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https://www.readbyqxmd.com/read/29352608/differences-in-lung-injury-after-imrt-or-proton-therapy-assessed-by-18fdg-pet-imaging
#1
Nadya Shusharina, Zhongxing Liao, Radhe Mohan, Amy Liu, Andrzej Niemierko, Noah Choi, Thomas Bortfeld
BACKGROUND AND PURPOSE: To compare lung injury among non-small cell lung cancer (NSCLC) patients treated with IMRT or proton therapy as revealed by 18F-FDG post-treatment uptake and to determine factors predictive for clinically symptomatic radiation pneumonitis. MATERIAL AND METHODS: For 83 patients treated with IMRT or proton therapy, planning CT and follow up 18F-FDG PET-CT were analyzed. Post-treatment PET-CT was aligned with planning CT to establish a voxel-to-voxel correspondence between PET and planning dose images...
January 15, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29352568/dual-energy-computed-tomography-should-be-a-first-line-preoperative-localization-imaging-test-for-primary-hyperparathyroidism-patients
#2
Jake Hiebert, Cameron Hague, Shangmei Hou, Sam M Wiseman
BACKGROUND: The objective of this study was to evaluate the performance of dual-energy computed tomography (DECT) for preoperative parathyroid tumor (PT) localization in primary hyperparathyroid (PHP) patients. METHODS: A retrospective review was carried out of the medical records of all PHP patients who underwent ultrasound (US), Tc-99m sestamibi noncontrast single photon emission computed tomography (CT-MIBI), DECT and parathyroidectomy at a single center. RESULTS: The sensitivities and accuracies for preoperative PT localization in the 97 patient study population were: US 40% and 93%, CT-MIBI 64...
January 5, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29352406/does-biopsy-needle-traversing-through-central-portion-of-lesion-increase-the-risk-of-hemoptysis-during-percutaneous-transthoracic-needle-biopsy
#3
Chia-Hung Chen, Wei-Ming Huang, Shih-Hsuan Liang, Zong-Yi Jhou, Chien-Wen Chen, Yu-Chan Chien, Hui-Chen Lin, Chih-Hsin Wang, Chun-Chao Huang, Wei-Ni Liao, Chung-Yao Huang
PURPOSE: To evaluate whether traversal through the central part of a pulmonary lesion by a biopsy needle, and other factors, increases the risk of hemoptysis in patients undergoing CT-guided percutaneous transthoracic needle biopsy (PTNB). MATERIALS AND METHODS: From July 2012 to November 2016, 227 patients undergoing 233 procedures were recruited as our study population. Patients were classified according to the occurrence of hemoptysis. Radiological assessments were performed by reviewing multiplanar reconstructed CT images...
January 19, 2018: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29352381/myocardial-perfusion-in-patients-with-suspected-coronary-artery-disease-comparison-between-320-mdct-and-rubidium-82-pet
#4
Roberto Nery Dantas, Antonildes Nascimento Assuncao, Ismar Aguiar Marques, Mateus Guimaraes Fahel, Cesar Higa Nomura, Luiz Francisco Rodrigues Avila, Maria Clementina Pinto Giorgi, Jose Soares, Jose Claudio Meneghetti, Jose Rodrigues Parga
OBJECTIVES: Despite advances in non-invasive myocardial perfusion imaging (MPI) evaluation, computed tomography (CT) multiphase MPI protocols have not yet been compared with the highly accurate rubidium-82 positron emission tomography (82RbPET) MPI. Thus, this study aimed to evaluate agreement between 82RbPET and 320-detector row CT (320-CT) MPI using a multiphase protocol in suspected CAD patients. METHODS: Forty-four patients referred for MPI evaluation were prospectively enrolled and underwent dipyridamole stress 82RbPET and multiphase 320-CT MPI (five consecutive volumetric acquisitions during stress)...
January 19, 2018: European Radiology
https://www.readbyqxmd.com/read/29352379/magnetic-resonance-with-diffusion-weighted-imaging-improves-assessment-of-focal-liver-lesions-in-patients-with-potentially-resectable-pancreatic-cancer-on-ct
#5
Sun Kyung Jeon, Jeong Min Lee, Ijin Joo, Dong Ho Lee, Su Joa Ahn, Hyunsik Woo, Myoung Seok Lee, Jin-Young Jang, Joon Koo Han
PURPOSE: To investigate added value of MRI to preoperative staging MDCT for evaluation of focal liver lesions (FLLs) in potentially resectable pancreatic ductal adenocarcinomas (PDACs). MATERIALS AND METHODS: In patients with potentially resectable PDACs after staging MDCT (n=167), characteristics of FLLs were scored as benign, indeterminate or metastases on an MDCT set and combined MDCT and MRI set by two readers, independently. Size of hepatic lesions was measured and detection rate of hepatic metastasis unsuspected by MDCT and diagnostic yield of MRI for FLLs were assessed...
