Quality of an image can be described in terms of contrast, spatial resolution, noise, and artefacts [2]. Contrast is defined as 'the separation between the darkest and brightest areas of the image' [3]. In this article, brain tissue contrast exhibited by CT and MRI is discussed in detail...
Objective To explore applied value on CT and Brain Atlas (BA) in diagnosis of acute cerebrovascular diseases and compare the contrast between them. Methods Brain Atlas (BA) and CT were exmined in 718 patients with a-cute cerebrovascular disease and contrasted with each othes. Results BA and ...
Non contrast CT scan (a) shows hyperdense lesion with small foci of calcification in the left caudate nucleus and intraventricular hemorrhage (IVH) in posterior horns of lateral ventricles. Coronal (b) and axial (c) cuts of brain CTA shows left caudate nucleus arteriovenous malformation (AVM) w...
rapid progression, high mortality rate, and long-term impact on the ability to function. Non-contrast agent-based CT (NCCT) is a common method for evaluating and identifying HICH. Recent radiomics in image processing and...
Delineation of various target volumes using contrast-enhanced magnetic resonance imaging (MRI) and/or computed tomography (CT) constitutes the primary step for radiation therapy planning (RTP) in brain tumors. This study presents a quantification and comparative evaluation of the various clinical target...
Purpose In order to achieve comparability of image quality, harmonisation of PET system performance is imperative. In this study, prototype harmonisation criteria for PET brain studies were developed. Methods Twelve clinical PET/CT systems (4 GE, 4 Philips, 4 Siemens, including SiPM-based "digital...
探究缩短氘代-氟[18F]丙那嗪(18F-D6-AV133)PET/CT采集时间对图像质量及帕金森病诊断效能的影响,减少长时间显像造成的运动伪影。 资料与方法 回顾性选取2021年10月—2022年6月广州医科大学附属第一医院帕金森病患者27例与健康对照者2...
[22]. Other deep learning techniques, such as generative adversarial networks, have been used to synthetically improve the visualization of brain MRI findings by simulating full-dose contrast enhancement in patients receiving no or reduced amounts of gadolinium [23,24]. In these scenarios, machine ...
contrast agent. We herein show how the injection of albumin-stabilised 5 nm CeO2NPs into mice revealed substantial enhancement in X-ray contrast, reaching up to a tenfold increase at significantly lower concentrations than commercial or other proposed contrast agents. Remarkably, these NPs exhibited...
while CT uses X-rays to produce images. Plain X-rays are an inexpensive, quick test and are accurate at diagnosing things such aspneumonia,arthritis, and fractures. CT and MRI better to evaluate soft tissues such as the brain,liver, and abdominal organs, as well as to visualize subtle abno...