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Jennifer Shuldiner, Ying Liu, Aisha Lofters
BACKGROUND: Studies have shown that morbidity and mortality rates due to cancer among recent immigrants are lower than those among the native-born population. The objectives of this study were to describe the incidence of colorectal and breast cancer among immigrants from major regions of the world compared to Canadian-born residents of the province of Ontario and to examine the role of length of stay and neighborhood income. METHODS: Retrospective cohort study including all individuals 18 years and over residing in Ontario from 2004 to 2014...
May 8, 2018: BMC Cancer
Patrizio Barca, Marco Giannelli, Maria Evelina Fantacci, Davide Caramella
Computed tomography (CT) is a useful and widely employed imaging technique, which represents the largest source of population exposure to ionizing radiation in industrialized countries. Adaptive Statistical Iterative Reconstruction (ASIR) is an iterative reconstruction algorithm with the potential to allow reduction of radiation exposure while preserving diagnostic information. The aim of this phantom study was to assess the performance of ASIR, in terms of a number of image quality indices, when different reconstruction blending levels are employed...
May 8, 2018: Australasian Physical & Engineering Sciences in Medicine
Xiaohu Li, Hongmin Shu, Yifei Zhang, Xiaoshu Li, Jian Song, Junhua Du, Yinfeng Qian, Bin Liu, Yongqiang Yu
Purpose: To prospectively determine the diagnostic performance of low-dose CT (LDCT) with adaptive statistical iterative reconstruction (ASIR) technique for the detection of urinary stone disease. Results: The average DLP and ED was 408.16 ± 119.04 mGy and 6.12 ± 1.79 mSv in CDCT, and 138.19 ± 76.87 mGy and 2.07 ± 1.15 mSv in LDCT, respectively. The dose reduction rate of LDCT was nearly 66.1% for both DLP and ED ( P < 0.05). LDCT-80% ASIR images showed great image quality (mean score = 4...
April 13, 2018: Oncotarget
Anais Viry, Christoph Aberle, Damien Racine, Jean-François Knebel, Sebastian T Schindera, Sabine Schmidt, Fabio Becce, Francis R Verdun
PURPOSE: To investigate how various generations of iterative reconstruction (IR) algorithms impact low-contrast detectability (LCD) in abdominal computed tomography (CT) for different patient effective diameters, using a quantitative task-based approach. METHODS: Investigations were performed using an anthropomorphic abdominal phantom with two optional additional rings to simulate varying patient effective diameters (25, 30, and 35 cm), and containing multiple spherical targets (5, 6, and 8 mm in diameter) with a 20-HU contrast difference...
April 2018: Physica Medica: PM
Yongxia Zhao, Ziwei Zuo, Shujie Cheng, Yanmin Wu
OBJECTIVE: To investigate the differences in imaging quality and radiation dose in CT pulmonary angiography (CTPA) by organ dose modulation and 3D Smart mA modulation in different body mass indices (BMIs) with an adaptive statistical iterative reconstruction (ASiR-V) algorithm. METHODS: Three hundred female patients who underwent CTPA were equally divided into three groups: A (18.5 kg/m2  ≦ BMI < 24.9 kg/m2 ), B (24.9 kg/m2  ≦ BMI < 29...
May 3, 2018: La Radiologia Medica
Wei Li, Aiyin Li, Bin Wang, Xiuyuan Niu, Xin Cao, Xinyi Wang, Hao Shi
OBJECTIVES: To evaluate the effect of automatic spectral imaging protocol selection (ASIS) and adaptive statistical iterative reconstruction (ASiR) technique in the reduction of radiation and contrast medium dose in typical hepatic hemangioma (HH) dual-energy spectral CT (DEsCT). METHODS: 62 patients with suspected HH were randomly divided into two groups equally: group A, conventional 120-kVp CT with standard iodine load; group B, DEsCT with ASIS technique and reduced iodine load, two sets of monochromatic spectral images were reconstructed: 69keV level with 30% ASiR (group B1 ) and 52keV level with 50%ASiR (group B2 )...
May 1, 2018: British Journal of Radiology
André Euler, Justin Solomon, Daniele Marin, Rendon C Nelson, Ehsan Samei
OBJECTIVE: The purpose of this study was to assess image noise, spatial resolution, lesion detectability, and the dose reduction potential of a proprietary third-generation adaptive statistical iterative reconstruction (ASIR-V) technique. MATERIALS AND METHODS: A phantom representing five different body sizes (12-37 cm) and a contrast-detail phantom containing lesions of five low-contrast levels (5-20 HU) and three sizes (2-6 mm) were deployed. Both phantoms were scanned on a 256-MDCT scanner at six different radiation doses (1...