January 19, 2018: European Radiology
https://www.readbyqxmd.com/read/29352372/improving-pet-quantification-of-small-animal-68ga-dota-labeled-pet-ct-studies-by-using-a-ct-based-positron-range-correction
#6
Jacobo Cal-Gonzalez, Juan José Vaquero, Joaquín L Herraiz, Mailyn Pérez-Liva, María Luisa Soto-Montenegro, Santiago Peña-Zalbidea, Manuel Desco, José Manuel Udías
PURPOSE: Image quality of positron emission tomography (PET) tracers that emits high-energy positrons, such as Ga-68, Rb-82, or I-124, is significantly affected by positron range (PR) effects. PR effects are especially important in small animal PET studies, since they can limit spatial resolution and quantitative accuracy of the images. Since generators accessibility has made Ga-68 tracers wide available, the aim of this study is to show how the quantitative results of [68Ga]DOTA-labeled PET/X-ray computed tomography (CT) imaging of neuroendocrine tumors in mice can be improved using positron range correction (PRC)...
January 19, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29352189/mechanical-behavior-of-a-soft-hydrogel-reinforced-with-three-dimensional-printed-microfibre-scaffolds
#7
Miguel Castilho, Gernot Hochleitner, Wouter Wilson, Bert van Rietbergen, Paul D Dalton, Jürgen Groll, Jos Malda, Keita Ito
Reinforcing hydrogels with micro-fibre scaffolds obtained by a Melt-Electrospinning Writing (MEW) process has demonstrated great promise for developing tissue engineered (TE) constructs with mechanical properties compatible to native tissues. However, the mechanical performance and reinforcement mechanism of the micro-fibre reinforced hydrogels is not yet fully understood. In this study, FE models, implementing material properties measured experimentally, were used to explore the reinforcement mechanism of fibre-hydrogel composites...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29351787/scl20a2-mutation-presenting-with-acute-ischemic-stroke-a-case-report
#8
Xiaoyu Zhang, Gaoting Ma, Zhangning Zhao, Meijia Zhu
BACKGROUND: Primary familial brain calcification (PFBC) is a rare disorder characterized by distinctive bilateral brain calcification and variable clinical presentations. However, cerebrovascular attack was rarely reported in PFBC patients. We here reported a SLC20A2 mutation patient presenting with acute ischemic stroke. CASE PRESENTATION: A 56 years old man was transferred to our hospital because of 6 days of melena and 3 days of somnolence, agitation and mood changes...
January 19, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29351655/establishing-diagnostic-reference-levels-for-cardiac-computed-tomography-angiography-in-saudi-arabia
#9
Ali B Alhailiy, Peter L Kench, Mark F McEntee, Patrick C Brennan, Elaine A Ryan
Cardiac computed tomography angiography (CCTA) is a commonly used diagnostic imaging tool for cardiovascular disease. Despite constant improvements to imaging technologies, the radiation dose to patients remains a concern when using this procedure. Diagnostic reference levels (DRLs) are used as a trigger to identify and alert individual facilities that are using high doses during CT. This study aims to assess patient radiation dose and establish new national DRLs (NDRL) associated with CCTA in Saudi clinical practices...
January 17, 2018: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29351615/18f-fluorodeoxyglucose-positron-emission-computed-tomography-and-computed-tomography-angiography-in-prosthetic-heart-valve-endocarditis-from-guidelines-to-clinical-practice
#10
Laurens E Swart, Asbjørn M Scholtens, Wilco Tanis, Koen Nieman, Ad J J C Bogers, Fred J Verzijlbergen, Gabriel P Krestin, Jolien W Roos-Hesselink, Ricardo P J Budde
The timely diagnosis of prosthetic heart valve endocarditis remains challenging yet of utmost importance. 18F-fluorodeoxyglucose (18 F-FDG) positron emission/computed tomography (PET/CT) and cardiac computed tomography angiography (CTA) were recently introduced as additional diagnostic tools in the most recent ESC guidelines on infective endocarditis. However, how to interpret PET/CT findings with regard to what is to be considered abnormal, what the potential confounders may be, as well as which patients benefit most from these additional imaging techniques and how to best perform them in these often-complex patients, remains unclear...
