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https://www.readbyqxmd.com/read/28330192/differential-display-reverse-transcription-pcr-ddrt-pcr-a-new-technology-for-molecular-detection-and-studying-one-of-the-antagonistic-factors-of-bacillus-endophyticus-strain-sa-against-staphylococcus-aureus-mrsa
#1
Mahmoud F Moustafa, Tarek H Taha, M Helal, Sulaiman A Alrumman
Differential Display (DDRT-PCR) is a powerful technique for analyzing differences in gene expression. In-vivo expression technologies and differential display RT-PCR are providing new approaches to further examine a microbe's response to experimental conditions which more closely resemble natural microbial associations and habitats. In this study, Bacillus endophyticus strain SA isolated from the inner tissue of the stem of the cultivated plant (Salvadora persica, Asir, Kingdom of Saudi Arabia) produces an antagonistic factor...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28302073/image-quality-improvement-using-model-based-iterative-reconstruction-in-low-dose-chest-ct-for-children-with-necrotizing-pneumonia
#2
Jihang Sun, Tong Yu, Jinrong Liu, Xiaomin Duan, Di Hu, Yong Liu, Yun Peng
BACKGROUND: Model-based iterative reconstruction (MBIR) is a promising reconstruction method which could improve CT image quality with low radiation dose. The purpose of this study was to demonstrate the advantage of using MBIR for noise reduction and image quality improvement in low dose chest CT for children with necrotizing pneumonia, over the adaptive statistical iterative reconstruction (ASIR) and conventional filtered back-projection (FBP) technique. METHODS: Twenty-six children with necrotizing pneumonia (aged 2 months to 11 years) who underwent standard of care low dose CT scans were included...
March 16, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28297460/a-noise-power-spectrum-study-of-a-new-model-based-iterative-reconstruction-system-veo-3-0
#3
Guang Li, Xinming Liu, Cristina T Dodge, Corey T Jensen, X John Rong
The purpose of this study was to evaluate performance of the third generation of model-based iterative reconstruction (MBIR) system, Veo 3.0, based on noise power spectrum (NPS) analysis with various clinical presets over a wide range of clinically applicable dose levels. A CatPhan 600 surrounded by an oval, fat-equivalent ring to mimic patient size/shape was scanned 10 times at each of six dose levels on a GE HD 750 scanner. NPS analysis was performed on images reconstructed with various Veo 3.0 preset combinations for comparisons of those images reconstructed using Veo 2...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297318/a-qualitative-and-quantitative-analysis-of-radiation-dose-and-image-quality-of-computed-tomography-images-using-adaptive-statistical-iterative-reconstruction
#4
Fahad Ahmed Hussain, Noor Mail, Abdulrahman M Shamy, Suliman Alghamdi, Abdelhamid Saoudi
Image quality is a key issue in radiology, particularly in a clinical setting where it is important to achieve accurate diagnoses while minimizing radiation dose. Some computed tomography (CT) manufacturers have introduced algorithms that claim significant dose reduction. In this study, we assessed CT image quality produced by two reconstruction algorithms provided with GE Healthcare's Discovery 690 Elite positron emission tomography (PET) CT scanner. Image quality was measured for images obtained at various doses with both conventional filtered back-projection (FBP) and adaptive statistical iterative reconstruction (ASIR) algorithms...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28290345/first-experiences-with-model-based-iterative-reconstructions-influence-on-quantitative-plaque-volume-and-intensity-measurements-in-coronary-computed-tomography-angiography
#5
H Precht, P H Kitslaar, A Broersen, O Gerke, J Dijkstra, J Thygesen, K Egstrup, J Lambrechtsen
PURPOSE: Investigate the influence of adaptive statistical iterative reconstruction (ASIR) and the model-based IR (Veo) reconstruction algorithm in coronary computed tomography angiography (CCTA) images on quantitative measurements in coronary arteries for plaque volumes and intensities. METHODS: Three patients had three independent dose reduced CCTA performed and reconstructed with 30% ASIR (CTDIvol at 6.7 mGy), 60% ASIR (CTDIvol 4.3 mGy) and Veo (CTDIvol at 1...