April 27, 2018: AJR. American Journal of Roentgenology
Steven David Hajdu, Roy Thomas Daniel, Reto Antoine Meuli, Jean-Baptiste Zerlauth, Vincent Dunet
PURPOSE: To subjectively and objectively assess the impact of model-based iterative reconstruction(MBIR) on image quality in cerebral computed tomography angiography compared to adaptive statistical iterative reconstruction (ASIR). METHODS: 107 patients (mean age: 58 ± 14 years) were included prior to (n = 38) and after (n = 69) intracranial aneurysm treatment. Images were acquired using a routine protocol and reconstructed with MBIR and ASIR. Image noise, signal-to-noise (SNR) and contrast-to-noise (CNR) ratios in the internal carotid and middle cerebral arteries were compared between MBIR and ASIR using the Wilcoxon signed-rank test...
May 2018: European Journal of Radiology
Shota Watanabe, Kenta Sakaguchi, Makoto Hosono, Kazunari Ishii, Takamichi Murakami, Katsuhiro Ichikawa
The purpose of this study was to evaluate the effect of a hybrid-type iterative reconstruction method on Z-score mapping of hyperacute stroke in unenhanced computed tomography (CT) images. We used a hybrid-type iterative reconstruction [adaptive statistical iterative reconstruction (ASiR)] implemented in a CT system (Optima CT660 Pro advance, GE Healthcare). With 15 normal brain cases, we reconstructed CT images with a filtered back projection (FBP) and ASiR with a blending factor of 100% (ASiR100%). Two standardized normal brain data were created from normal databases of FBP images (FBP-NDB) and ASiR100% images (ASiR-NDB), and standard deviation (SD) values in basal ganglia were measured...
2018: Nihon Hoshasen Gijutsu Gakkai Zasshi
Kavita Sharma, Asir John Samuel, Divya Midha, Vencita Priyanka Aranha, Kanimozhi Narkeesh, Narkeesh Arumugam
Multi-directional reach test (MRT) emerged as a valid and reliable assessment tool for balance evaluation among elderly. The normative reference scores have been established in adults and elderly people, but they were not yet established for children. Hence, we aimed at establishing the normative reference scores of MRT among the school going children aged between 5 and 12 years. Children (N = 194; 124 males, 70 females) were recruited by the stratified random sampling for the normative study. MRT was performed by the custom made, multi-directional reach estimator...
March 27, 2018: Homo: Internationale Zeitschrift Für die Vergleichende Forschung Am Menschen
Ahmed M Soliman, Neveen S Gadallah, Hathal Mohammed Al Dhafer
The Saudi Arabian species of the genus Macroocula Panfilov (Bradynobaenidae, Apterogyninae) are keyed and illustrated. Eleven species were previously recorded from Arabian fauna: M. andreai Pagliano (♂), M. atuberculata Soliman & Gadallah (♂), M. khorimensis Soliman & Gadallah (♂), M. magna (Invrea) (♀), M. mahunkai (Argaman) (♂), M. nitida (Bischoff) (♂, ♀), M. ohli Pagliano (♂), M. riyadha Gadallah & Pagliano (♂), M. savignyi (Klug) (♂, ♀), M. sinaica (Invrea) (♂) and M...
2018: ZooKeys
Selvaraj Sudhakar, S Veena Kirthika, K Padmanabhan, G Mohan Kumar, C V Senthil Nathan, R Gopika, Asir John Samuel
Objective: To compare the impact of foot arches on dynamic balance and speed performance. Materials and methods: 30 collegiate male short distance runners were divided into three groups based on foot arches, high, neutral and low. Balance and speed performance were estimated based on scores of star excursion balance test (SEBT), 40 yard dash test and vertical jump test (VJT). Results: Significant improved scores (p < 0.001) were noted in SEBT, 40 yard dash test and VJT...
March 2018: Journal of Orthopaedics
Rohit Nair, Sannasi Rajasekar, Allan Abraham, Asir John Samuel
Objective: To determine the awareness and application of the injury prevention strategies by professional Indian football players through Standard Questionnaire Based Survey. Design: Descriptive Epidemiological Study. Setting: Professional football clubs in India. Participants: Among 150 professional footballers playing in India, 109 football players participated.. Procedure: The online questionnaire was made in the Google drive application...
March 2018: Journal of Clinical Orthopaedics and Trauma
Xiao-Ping Yin, Bu-Lang Gao, Cai-Ying Li, Zi-Wei Zuo, Ying-Jin Xu, Jia-Ning Wang, Huai-Jun Liu, Guang-Lu Liang
PURPOSE: To investigate the effect of automatic spectral imaging protocol selection (ASIS) and adaptive statistical iterative reconstruction (ASIR) technology in reducing radiation and contrast dosage. METHODS: Sixty-four patients were randomly divided into two groups for abdominal computed tomography (CT): the experiment group with ASIS plus 50% ASIR and the control with 120 kVp voltage. RESULTS: The CT dose-index volume decreased by 23...