January 16, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29351124/feasibility-assessment-of-yttrium-90-liver-radioembolization-imaging-using-amplitude-based-gated-pet-ct
#11
Dustin R Osborne, Shelley N Acuff, Melissa L Neveu, Mumtaz Syed, Austin D Kaman, Yitong Fu
PURPOSE: The usage of PET/computed tomography (CT) to monitor hepatocellular carcinoma patients following yttrium-90 (Y) radioembolization has increased. Respiratory motion causes liver movement, which can be corrected using gating techniques at the expense of added noise. This work examines the use of amplitude-based gating on Y-PET/CT and its potential impact on diagnostic integrity. PATIENTS AND METHODS: Patients were imaged using PET/CT following Y radioembolization...
January 18, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29351123/accuracy-of-18f-naf-pet-ct-in-bone-metastasis-detection-and-its-effect-on-patient-management-in-patients-with-breast-carcinoma
#12
Wouter A M Broos, Friso M van der Zant, Maurits Wondergem, Remco J J Knol
OBJECTIVE: Determination of the accuracy of sodium fluorine-18-fluoride (F-NaF) PET/computed tomography (CT) for the evaluation of bone metastases, and the impact on patient management in breast cancer patients. PATIENTS AND METHODS: Patients with breast cancer, referred for F-NaF PET/CT between February 2014 and June 2016, were included in a database. Baseline characteristics, clinical indication, definitive diagnosis according to follow-up data, as well as changes in patient management were recorded...
January 18, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29350878/perfusion-ct-in-posterior-circulation-stroke-predictors-and-prognostic-implications-of-focal-hypoperfusion
#13
Lars-Peder Pallesen, Dimitris Lambrou, Ashraf Eskandari, Jessica Barlinn, Kristian Barlinn, Heinz Reichmann, Vincent Dunet, Philippe Maeder, Volker Puetz, Patrik Michel
BACKGROUND: We aimed to determine predictors of focal hypoperfusion on CT Perfusion (CTP) in patients with acute posterior circulation stroke and its association with long-term outcome. METHODS: We selected patients with posterior circulation stroke from the Acute STroke Registry and Analysis of Lausanne (ASTRAL) who underwent CTP within 24 hours of stroke onset as part of the stroke imaging protocol. Hypoperfusion was defined as an area of visually well demarcated mean-transit-time (MTT) prolongation corresponding to an arterial territory on standard reconstruction CTP imaging maps...
January 19, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29350644/talar-fractures-radiological-and-ct-evaluation-and-classification-systems
#14
Giuseppe Caracchini, Michele Pietragalla, Alioscia De Renzis, Michele Galluzzo, Mattia Carbone, Marcello Zappia, Anna Russo, Federico Greco, Vittorio Miele
INTRODUCTION: The talus is the second largest bone of the foot. It is fundamental to ensure normal ankle-foot movements as it connects the leg and the foot. Talar fractures are usually due to high energy traumas (road accidents, high level falls). They are not common as they account for 3-5% of ankle and foot fractures and 0.85% of all body fractures. However, talar fractures not correctly diagnosed and treated can lead to avascular necrosis of the astragalus, pseudoarthrosis, early osteoarthrisis and ankle instability, declining the quality of life of patients...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29350643/calcaneal-fractures-radiological-and-ct-evaluation-and-classification-systems
#15
Michele Galluzzo, Federico Greco, Michele Pietragalla, Alioscia De Renzis, Mattia Carbone, Marcello Zappia, Nicola Maggialetti, Alfredo D'andrea, Giuseppe Caracchini, Vittorio Miele
BACKGROUND AND AIM OF THE WORK: The calcaneus, the more lower bone of the body, has the task of supporting the axial load from the weight of the body. Calcaneal fractures represent about 1-2% of all fractures and 60% of the tarsal bones fractures. The articular involvement has been associated with a poor functional outcome. The aim of this work is to describe the radiologic evaluation, the classification systems, the morphological preoperative diagnostic imaging features of calcaneal fractures, highlighting the correlation with the choice of treatment and predictive capacity for the fracture surgical outcome...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29350642/acute-and-overuse-elbow-trauma-radio-orthopaedics-overview
#16
