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https://www.readbyqxmd.com/read/29782597/low-dose-radiation-18f-fluoride-pet-ct-in-the-assessment-of-unilateral-condylar-hyperplasia-of-the-mandible-preliminary-results-of-a-single-centre-experience
#1
G M Lima, S Diodato, E Costabile, G Cicoria, S Civollani, C Marchetti, P L Guidalotti, C Pettinato, C Nanni, S Fanti
Background: Unilateral condylar hyperplasia (UCH) of the mandible, or Hypercondylia, is a pathological condition that determines an abnormal growth of the affected condyle.Bone SPECT with Tc99m-diphosphonates is a successful tool in the diagnosis of UCH. EANM guidelines also suggest the use of 18F-NaF PET/CT, though it leads to a higher radiation exposure. Aim: As UCH patients are young, we aimed to develop a low dose 18F-Fluoride PET/CT protocol and compare it to a standard injected activity scan, to assess if the image quality remains unchanged...
2018: Eur J Hybrid Imaging
https://www.readbyqxmd.com/read/29781766/significant-suppression-of-ct-radiation-induced-dna-damage-in-normal-human-cells-by-the-prc-210-radioprotector
#2
Frank Jermusek, Chelsea Benedict, Emma Dreischmeier, Michael Brand, Michael Uder, Justin J Jeffery, Frank N Ranallo, William E Fahl
While computed tomography (CT) is now commonly used and considered to be clinically valuable, significant DNA double-strand breaks (γ-H2AX foci) in white blood cells from adult and pediatric CT patients have been frequently reported. In this study to determine whether γ-H2AX foci and X-ray-induced naked DNA damage are suppressed by administration of the PrC-210 radioprotector, human blood samples were irradiated in a CT scanner at 50-150 mGy with or without PrC-210, and γ-H2AX foci were scored. X-ray-induced naked DNA damage was also studied, and the DNA protective efficacy of PrC-210 was compared against 12 other common "antioxidants...
May 21, 2018: Radiation Research
https://www.readbyqxmd.com/read/29780632/management-pathways-for-solitary-pulmonary-nodules
#3
REVIEW
Masaoki Ito, Yoshihiro Miyata, Morihito Okada
Pulmonary nodules are often detected during the clinical course of several diseases or through routine screening. Various guidelines have proposed management algorithms for suspicious solitary nodules in lung cancer. Generally, solitary pulmonary nodules are managed according to nodule appearance and risk of lung cancer using low-dose, thin section computed tomography (CT). Liquid biopsy is promising for diagnosis, therapeutic-monitoring and follow-up in lung cancer; however, diagnosis and management pathways based on genetic examination alone have not been established...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29779936/early-response-assessment-on-mid-treatment-computed-tomography-predicts-for-locoregional-recurrence-in-oropharyngeal-cancer-patients-treated-with-definitive-radiation-therapy
#4
Rafi Kabarriti, N Patrik Brodin, George Lundgren, Nitin Ohri, Wolfgang A Tomé, Shalom Kalnicki, Madhur K Garg
PURPOSE: To evaluate whether a response assessment using mid-treatment computed tomography (CT) scans during definitive radiation therapy (RT) for oropharyngeal head and neck cancer can predict for locoregional recurrence (LRR). METHODS AND MATERIALS: Head and neck cancer patients who receive RT at our institution undergo CT repeat scans at the 15th fraction, with treatment replanning in the case of an inadequate dose to gross disease or an increased dose to organs at risk...
April 6, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29779857/factors-affecting-the-incidence-of-contrast-induced-nephropathy-in-patients-undergoing-computed-tomography
#5
M Heras Benito, M Garrido Blázquez, Y Gómez Sanz, M Bernardez Mardomingo, J Ruiz Cacho, F J Rodríguez Recio, M J Fernández-Reyes Luis
OBJECTIVE: To analyze the incidence of contrast-induced nephropathy in a cohort of patients undergoing computed tomography (CT) with intravenous iodinated contrast material. To evaluate the efficacy of N-acetylcysteine in preventing contrast-induced nephropathy. PATIENTS AND METHODS: This prospective observational study was carried out in the months comprising March 2016 through July 2016. We selected the first five patients scheduled to undergo CT examination each day who agreed to participate and signed the informed consent form...
