Quantitative and qualitative evaluation of low-dose craniocervical computed tomography angiography with a lower tube voltage protocol.

CONCLUSION: In CCCTA, the 100-kVp protocol increased arterial enhancement, reduced the radiation dose, and would not cause prominent streak artifacts. This protocol should be considered for CCCTA. PMID: 30732454 [PubMed - as supplied by publisher]
Source: Acta Radiologica - Category: Radiology Authors: Tags: Acta Radiol Source Type: research

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Conclusions: The successful treatment of this patient was the result of the collaboration between the neurology and neuroradiology departments.The first therapeutic option in carotid dissection has to be stenting, under certain conditions. PMID: 31803282 [PubMed]
Source: Journal of Medicine and Life - Category: General Medicine Tags: J Med Life Source Type: research
Authors: Xu J, Wang X, Xiao H, Xu J Abstract BACKGROUND To determine the difference in size-specific dose estimates (SSDEs), separately based on effective diameter (deff) and water equivalent diameter (dw) of the central slice of the scan range in computed tomography coronary angiography (CTCA). MATERIAL AND METHODS There were 134 patients who underwent CTCA examination, were electronically retrieved. SSDEs (SSDEdeff and SSDEdw) were calculated using 2 approaches: deff and dw. The median SSDEs and mean absolute relative difference of SSDEs were calculated. Linear regression model was used to assess the absolute rel...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Objectives The aim of this study was to compare image quality, conspicuity, and endoleak detection between single-energy low-kV images (SEIs) and dual-energy low-keV virtual monoenergetic images (VMIs+) in computed tomography angiography of the aorta after endovascular repair. Materials and Methods An abdominal aortic aneurysm phantom simulating 36 endoleaks (2 densities; diameters: 2, 4, and 6 mm) in a medium- and large-sized patient was used. Each size was scanned using single-energy at 80 kVp (A) and 100 kVp (B), and dual-energy at 80/Sn150kVp for the medium (C) and 90/Sn150kVp for the large size (D). VMIs+ at 40 k...
Source: Investigative Radiology - Category: Radiology Tags: Original Articles Source Type: research
Abstract OBJECTIVE: Netrin-1 has been shown to play a role in the initiation of atherosclerosis in mice models. However, little is known about the role of Netrin-1 in humans. We set out to study whether Netrin-1 is associated with different stages of atherosclerosis. Approach and Results: Plasma Netrin-1 levels were measured in different patient cohorts: (1) 22 patients with high cardiovascular risk who underwent arterial wall inflammation assessment using positron-emission tomography / computed tomography, (2) 168 patients with a positive family history of premature atherosclerosis in whom coronary artery calcium...
Source: Arteriosclerosis, Thrombosis and Vascular Biology - Category: Cardiology Authors: Tags: Arterioscler Thromb Vasc Biol Source Type: research
We present the case of a 69 years-old man, with an insidious and progressive palsy of the III left CN with 6 months of evolution. CT scan revealed a 1,2 cm lesion located at the suprasellar and pre-pontine cistern at the free edge of the tentorium, initially compatible with the diagnosis of a small meningioma. He was submitted to surgery but surprisingly histopathological analysis revealed a cavernous malformation, intrinsic to the nerve.This is the twelfth reported case of an III cranial nerve CM, and the management of this lesions still doesn't have clear and definitive recommendations regarding treatment. In selected ca...
Source: Interdisciplinary Neurosurgery - Category: Neurosurgery Source Type: research
ConclusionTraumatic dACA aneurysm is a rare complication of brain trauma. Delayed intracranial haemorrhage and the sudden deterioration of neurologic function were the typical characteristics in patients with traumatic dACA aneurysm. CTA is the first-line screening modality for patients who present with intracerebral haemorrhage in the corpus callosum after trauma, particularly for patients who are older, in a poorer or critical condition. When the aneurysm is located in the A4 segment or involves a small branch, surgical trapping is the preferred definitive therapy to prevent further growth and disastrous bleeding. Early ...
Source: Acta Neurochirurgica - Category: Neurosurgery Source Type: research
Abstract Background: Functional assessment to rule out myocardial ischemia using coronary computed tomography angiography (CCTA) is extremely important and data on the Brazilian population are still limited. Objective: To assess the diagnostic performance of myocardial perfusion by CCTA in the detection of severe obstructive coronary artery disease (CAD) compared with single-photon emission computerized tomography (SPECT). To analyze the importance of anatomical knowledge to understand the presence of myocardial perfusion defects on SPECT imaging that is not identified on computed tomography (CT) scan. Method: A total of 3...
Source: Arquivos Brasileiros de Cardiologia - Category: Cardiology Source Type: research
Abstract Background: Functional assessment to rule out myocardial ischemia using coronary computed tomography angiography (CCTA) is extremely important and data on the Brazilian population are still limited. Objective: To assess the diagnostic performance of myocardial perfusion by CCTA in the detection of severe obstructive coronary artery disease (CAD) compared with single-photon emission computerized tomography (SPECT). To analyze the importance of anatomical knowledge to understand the presence of myocardial perfusion defects on SPECT imaging that is not identified on computed tomography (CT) scan. Method: A total of 3...
Source: Arquivos Brasileiros de Cardiologia - Category: Cardiology Source Type: research
Publication date: August 2019Source: Revista Portuguesa de Cardiologia (English Edition), Volume 38, Issue 8Author(s): Beatriz Saldanha Santos, Maria João FerreiraAbstractNon-invasive assessment of ischemic heart disease remains a challenging task, even with a large armory of diagnostic modalities. Positron emission tomography (PET) is an advanced radionuclide technique that has been available for decades. Originally used as a research tool that contributed to advances in the understanding of cardiovascular pathophysiology, it is now becoming established in clinical practice and is increasingly used in the diagnosis...
Source: Revista Portuguesa de Cardiologia - Category: Cardiology Source Type: research
CONCLUSIONS: The current diagnostic models for PE lead to a large number of unnecessary explorations. The new models could reduce the number of APTC although with a minimum risk of false negatives. PMID: 31780215 [PubMed - as supplied by publisher]
Source: Medicina Clinica - Category: General Medicine Tags: Med Clin (Barc) Source Type: research
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