Elisabetta Antonia Nocerino, Davide Cucchi, Paolo Arrigoni, Marco Brioschi, Cristiano Fusi, Eugenio A Genovese, Carmelo Messina, Pietro Randelli, Carlo Masciocchi, Alberto Aliprandi
The correct management of acute, subacute and overuse-related elbow pathologies represents a challenging diagnostic and therapeutic problem. While major trauma frequently requires a rapid surgical intervention, subluxation and minor trauma allow taking more time for diagnostics and planning the correct elective treatment after careful clinical and radiological investigation. In these conditions, communication between orthopaedic surgeon and radiologist allow to create a detailed radiology report, tailored to the patient's and surgeon's needs and optimal to plan proper management...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29350636/imaging-of-pediatric-foot-disorders
#17
Alfonso Reginelli, Anna Russo, Fabrizio Turrizziani, Roberto Picascia, Elisa Micheletti, Vittoria Galeazzi, Umberto Russo, Assunta Sica, Fabrizio Cioce, Alberto Aliprandi, Andrea Giovagnoni, Salvatore Cappabianca
Infants and children undergo imaging studies to evaluate a wide variety of congenital and acquired disorders. Imaging protocols have to consider the patient's comfort, level of anxiety, and smaller size. The first imaging study is usually made with plain radiographs. The routine radiographic examination of the foot includes the anteroposterior (AP), lateral, and oblique projections. Magnetic Resonance Imaging (RMI) provides excellent anatomic detail of cartilage, vasculature and soft tissue thanks to superior soft tissue contrast and spatial resolution, so is valuable in many cases...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29350579/evaluation-of-respiratory-motion-corrected-cone-beam-ct-at-end-expiration-in-abdominal-radiotherapy-sites-a-prospective-study
#18
Russell E Kincaid, Agung E Hertanto, Yu-Chi Hu, Abraham J Wu, Karyn A Goodman, Hai D Pham, Ellen D Yorke, Qinghui Zhang, Qing Chen, Gig S Mageras
BACKGROUND: Cone beam computed tomography (CBCT) for radiotherapy image guidance suffers from respiratory motion artifacts. This limits soft tissue visualization and localization accuracy, particularly in abdominal sites. We report on a prospective study of respiratory motion-corrected (RMC)-CBCT to evaluate its efficacy in localizing abdominal organs and improving soft tissue visibility at end expiration. MATERIAL AND METHODS: In an IRB approved study, 11 patients with gastroesophageal junction (GEJ) cancer and five with pancreatic cancer underwent a respiration-correlated CT (4DCT), a respiration-gated CBCT (G-CBCT) near end expiration and a one-minute free-breathing CBCT scan on a single treatment day...
January 19, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29350559/visualizing-3d-food-microstructure-using-tomographic-methods-advantages-and-disadvantages
#19
Zi Wang, Els Herremans, Siem Janssen, Dennis Cantre, Pieter Verboven, Bart Nicolaï
X-ray micro-computed tomography (micro-CT) provides the unique ability to capture intact internal microstructure data without significant preparation of the sample. The fundamentals of micro-CT technology are briefly described along with a short introduction to basic image processing, quantitative analysis, and derivative computational modeling. The applications and limitations of micro-CT in industries such as meat, dairy, postharvest, and bread/confectionary are discussed to serve as a guideline to the plausibility of utilizing the technique for detecting features of interest...
January 18, 2018: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/29350539/effectiveness-and-safety-of-ct-guided-percutaneous-radiofrequency-ablation-of-adrenal-metastases
#20
Kang Zhou, Jie Pan, Ning Yang, Hai-Feng Shi, Jian Cao, Yu-Mei Li, Hong-Zhi Zhang, Ke-Fei Wang, Shao-Hui Chen
OBJECTIVE: The imaging-guided percutaneous radiofrequency (RF) ablation of adrenal metastases is a relatively new treatment procedure, compared to the more widespread application of the technique for the treatment of liver and renal cancers, the present study aims to evaluate the safety and efficacy of the computed tomography (CT)-guided percutaneous radiofrequency ablation of adrenal metastases in a cohort of patients. METHODS: Thirty-three patients with 38 adrenal metastases who received percutaneous CT-guided radiofrequency ablation between 2012 to 2015 were retrospectively reviewed...
January 19, 2018: British Journal of Radiology
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