February 2017: Radiography
https://www.readbyqxmd.com/read/28289943/intra-patient-comparison-of-reduced-dose-model-based-iterative-reconstruction-with-standard-dose-adaptive-statistical-iterative-reconstruction-in-the-ct-diagnosis-and-follow-up-of-urolithiasis
#6
Sean Tenant, Chun Lap Pang, Prageeth Dissanayake, Varut Vardhanabhuti, Colin Stuckey, Catherine Gutteridge, Christopher Hyde, Carl Roobottom
OBJECTIVES: To evaluate the accuracy of reduced-dose CT scans reconstructed using a new generation of model-based iterative reconstruction (MBIR) in the imaging of urinary tract stone disease, compared with a standard-dose CT using 30% adaptive statistical iterative reconstruction. METHODS: This single-institution prospective study recruited 125 patients presenting either with acute renal colic or for follow-up of known urinary tract stones. They underwent two immediately consecutive scans, one at standard dose settings and one at the lowest dose (highest noise index) the scanner would allow...
March 13, 2017: European Radiology
https://www.readbyqxmd.com/read/28289906/pediatric-chest-ct-at-chest-radiograph-doses-when-is-the-ultralow-dose-chest-ct-clinically-appropriate
#7
Javier E Villanueva-Meyer, David M Naeger, Jesse L Courtier, Michael D Hope, Jack W Lambert, John D MacKenzie, Andrew S Phelps
PURPOSE: Computed tomography (CT) use in emergency departments represents a significant contribution to pediatric patients' exposure to ionizing radiation. Here, we evaluate whether ultralow-dose chest CT can be diagnostically adequate for other diagnoses and whether model-based iterative reconstruction (MBIR) can improve diagnostic adequacy compared to adaptive statistical iterative reconstruction (ASIR) at ultralow doses. METHODS: Twenty children underwent chest CTs: 10 standard-dose reconstructed with ASIR and 10 ultralow-dose reconstructed with ASIR and MBIR...
March 14, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28267987/prospective-ecg-triggering-cardiac-ct-for-infants-with-complex-congenital-heart-disease-using-low-dose-contrast-medium-low-tube-voltage-and-adaptive-statistical-iterative-reconstruction
#8
S-Y Wang, W Gao, Y-M Zhong, A-M Sun, Q Wang, L-W Hu, H-S Qiu, J-Y Li
AIM: To demonstrate the clinical value of prospective electrocardiography (ECG)-triggered cardiac computed tomography (CT) with low concentration contrast medium, low tube voltage, and adaptive statistic iterative reconstruction (ASIR) to reduce both radiation and contrast dose in examining infants with complex congenital heart disease (CHD). MATERIALS AND METHODS: Forty-four consecutive infants (19 male, 25 female, age: 8.06±4.33 months, weight: 7.31±1.36 kg) with complex CHD underwent prospective ECG-triggered low-dose cardiac CT using 80 kVp and 120 mA...
March 4, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28267529/optimal-ct-scanning-parameters-for-commonly-used-tumor-ablation-applicators
#9
REVIEW
Adam E M Eltorai, Grayson L Baird, Nicholas Monu, Farrah Wolf, Michael Seidler, Scott Collins, Jeomsoon Kim, Damian E Dupuy
PURPOSE: CT-beam hardening artifact can make tumor margin visualization and its relationship to the ablation applicator tip challenging. To determine optimal scanning parameters for commonly-used applicators. MATERIALS AND METHODS: Applicators were placed in ex-vivo cow livers with implanted mock tumors, surrounded by bolus gel. Various CT scans were performed at 440mA with 5mm thickness changing kVp, scan time, ASiR, scan type, pitch, and reconstruction algorithm...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28264344/a-review-of-subtribe-cymindidina-laporte-1834-coleoptera-carabidae-lebiini-in-southwestern-saudi-arabia-with-descriptions-of-two-new-species
#10
Iftekhar Rasool, Ron F F L Felix, Mahmoud S Abdel-Dayem, Hathal M Aldhafer
The carabid subtribe Cymindidina Laporte, 1834 is reviewed for the southwestern Saudi Arabia. Five species belonging to two genera (Afrotarus Jeannel, 1949 and Cymindis Latreille, 1806) are studied, including two species described as new: A. fadli sp. n. from Baha Province and A. soudaensis sp. n. from Asir Province. A key to genera and species of Saudi Arabia is given.
