Search Results - "Giraldo, Juan Carlos"

Renal Lesion Characterization with Spectral CT: Determining the Optimal Energy for Virtual Monoenergetic Reconstruction by Schabel, Christoph, Patel, Bhavik, Harring, Scott, Duvnjak, Petar, Ramírez-Giraldo, Juan Carlos, Nikolaou, Konstantin, Nelson, Rendon C, Farjat, Alfredo E, Marin, Daniele

“…Purpose To investigate the relationship between energy level of virtual monoenergetic (VM) imaging and sensitivity in the detection of minimally enhancing…”
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Influence of the Tertile of Birth on Anthropometric Variables, Anaerobic Parameters and Quantitative Muscle Ultrasound in School Children by García, Juan Carlos Giraldo, Hernández-Hernández, Elena

“…The relative age effect (RAE) has been studied and demonstrated in the literature. Our study evaluated the influence of birth tertile on anthropometric…”
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Performance evaluation of computed tomography systems: Summary of AAPM Task Group 233 by Samei, Ehsan, Bakalyar, Donovan, Boedeker, Kirsten L., Brady, Samuel, Fan, Jiahua, Leng, Shuai, Myers, Kyle J., Popescu, Lucretiu M., Ramirez Giraldo, Juan Carlos, Ranallo, Frank, Solomon, Justin, Vaishnav, Jay, Wang, Jia

“…Background The rapid development and complexity of new x‐ray computed tomography (CT) technologies and the need for evidence‐based optimization of image…”
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Dual-Source Dual-Energy CT With Additional Tin Filtration: Dose and Image Quality Evaluation in Phantoms and In Vivo by PRIMAK, Andrew N, RAMIREZ GIRALDO, Juan Carlos, EUSEMANN, Christian D, SCHMIDT, Bernhard, KANTOR, Birgit, FLETCHER, Joel G, MCCOLLOUGH, Cynthia H

“…The objective of this study was to investigate the effect on radiation dose and image quality of the use of additional spectral filtration for dual-energy CT…”
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Encoding the electrodynamics in spatiotemporal boundaries by Giraldo, Juan-Carlos, Peña, Néstor M., Ney, Michel M.

“…Maxwell’s equations represented by differential operators describe the local dependence between both electric and magnetic fields in every location of space…”
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Optimizing window settings for improved presentation of virtual monoenergetic images in dual‐energy computed tomography by Fu, Wanyi, Marin, Daniele, Ramirez‐Giraldo, Juan Carlos, Choudhury, Kingshuk Roy, Solomon, Justin, Schabel, Christoph, Patel, Bhavik N., Samei, Ehsan

“…Purpose Dual‐energy computed tomography virtual monoenergetic imaging (VMI) at 40 keV exhibits superior contrast‐to‐noise ratio (CNR), although practicing…”
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Impact of dual energy cardiac CT for metal artefact reduction post aortic valve replacement by Schwartz, Fides Regina, Tailor, Tina, Gaca, Jeffrey G., Kiefer, Todd, Harrison, Kevin, Hughes, G. Chad, Ramirez-Giraldo, Juan-Carlos, Marin, Daniele, Hurwitz, Lynne M.

“…•Dual-energy cardiac CT can reduce metal artefact from aortic valve replacements by up to 17 %.•Blended dual-energy reconstructions provide similar temporal…”
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Evaluating iterative reconstruction performance in computed tomography by Chen, Baiyu, Ramirez Giraldo, Juan Carlos, Solomon, Justin, Samei, Ehsan

“…Purpose: Iterative reconstruction (IR) offers notable advantages in computed tomography (CT). However, its performance characterization is complicated by its…”
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Iodine quantification to distinguish clear cell from papillary renal cell carcinoma at dual-energy multidetector CT: a multireader diagnostic performance study by Mileto, Achille, Marin, Daniele, Alfaro-Cordoba, Marcela, Ramirez-Giraldo, Juan Carlos, Eusemann, Christian D, Scribano, Emanuele, Blandino, Alfredo, Mazziotti, Silvio, Ascenti, Giorgio

“…To investigate whether dual-energy multidetector row computed tomographic (CT) imaging with iodine quantification is able to distinguish between clear cell and…”
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An angle-dependent estimation of CT x-ray spectrum from rotational transmission measurements by Lin, Yuan, Ramirez-Giraldo, Juan Carlos, Gauthier, Daniel J., Stierstorfer, Karl, Samei, Ehsan

“…Purpose: Computed tomography (CT) performance as well as dose and image quality is directly affected by the x-ray spectrum. However, the current assessment…”
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Characterization of Small Incidental Indeterminate Hypoattenuating Hepatic Lesions: Added Value of Single-Phase Contrast-Enhanced Dual-Energy CT Material Attenuation Analysis by Patel, Bhavik N, Rosenberg, Michael, Vernuccio, Federica, Ramirez-Giraldo, Juan Carlos, Nelson, Rendon, Farjat, Alfredo, Marin, Daniele

