Results 51 to 60 of about 30,785,842 (283)

Contextual and variational contrast enhancement [PDF]

, 2011
This paper proposes an algorithm which enhances the contrast of an input image using inter-pixel contextual information. The algorithm uses a two-dimensional (2D) histogram of the input image constructed using mutual relationship between each pixel and ...
Tjahjadi, Tardi, T. Celik, T. Tjahjadi, Çelik, Turgay   +3 more
core   +1 more source

DataSheet1_Progression Patterns in Non-Contrast-Enhancing Gliomas Support Brain Tumor Responsiveness to Surgical Lesions.PDF

, 2022
Purpose: The overall benefit of surgical treatments for patients with glioma is undisputed. We have shown preclinically that brain tumor cells form a network that is capable of detecting damage to the tumor, and repair itself.
Philip Vogt (12676853), Nima Etminan (305664), Felix Sahm (126791), Miriam Ratliff (50838), Elena Maier (12676856), Erik Jung (12676859), Steffen Brenner (6789725), Wolfgang Wick (126794), Frank Winkler (6193829), Sebastian Hartzendorf (12676850)   +9 more
core   +1 more source

Non-contrast versus contrast-enhanced MR in the diagnosis of spondylitis: A quantitative concordance-analysis

European Journal of Radiology Open, 2020
Introduction: : Magnetic Resonance (MR) imaging using gadolinium contrast media is an essential imaging modality in diagnosing spondylitis. However, gadolinium contrast is not widely available in Indonesia and relatively expensive.
Marcel Prasetyo, Aldi Semanta Sirath, Krishna Pandu Wicaksono, Joedo Prihartono, Stefanus Imanuel Setiawan   +4 more
doaj   +1 more source

Non contrast enhanced volumetric histology of blood clots through high resolution propagation-based X-ray microtomography

Scientific Reports, 2022
We have demonstrated the capability of laboratory propagation-based microtomography (miroCT) in non-destructive 3D virtual histopathology of human blood clots without any contrast agent.
Somayeh Saghamanesh, Daniela Dimitriu LaGrange, Philippe Reymond, Isabel Wanke, Karl-Olof Lövblad, Antonia Neels, Robert Zboray   +6 more
doaj   +1 more source

Whole ureteric course delineation assessment using non contrast curved sagittal oblique reformatted CT

The Egyptian Journal of Radiology and Nuclear Medicine, 2016
Purpose: To develop a standardized technique to assess delineation of the whole ureter for the evaluation of symptomatizing urologic patients. Method and materials: 2500 patients are examined using 64-MDCT. Examinations were performed with oral hydration
Haisam Atta, Enas A. Abdel-Gawad, Ahmed ElAzab, Medhat Saleh, Wael A. Abbas, Radwa Soliman, Hisham Imam   +6 more
doaj   +1 more source

Virtual Non-Contrast images from dual energy CT angiography of the abdominal aorta and femoral arteries: Comparison with true Non-Contrast CT images.

British Journal of Radiology, 2022
OBJECTIVES To assess whether virtual non-contrast (VNC) computed tomography (CT) images acquired from dual-energy CT (DECT) have sufficient image quality to replace true non-contrast (TNC) CT images in CT angiography (CTAG). METHODS This study enrolled
Min-Hee Lee, H. Park, Ji Na Kim, Myung Sub Kim, S. Hong, Jai-Hyung Park, Ho-Kang Chang   +6 more
semanticscholar   +1 more source

Diagnostic accuracy of contrast and non-contrast 1.5 tesla magnetic resonance imaging for lumbar herniated nucleus pulposus based on surgical findings: A systematic review and meta-analysis of diagnostic test accuracy studies [PDF]

This study aims to provide the latest information regarding the accuracy of contrast and non-contrast 1.5 Tesla MRI in the diagnosis of lumbar Herniated Nucleus Pulposus (HNP) compared with surgical findings.
Budi Utomo, Budi, Tedy Apriawan, Tedy, Eko Agus Subagio, Eko, Endra Wibisono Harmawan, -, Muhammad Faris, Muhammad, Sri Andreani Utomo, -, Abdul Hafid Bajamal, Abdul   +6 more
core   +1 more source

Assessing Acute Pericarditis with T1 Mapping: A Supportive Contrast-Free CMR Marker

Tomography
Objective: The purpose of this study was to explore the impact of pericardial T1 mapping as a potential supportive non-contrast cardiovascular magnetic resonance (CMR) parameter in the diagnosis of acute pericarditis.
Riccardo Cau, Francesco Pisu, Roberta Montisci, Tommaso D’Angelo, Cesare Mantini, Rodrigo Salgado, Luca Saba   +6 more
doaj   +1 more source

Unique features of polycythemia observed on plain non contrast CT scan of head

Journal of Pediatric Neurosciences, 2010
We present two cases of polycythemia secondary to a congenital cardiac anomaly presenting with acute neurological complications showing hyperdense venous sinuses and cerebral vasculature in association with cerebral abscess.
S Gayathri, Akhila Prasad, Namrita Sachdeva, B P Baruah, Shailendra Aggarwal   +4 more
doaj   +1 more source

True Non-Contrast Phase versus Virtual-Non Contrast: “Lights and Shadows” of Dual Energy CT Angiography in Peripheral Arterial Disease

Applied Sciences, 2023
(1) Background: The value of dual-energy CT angiography (DE-CTA) in the detection of peripheral arterial disease (PAD) has been widely recognized. We aim to evaluate the diagnostic accuracy of virtual non-contrast (VNC) imaging of DE-CTA compared to true
Chiara Floridi, Laura Maria Cacioppa, Giacomo Agliata, Michaela Cellina, Nicolo’ Rossini, Tommaso Valeri, Martina Curzi, Alessandro Felicioli, Alessandra Bruno, Marzia Rosati, Roberto Candelari, Andrea Giovagnoni   +11 more
doaj   +1 more source