February 21, 2017: Zootaxa
https://www.readbyqxmd.com/read/28255903/reduction-of-metal-artifacts-due-to-dental-hardware-in-computed-tomography-angiography-assessment-of-the-utility-of-model-based-iterative-reconstruction
#11
Keita Kuya, Yuki Shinohara, Ayumi Kato, Makoto Sakamoto, Masamichi Kurosaki, Toshihide Ogawa
PURPOSE: The aim of this study is to assess the value of adaptive statistical iterative reconstruction (ASIR) and model-based iterative reconstruction (MBIR) for reduction of metal artifacts due to dental hardware in carotid CT angiography (CTA). METHODS: Thirty-seven patients with dental hardware who underwent carotid CTA were included. CTA was performed with a GE Discovery CT750 HD scanner and reconstructed with filtered back projection (FBP), ASIR, and MBIR. We measured the standard deviation at the cervical segment of the internal carotid artery that was affected most by dental metal artifacts (SD1) and the standard deviation at the common carotid artery that was not affected by the artifact (SD2)...
March 2, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28197873/ct-angiography-of-the-kidney-using-routine-ct-and-the-latest-gemstone-spectral-imaging-combination-of-different-noise-indexes-image-quality-and-radiation-dose
#12
Yongxia Zhao, Yanmin Wu, Ziwei Zuo, Shujie Cheng
OBJECTIVE: The objective of our study was to compare the image quality and radiation dose of computed tomography angiography (CTA) of the kidney in patients with different body mass indexes using routine CT and the latest Gemstone Spectral Imaging (GSI) combination of different noise indexes (NI) with the adaptive statistical iterative reconstruction 2.0 algorithm (ASiR 2.0). METHODS: A total of 120 patients who had undergone a CTA of the kidney were divided into four groups (A, B, C and D), with 30 patients in each group...
February 15, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28177655/iterative-image-reconstruction-improves-the-accuracy-of-automated-plaque-burden-assessment-in-coronary-ct-angiography-a-comparison-with-intravascular-ultrasound
#13
Stefan B Puchner, Maros Ferencik, Akiko Maehara, Paul Stolzmann, Shixin Ma, Synho Do, Hans-Ulrich Kauczor, Gary S Mintz, Udo Hoffmann, Christopher L Schlett
OBJECTIVE: The purpose of this study was to determine whether use of iterative image reconstruction algorithms improves the accuracy of coronary CT angiography (CCTA) compared with intravascular ultrasound (IVUS) in semiautomated plaque burden assessment. MATERIALS AND METHODS: CCTA and IVUS images of seven coronary arteries were acquired ex vivo. CT images were reconstructed with filtered back projection (FBP) and adaptive statistical (ASIR) and model-based (MBIR) iterative reconstruction algorithms...
April 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28149087/motor-cognitive-processing-speed-estimation-among-the-primary-schoolchildren-by-deriving-prediction-formula-a-cross-sectional-study
#14
Vencita Priyanka Aranha, Monika Moitra, Shikha Saxena, Kanimozhi Narkeesh, Narkeesh Arumugam, Asir John Samuel
OBJECTIVES: Motor cognitive processing speed (MCPS) is often reported in terms of reaction time. In spite of being a significant indicator of function, behavior, and performance, MCPS is rarely used in clinics and schools to identify kids with slowed motor cognitive processing. The reason behind this is the lack of availability of convenient formula to estimate MCPS. Thereby, the aim of this study is to estimate the MCPS in the primary schoolchildren. MATERIALS AND METHODS: Two hundred and four primary schoolchildren, aged 6-12 years, were recruited by the cluster sampling method for this cross-sectional study...