May 17, 2018: Radiología
https://www.readbyqxmd.com/read/29778033/weight-and-the-vitamin-k-expoxide-reductase-1-genotype-primarily-contribute-to-the-warfarin-dosing-in-pediatric-patients-with-kawasaki-disease
#6
Zhouping Wang, Li Zhang, Ping Huang, Xiaoqiong Gu, Xiaofei Xie, Yanfei Wang, Wei Li, Qiyi Zeng
INTRODUCTION: Warfarin therapy is recommended in children with giant coronary artery aneurysms (GCAAs) after Kawasaki disease (KD). Large individual variability makes it difficult to predict the warfarin dose. Polymorphisms in the vitamin K expoxide reductase 1 (VKORC1) and cytochrome P4502C9 (CYP2C9) genes have been reported to influence the warfarin dose. We investigated the effects of the VKORC1 and CYP2C9 genotypes on the warfarin dose in pediatric patients with giant CAAs after KD...
May 8, 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29777016/clinical-utility-of-electronic-alberta-stroke-program-early-computed-tomography-score-software-in-the-enchanted-trial-database
#7
Simon Nagel, Xia Wang, Cheryl Carcel, Thompson Robinson, Richard I Lindley, John Chalmers, Craig S Anderson
BACKGROUND AND PURPOSE: Clinical utility of electronic Alberta Stroke Program Early CT Score (e-ASPECTS), an automated system for quantifying signs of infarction, was evaluated in a large database of thrombolyzed patients with acute ischemic stroke. METHODS: All baseline noncontrast computed tomographic scans of patients with anterior circulation acute ischemic stroke who participated in the alteplase dose arm of the randomized controlled trial ENCHANTED (Enhanced Control of Hypertension and Thrombolysis Stroke Study) were reviewed; poor quality and large (>6 mm) slice thickness were excluded...
May 18, 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29776851/treatment-planning-dose-accuracy-improvement-in-the-presence-of-dental-implants
#8
Holly M Parenica, John R Ford, Panayiotis Mavroidis, Ying Li, Nikos Papanikolaou, Sotirios Stathakis
Streaking artifacts in computed tomography (CT) scans caused by metallic dental implants (MDIs) can lead to inaccuracies in dose calculations. This study quantifies and compares the effect of MDIs on dose distributions using the collapsed cone convolution superposition (CCCS) and Monte Carlo (MC) algorithms, with and without correcting for the density of the MDIs. Ion chamber measurements were taken to test the ability of the algorithms in Pinnacle3 and Monaco to calculate dose near high-Z materials. Nine previously treated patients with head and neck cancer were included in this study...
May 15, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29776658/ustekinumab-for-refractory-giant-cell-arteritis-a-prospective-52-week-trial
#9
Richard Conway, Lorraine O'Neill, Phil Gallagher, Geraldine M McCarthy, Conor C Murphy, Douglas J Veale, Ursula Fearon, Eamonn S Molloy
OBJECTIVES: Giant cell arteritis (GCA) is the most common form of systemic vasculitis. Glucocorticoids are an effective treatment but have significant adverse events and relapses are common. Interleukins 12 (IL-12) and 23 (IL-23) stimulate TH 1 and TH 17 responses and are implicated in the pathogenesis of GCA. The aim of this study was to evaluate the efficacy and safety of IL-12/23 blockade with ustekinumab in GCA. METHODS: We performed a prospective open label study of ustekinumab in patients with refractory GCA...
April 22, 2018: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/29776386/impact-of-vkorc1-cyp4f2-and-nqo1-gene-variants-on-warfarin-dose-requirement-in-han-chinese-patients-with-catheter-ablation-for-atrial-fibrillation
#10
Jiao Li, Wenlong Yang, Zhonghui Xie, Kun Yu, Yuhua Chen, Kaijun Cui
BACKGROUND: The anticoagulation of atrial fibrillation catheter ablation during the perioperative stage does matter and should be treated with discretion. We aimed to assess impact of three important genes participating in vitamin K cycle (i.e. VKORC1 rs9923231, CYP4F2 rs2108622 and NQO1 rs1800566) on the daily stable warfarin dose requirement in Sichuan Han Chinese patients with catheter ablation of atrial fibrillation. METHODS: A total of 222 atrial fibrillation patients taking stable warfarin therapy after catheter ablation operation were enrolled in this study...
