopausal grandmothers of these girls. Body composition and tibial length were assessed using dual-energy X-ray absorptiometry (DXA), and bone traits were determined at the tibia using peripheral quantitative computed tomography (pQCT) in the girls at the ages of 11.2 ± 0.8, 13.2 ± 0.9, and 18.3 ± 1.0 years and in the mothers (44.7 ± 4.1 years) and grandmothers (70.7 ± 6.3 years). The values of relative bone strength index (RBSI), an index reflecting the ratio of bone strength to the load ap…
Sistema inteligente para protocolizar el diagnóstico de invasión ganglionar en el cáncer de laringe
2002
Laryngeal carcinoma is the most frequent malignant tumour in head and neck. Node invasion is known to be one of the most important prognostic factors. The aim of this study has been to design an intelligent system to perform a diagnostic algorithm of metastasic neck nodes. 122 clinical reports of patients diagnosed of laryngeal carcinoma in our department have been reviewed. The compiled data have been: tumor site, T stage, N stage (clinical, after CT scan and post-surgery). The method used to design the intelligent system has been the ID3, which is able to generate a minimal decision tree. Palpation has been the variable that has given more information about node invasion. CT has proved to…
Resting myocardial blood flow quantification using contrast-enhanced magnetic resonance imaging in the presence of stenosis: A computational fluid dy…
2015
Purpose: The extent to which atherosclerotic plaques affect contrast agent (CA) transport in the coronary arteries and, hence, quantification of myocardial blood flow (MBF) using magnetic resonance imaging (MRI) is unclear. The purpose of this work was to evaluate the influence of plaque induced stenosis both on CA transport and on the accuracy of MBF quantification. Methods: Computational fluid dynamics simulations in a high-detailed realistic vascular model were employed to investigate CA bolus transport in the coronary arteries. The impact of atherosclerosis was analyzed by inserting various medium- to high-grade stenoses in the vascular model. The influence of stenosis morphology was ex…
Left Renal Vein Anatomical Anomalies: Radiological and Surgical Implications
1998
Objective: To emphasize the incidence and clinical, diagnostic and surgical implications of left renal vein developmental anomalies. Design: Retrospective analysis of case notes. Setting: Clinical Anatomy Department and Surgery Department, Faculty of Medicine, University of Valencia, Spain. Patients, participants: Standard radiological examinations (CT scan) performed on 745 patients; surgical findings at operation in 128 patients with aorto-iliac atherosclerotic disease, and 72 donor cadavers for transplantation. Main outcome measures: Incidence of left renal vein anomalies (retro-aortic left renal vein and peri-aortic renal venous collar), based on radiological (CT scan) and surgical obse…
Spontaneous Resorption of an Occipital Meningocele: Computed Tomography and Magnetic Resonance Imaging Evaluation
2016
Cranial meningocele is a very rare variant of encephalocele. Meningocele can be associated with other disorders and may cause complications. Therapy is usually based on surgical treatment. To our knowledge, we describe the first case of spontaneous resorption of an occipital meningocele in a full-term newborn boy. A full-term newborn was noted to have a large non-skin covered, semitransparent cystic lump in the occipital bone. He underwent computed tomography and a diagnosis of meningocele was proposed. After a few hours, the cystic lump spontaneously readsorbed. After 1 week the patient underwent magnetic resonance. Histology confirmed the diagnosis.