April 3, 2018: Japanese Journal of Radiology
Gianluca Pontone, Giuseppe Muscogiuri, Daniele Andreini, Andrea I Guaricci, Marco Guglielmo, Andrea Baggiano, Fabio Fazzari, Saima Mushtaq, Edoardo Conte, Andrea Annoni, Alberto Formenti, Elisabetta Mancini, Massimo Verdecchia, Alessandro Campari, Chiara Martini, Marco Gatti, Laura Fusini, Lorenzo Bonfanti, Elisa Consiglio, Mark G Rabbat, Antonio L Bartorelli, Mauro Pepi
RATIONALE AND OBJECTIVES: A new postprocessing algorithm named adaptive statistical iterative reconstruction (ASIR)-V has been recently introduced. The aim of this article was to analyze the impact of ASIR-V algorithm on signal, noise, and image quality of coronary computed tomography angiography. MATERIALS AND METHODS: Fifty consecutive patients underwent clinically indicated coronary computed tomography angiography (Revolution CT; GE Healthcare, Milwaukee, WI)...
March 27, 2018: Academic Radiology
Asma'a A Al-Ekrish, Sara A Alfadda, Dania Tamimi, Wafa Alfaleh, Romed Hörmann, Wolfgang Puelacher, Gerlig Widmann
PURPOSE: To investigate whether ultra-low-dose multidetector computed tomography (MDCT) combined with the reconstruction techniques filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASIR), or model-based iterative reconstruction (MBIR) alters the subjective classification of revised Lekholm and Zarb (LZ) bone types at prospective dental implant sites. MATERIALS AND METHODS: Three cadavers underwent a reference MDCT examination using a standard dose volume (CT dose index [CTDIvol ]: 29...
March 28, 2018: International Journal of Prosthodontics
Caroline E Boeke, Vennie Nabitaka, Andrea Rowan, Katherine Guerra, Arnold Kabbale, Barbara Asire, Eleanor Magongo, Pamela Nawaggi, Vivienne Mulema, Betty Mirembe, Victor Bigira, Andrew Musoke, Cordelia Katureebe
BACKGROUND: While antiretroviral therapy (ART) availability for HIV patients has increased dramatically in Uganda, patient linkage to and retention in care remains a challenge. We assessed patterns of engagement in care in 20 Ugandan health facilities with low retention based on national reporting. METHODS: We assessed patient linkage to care (defined as registering for pre-ART or ART care at the facility within 1 month of HIV diagnosis) and 6-month retention in care (having a visit 3-6 months after ART initiation) and associations with patient-/facility-level factors using multivariate logistic regression...
March 23, 2018: BMC Infectious Diseases
Cui Feng, Di Zhu, Xianlun Zou, Anqin Li, Xuemei Hu, Zhen Li, Daoyu Hu
To investigate the subjective and quantitative image quality and radiation exposure of CT enterography (CTE) examination performed at low tube voltage and low concentration of contrast agent with adaptive statistical iterative reconstruction (ASIR) algorithm, compared with conventional CTE.One hundred thirty-seven patients with suspected or proved gastrointestinal diseases underwent contrast enhanced CTE in a multidetector computed tomography (MDCT) scanner. All cases were assigned to 2 groups. Group A (n = 79) underwent CT with low tube voltage based on patient body mass index (BMI) (BMI < 23 kg/m, 80 kVp; BMI ≥ 23 kg/m, 100 kVp) and low concentration of contrast agent (270 mg I/mL), the images were reconstructed with standard filtered back projection (FBP) algorithm and 50% ASIR algorithm...
March 2018: Medicine (Baltimore)
Lin Xie, Jay Onysko, Howard Morrison
INTRODUCTION: Surveillance of childhood cancer incidence trends can inform etiologic research, policy and programs. This study presents the first population-based report on demographic and geographic variations in incidence trends of detailed pediatric diagnostic groups in Canada. METHODS: The Canadian Cancer Registry data were used to calculate annual age-standardized incidence rates (ASIRs) from 1992 to 2010 among children less than 15 years of age by sex, age and region for the 12 main diagnostic groups and selected subgroups of the International Classification of Childhood Cancer (ICCC), 3rd edition...
March 2018: Health Promotion and Chronic Disease Prevention in Canada
Y R Chai, J J Xing, J B Gao, P J Lü, P Hou, J Liu
Objective: To analyze the effect of preset adaptive statistical iterative reconstruction-V (ASIR-V) on image quality and radiation dose in dual-enhanced abdominal CT and to investigate the optimal ASIR-V in clinic use. Methods: From February 13 to April 30 in 2017, one hundred and eighty patients who received up abdominal CT scan in the First Affiliated Hospital of Zhengzhou University were collected prospectively. All patients underwent arterial phase (AP) and portal venous phase (PVP) enhanced abdominal CT(120 kVp, noise index 10) and were randomly divided into 6 groups according to random number table (A-F, 30 cases in each group)...
March 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
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