May 18, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29775919/effectiveness-of-a-flow-based-device-using-riboflavin-photochemistry-in-damaging-blood-borne-viral-nucleic-acids
#11
Liguo Zhu, Hongli Tong, Shufang Wang, Yang Yu, Zhong Liu, Changqing Li, Deqing Wang
BACKGROUND: Effectiveness of a flow-based treatment device using riboflavin photochemistry was demonstrated by cytopathic effect method using indicator viruses. However, inactivation efficacy against real blood-borne viruses needs to be evaluated, especially at nucleic acid level. MATERIAL AND METHODS: Special plasma samples with varying concentrations of blood-borne virus were selected using a strict blood selection procedure and were treated with device treatment (DT)...
May 3, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29774460/multi-layer-cube-sampling-for-liver-boundary-detection-in-pet-ct-images
#12
Xinxin Liu, Jian Yang, Shuang Song, Hong Song, Danni Ai, Jianjun Zhu, Yurong Jiang, Yongtian Wang
Liver metabolic information is considered as a crucial diagnostic marker for the diagnosis of fever of unknown origin, and liver recognition is the basis of automatic diagnosis of metabolic information extraction. However, the poor quality of PET and CT images is a challenge for information extraction and target recognition in PET-CT images. The existing detection method cannot meet the requirement of liver recognition in PET-CT images, which is the key problem in the big data analysis of PET-CT images. A novel texture feature descriptor called multi-layer cube sampling (MLCS) is developed for liver boundary detection in low-dose CT and PET images...
May 17, 2018: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/29774104/use-of-baseline-18f-fdg-pet-scan-to-identify-initial-sub-volumes-with-local-failure-after-concomitant-radio-chemotherapy-in-head-and-neck-cancer
#13
Floriane Legot, Florent Tixier, Minea Hadzic, Thomas Pinto-Leite, Christelle Gallais, Rémy Perdrisot, Xavier Dufour, Catherine Cheze-Le-Rest
Introduction: Head and neck squamous cell carcinoma (HNSCC) treated by radio-chemotherapy have a significant local recurrence rate. It has been previously suggested that 18F-FDG PET could identify the high uptake areas that can be potential targets for dose boosting. The purpose of this study was to compare the location of initial hypermetabolic regions on baseline scans with the metabolic relapse sites after radio-chemotherapy in HNSCC. Results: The initial functional tumor volume was significantly higher for patients with proven local recurrence or residual disease (23...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773602/clofarabine-high-dose-cytarabine-and-liposomal-daunorubicin-in-pediatric-relapsed-refractory-acute-myeloid-leukemia-a-phase-ib-study
#14
Natasha K A van Eijkelenburg, Mareike Rasche, Essam Ghazaly, Michael N Dworzak, Thomas Klingebiel, Claudia Rossig, Guy Leverger, Jan Stary, Eveline S J M de Bont, Dana A Chitu, Yves Bertrand, Benoit Brethon, Brigitte Strahm, Inge M van der Sluis, Gertjan J L Kaspers, Dirk Reinhardt, C Michel Zwaan
Survival in children with relapsed/refractory acute myeloid leukemia is unsatisfactory. Treatment consists of one course fludarabine, cytarabine and liposomal daunorubicin, followed by fludarabine and cytarabine and stem-cell transplantation. Study ITCC 020/I-BFM 2009-02 aimed to identify the recommended phase 2 dose of clofarabine replacing fludarabine in the abovementioned combination regimen (3+3 design). Escalating dose-levels of clofarabine (20-40mg/m2/day x5days) and liposomal daunorubicin (40-0mg/m2/day) were administered with cytarabine (2g/m2/day x5days)...
May 17, 2018: Haematologica
https://www.readbyqxmd.com/read/29773331/novel-use-of-viewray-mri-guidance-for-high-dose-rate-brachytherapy-in-the-treatment-of-cervical-cancer
#15
Huaising C Ko, Jessie Y Huang, Jessica R Miller, Rupak K Das, Charles R Wallace, Anna-Maria A De Costa, David M Francis, Margaret R Straub, Bethany M Anderson, Kristin A Bradley
PURPOSE: To characterize image quality and feasibility of using ViewRay MRI (VR)-guided brachytherapy planning for cervical cancer. METHODS AND MATERIALS: Cervical cancer patients receiving intracavitary brachytherapy with tandem and ovoids, planned using 0.35T VR MRI at our institution, were included in this series. The high-risk clinical target volume (HR-CTV), visible gross tumor volume, bladder, sigmoid, bowel, and rectum contours for each fraction of brachytherapy were evaluated for dosimetric parameters...
