Results 41 to 50 of about 40,683 (297)

Influence of Pitch on Surface Dose Distribution and Image Noise of Computed Tomography Scans

Sensors, 2023
This study evaluated the effect of pitch on 256-slice helical computed tomography (CT) scans. Cylindrical water phantoms (CWP) were measured using axial and helical scans with various pitch values. The surface dose distributions of CWP were measured, and
Kenji Yamada, Yoshiki Kawata, Masafumi Amano, Hidenobu Suzuki, Masahide Tominaga, Motoharu Sasaki, Hikaru Nishiyama, Masafumi Harada, Noboru Niki   +8 more
doaj   +1 more source

PWLS-ULTRA: An Efficient Clustering and Learning-Based Approach for Low-Dose 3D CT Image Reconstruction

, 2018
The development of computed tomography (CT) image reconstruction methods that significantly reduce patient radiation exposure while maintaining high image quality is an important area of research in low-dose CT (LDCT) imaging.
Fessler, Jeffrey A., Long, Yong, Ravishankar, Saiprasad, Zheng, Xuehang   +3 more
core   +1 more source

Real time evaluation of overranging in helical computed tomography [PDF]

Physica Medica, 2014
5 figures, 3 ...
Trevisan, Diego, Bonutti, Faustino, Ravanelli, Daniele, Valentini, Aldo   +3 more
openaire   +3 more sources

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende, Emilien Petit, Young Woo Park, Sophie Tezenas du Montcel, James M. Joers, Jonathan M. DuBois, H. Moore Arnold, Michal Povazan, Ipek Özdemir, Guita Banan, Romain Valabregue, Philipp Ehses, Jennifer Faber, Chiadi U. Onyike, Peter B. Barker, Jeremy D. Schmahmann, Eva‐Maria Ratai, Sub H. Subramony, Thomas H. Mareci, Khalaf O. Bushara, Henry Paulson, Thomas Klockgether, Alexandra Durr, Tetsuo Ashizawa, Christophe Lenglet, Gülin Öz, READISCA Investigators   +26 more
wiley   +1 more source

Diagnostic Performance of Quadruple Phase Multidetector Row Computed Tomography in Hepatoma: Comparison with Histopathological Diagnosis

Journal of the Dow University of Health Sciences, 2018
Objective: To determine diagnostic accuracy of quadruple phase helical computed tomography scan in detection of hepatocellular carcinoma in individuals with hepatitis B and C, keeping histopathology as the gold standard.
Saadia Sarwar Soomro, Muhammad Saad Ahmed, Sheeza Imtiaz, Waseem Mehmood Nizamani, Muhammad Kashif Shazlee, Saifullah Obaidullah   +5 more
doaj   +2 more sources

Cancer of the Pancreas: The Best Image for Early Detection – CT, MRI, PET or US?

Canadian Journal of Gastroenterology, 2002
Pancreatic cancer has a poor prognosis, and the best chance for survival is to diagnose the tumour at an early stage. Abdominal ultrasound, computed tomography, magnetic resonance imaging and endoscopic retrograde cholangiopancreatography are the most ...
Anthony E Hanbidge
doaj   +1 more source

State of the art: iterative CT reconstruction techniques [PDF]

, 2015
Owing to recent advances in computing power, iterative reconstruction (IR) algorithms have become a clinically viable option in computed tomographic (CT) imaging. Substantial evidence is accumulating about the advantages of IR algorithms over established
Bastarrika, Gorka, DE CECCO, CARLO NICOLA, Geyer, Lucas L., LAGHI, ANDREA, Leipsic, Jonathon A., Meinel, Felix G., Nance, John W., Paul, Narinder S., RENGO, MARCO, Schoepf, U. Joseph   +9 more
core   +1 more source

Functional and Structural Evidence of Neurofluid Circuit Aberrations in Huntington Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Disrupted neurofluid regulation may contribute to neurodegeneration in Huntington disease (HD). Because neurofluid pathways influence waste clearance, inflammation, and the distribution of central nervous system (CNS)–delivered therapeutics, understanding their dysfunction is increasingly important as targeted treatments emerge.
Kilian Hett, Abigail Dubois, Melanie Leguizamon, Alexander Song, Paula Trujillo, Colin D. McKnight, Ciaran M. Considine, Manus J. Donahue, Daniel O. Claassen   +8 more
wiley   +1 more source

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano, Giacomo Boffa, Maria Petracca, Marta Ponzano, Nicole Graziano, Claire Wigley, Claire Riley, Jonathan Howard, Pietro Bontempi, Sylvia Klineova, Fred Lublin, Matilde Inglese   +11 more
wiley   +1 more source

Evaluation of Motion Artifact Metrics for Coronary CT Angiography [PDF]

, 2018
Purpose This study quantified the performance of coronary artery motion artifact metrics relative to human observer ratings. Motion artifact metrics have been used as part of motion correction and best‐phase selection algorithms for Coronary Computed ...
Contijoch, Desjardins, Gaemperli, Hollander, Husmann, Johnson, Kendall, Kim, Kyriakou, Manzke, Mowatt, Parzen, Phelps, Plank, Rohkohl, Stassi, Tang, Vembar, Warfield, Wick   +19 more
core   +2 more sources