“…The objective of this study is to determine whether single-phase contrast-enhanced dual-energy CT (DECT) material attenuation analysis improves the…”
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Time-resolved, Cardiac-gated Computed Tomography After Endovascular Ascending Aortic and Arch Repair by Berczeli, Marton, Chinnadurai, Ponraj, Ramirez-Giraldo, Juan Carlos, Garami, Zsolt, Lumsden, Alan B., Atkins, Marvin D., Chang, Su Min

“…Better time-resolved imaging of stent grafts in the ascending aorta and arch accounting for cardiac motion is necessary to understand device-related…”
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Effect of a Noise-Optimized Second-Generation Monoenergetic Algorithm on Image Noise and Conspicuity of Hypervascular Liver Tumors: An In Vitro and In Vivo Study by Marin, Daniele, Ramirez-Giraldo, Juan Carlos, Gupta, Sonia, Fu, Wanyi, Stinnett, Sandra S, Mileto, Achille, Bellini, Davide, Patel, Bhavik, Samei, Ehsan, Nelson, Rendon C

“…The purpose of this study is to investigate whether the reduction in noise using a second-generation monoenergetic algorithm can improve the conspicuity of…”
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Use of a Noise Optimized Monoenergetic Algorithm for Patient-Size Independent Selection of an Optimal Energy Level During Dual-Energy CT of the Pancreas by Bellini, Davide, Gupta, Sonia, Ramirez-Giraldo, Juan Carlos, Fu, Wanyi, Stinnett, Sandra S, Patel, Bhavik, Mileto, Achille, Marin, Daniele

“…To investigate the impact of a second-generation noise-optimized monoenergetic algorithm on selection of the optimal energy level, image quality, and effect of…”
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Evaluating Lens Dose Reduction in Pediatric Neuroradiology Examinations Using Automated Kilovoltage Selection Software by Raudabaugh, Justin, Smith, Aaron K, Moore, Bria, Ramirez-Giraldo, Juan Carlos, Januzis, Natalie, Yoshizumi, Terry

“…The purpose of this study is to evaluate the potential of an automated kilo-voltage selection software for the reduction of lens dose in pediatric CT scans…”
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Dual-Source Single-Energy Multidetector CT Used to Obtain Multiple Radiation Exposure Levels within the Same Patient: Phantom Development and Clinical Validation by Bellini, Davide, Ramirez-Giraldo, Juan Carlos, Bibbey, Alex, Solomon, Justin, Hurwitz, Lynne M, Farjat, Alfredo, Mileto, Achille, Samei, Ehsan, Marin, Daniele

“…Purpose To develop, in a phantom environment, a method to obtain multidetector computed tomographic (CT) data sets at multiple radiation exposure levels within…”
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Differentiating Calcium Oxalate and Hydroxyapatite Stones In Vivo Using Dual-Energy CT and Urine Supersaturation and pH Values by Liu, Yu, MD, PhD, Qu, Mingliang, MD, Carter, Rickey E., PhD, Leng, Shuai, PhD, Ramirez-Giraldo, Juan Carlos, PhD, Jaramillo, Giselle, BS, Krambeck, Amy E., MD, Lieske, John C., MD, Vrtiska, Terri J., MD, McCollough, Cynthia H., PhD

“…Rationale and Objectives Knowledge of urinary stone composition can guide therapeutic intervention for patients with calcium oxalate (CaOx) or hydroxyapatite…”
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Entrevista realizada al profesor Juan Carlos Pacheco Giraldo , a raíz del lanzamiento de su libro Emociones para un nuevo mundo. Con una reflexión sobre la educación a futuros docentes de primera infancia en la Universidad by Torres Hurtado, Christian, Pacheco Giraldo, Juan Carlos

“…Entrevista realizada al profesor Juan Carlos Pacheco por el lanzamiento de su libro Emociones para un nuevo mundo. Con una reflexión sobre la educación a…”
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Noise Reduction to Decrease Radiation Dose and Improve Conspicuity of Hepatic Lesions at Contrast-Enhanced 80-kV Hepatic CT Using Projection Space Denoising by EHMAN, Eric C, GUIMARAES, Luis S, SCOTT HARMSEN, W, FLETCHER, Joel G, FIDLER, Jeff L, TAKAHASHI, Naoki, RAMIREZ-GIRALDO, Juan Carlos, LIFENG YU, MANDUCA, Armando, HUPRICH, James E, MCCOLLOUGH, Cynthia H, HOLMES, David

“…The purpose of this study was to investigate the combined potential of 80-kV CT and noise reduction using a projection space denoising algorithm to reduce…”
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Evaluation of the use of automatic exposure control and automatic tube potential selection in low-dose cerebrospinal fluid shunt head CT by Wallace, Adam N., Vyhmeister, Ross, Bagade, Swapnil, Chatterjee, Arindam, Hicks, Brandon, Ramirez-Giraldo, Juan Carlos, McKinstry, Robert C.

“…Introduction Cerebrospinal fluid shunts are primarily used for the treatment of hydrocephalus. Shunt complications may necessitate multiple non-contrast head…”
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