May 14, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29772077/a-feature-alignment-score-for-online-cone-beam-ct-based-image-guided-radiotherapy-for-prostate-cancer
#16
Catriona Hargrave, Timothy Deegan, Michael Poulsen, Tomasz Bednarz, Fiona Harden, Kerrie Mengersen
PURPOSE: To develop a method for scoring online cone-beam CT (CBCT)-to-planning CT image feature alignment to inform prostate image-guided radiotherapy (IGRT) decision-making. The feasibility of incorporating volume variation metric thresholds, predictive of delivering planned dose into weighted functions, was investigated. METHODS: Radiation therapists and radiation oncologists participated in workshops where they reviewed prostate CBCT-IGRT case examples and completed a paper-based survey of image feature matching practices...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29772061/an-image-guided-radiotherapy-decision-support-framework-incorporating-a-bayesian-network-and-visualization-tool
#17
Catriona Hargrave, Timothy Deegan, Tomasz Bednarz, Michael Poulsen, Fiona Harden, Kerrie Mengersen
PURPOSE: To describe a Bayesian network (BN) and complementary visualization tool, that aim to support decision-making during online cone-beam computed tomography (CBCT)-based image guide radiotherapy (IGRT) for prostate cancer patients. METHODS: The BN was created to represent relationships between observed prostate, proximal seminal vesicle (PSV), bladder and rectum volume variations, an image feature alignment score (FASTV _ OAR ), delivered dose and treatment plan compliance (TPC)...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29772057/a-4d-global-respiratory-motion-model-of-the-thorax-based-on-ct-images-a-proof-of-concept
#18
H Fayad, M Gilles, T Pan, D Visvikis
PURPOSE: Respiratory motion reduces the sensitivity and specificity of medical images especially in the thoracic and abdominal areas. It may affect applications such as cancer diagnostic imaging and/or radiation therapy (RT). Solutions to this issue include modelling of the respiratory motion in order to optimize both diagnostic and therapeutic protocols. Personalised motion modeling required patient specific four dimensional (4D) imaging which in the case of 4D computed tomography (4D CT) acquisition is associated with an increased dose...
May 17, 2018: Medical Physics
https://www.readbyqxmd.com/read/29771683/an-individualized-strategy-to-estimate-the-effect-of-deformable-registration-uncertainty-on-accumulated-dose-in-the-upper-abdomen
#19
Yibing Wang, Steven F Petit, Eliana Vasquez Osorio, Vikas Gupta, Alejandra Méndez Romero, Ben J M Heijmen
In the abdomen, it is challenging to assess the accuracy of deformable image registration (DIR) for individual patients, due to the lack of clear anatomical landmarks, which can hamper clinical applications that require high accuracy DIR, such as adaptive radiotherapy. In this study, we propose and evaluate a methodology for estimating the impact of uncertainties in DIR on calculated accumulated dose in the upper abdomen, in order to aid decision making in adaptive treatment approaches. 
 Sixteen liver metastasis patients treated with SBRT were evaluated...
May 17, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29770769/ct-fluoroscopy-guided-percutaneous-osteoplasty-with-or-without-radiofrequency-ablation-in-the-treatment-of-painful-extraspinal-and-spinal-bone-metastases-technical-outcome-and-complications-in-29-patients
#20
Caroline A Burgard, Julien Dinkel, Frederik Strobl, Philipp M Paprottka, Nicolai Schramm, Maximilian Reiser, Christoph G Trumm
PURPOSE: We aimed to assess the safety and technical outcome of computed tomography (CT) fluoroscopy-guided osteoplasty with or without prior percutaneous radiofrequency ablation (RFA) in patients with painful osteolyses. METHODS: We performed a retrospective analysis of 29 patients with painful extraspinal and spinal osteolyses (16 women, 13 men; 63.1±14.4 years) who underwent CT fluoroscopy-guided osteoplasty (10-20 mAs tube current) with or without RFA (26 and 14 lesions, respectively), in 33 consecutive procedures from 2002 to 2016...
May 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
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