January 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28116512/head-ct-image-quality-improvement-with-asir-v-using-a-reduced-radiation-dose-protocol-for-children
#15
Hyun Gi Kim, Ho-Joon Lee, Seung-Koo Lee, Hyun Ji Kim, Myung-Joon Kim
OBJECTIVE: To investigate the quality of images reconstructed with adaptive statistical iterative reconstruction V (ASIR-V), using pediatric head CT protocols. METHODS: A phantom was scanned at decreasing 20% mA intervals using our standard pediatric head CT protocols. Each study was then reconstructed at 10% ASIR-V intervals. After the phantom study, we reduced mA by 10% in the protocol for <3-year-old patients and applied 30% ASIR-V and by 30% in the protocol for 3- to 15-year-old patients and applied 40% ASIR-V...
January 23, 2017: European Radiology
https://www.readbyqxmd.com/read/28099224/comparison-of-model-based-iterative-reconstruction-adaptive-statistical-iterative-reconstruction-and-filtered-back-projection-for-detecting-hepatic-metastases-on-submillisievert-low-dose-computed-tomography
#16
Jung Hee Son, Seung Ho Kim, Jung-Hee Yoon, Yedaun Lee, Yun-Jung Lim, Seon-Jeong Kim
OBJECTIVE: The aim of the study was to compare the diagnostic performance of model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP) on submillisievert low-dose computed tomography (LDCT) for detecting hepatic metastases. METHODS: Thirty-eight patients having hepatic metastases underwent abdomen CT. Computed tomography protocol consisted of routine standard-dose portal venous phase scan (120 kVp) and 90-second delayed low-dose scan (80 kVp)...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28077736/atypical-presentation-of-majocchi-s-granuloma-in-an-immunocompetent-host
#17
Nisha V Parmar, G Johny Asir, Shivaprakash M Rudramurthy
No abstract text is available yet for this article.
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28059562/spatial-and-contrast-resolution-of-ultralow-dose-dentomaxillofacial-ct-imaging-using-iterative-reconstruction-technology
#18
Gerlig Widmann, Alexander Bischel, Andreas Stratis, Hilde Bosmans, Reinhilde Jacobs, Eva-Maria Gassner, Wolfgang Puelacher, Ruben Pauwels
OBJECTIVES: The objective of this study was to determine how iterative reconstruction technology (IRT) influences contrast and spatial resolution in ultralow-dose dentomaxillofacial CT imaging. METHODS: A polymethyl methacrylate phantom with various inserts was scanned using a reference protocol (RP) at CT dose index volume 36.56 mGy, a sinus protocol at 18.28 mGy and ultralow-dose protocols (LD) at 4.17 mGy, 2.36 mGy, 0.99 mGy and 0.53 mGy. All data sets were reconstructed using filtered back projection (FBP) and the following IRTs: adaptive statistical iterative reconstructions (ASIRs) (ASIR-50, ASIR-100) and model-based iterative reconstruction (MBIR)...
February 17, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28055250/assessment-of-chest-ct-at-ctdivol-less-than-1-mgy-with-iterative-reconstruction-techniques
#19
Atul Padole, Subba Digumarthy, Efren Flores, Rachna Madan, Shelly Mishra, Amita Sharma, Mannudeep K Kalra
OBJECTIVES: To assess the image quality of chest CT reconstructed with image-based (SafeCT), adaptive statistical (ASIR), and model based (MBIR) iterative reconstruction techniques (IRTs) at CTDIvol less than 1 mGy. METHODS: In an IRB approved study, 25 patients gave written informed consent for acquisition of three Reduced Dose (RD) (0.25, 0.4, 0.8 mGy) chest CT after standard of care CT (8 mGy) on a 64-channel multi-detector CT (MDCT) and reconstructed with SafeCT, ASIR, and MBIR...
January 5, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28053841/epidemiology-and-inequality-in-the-incidence-and%C3%A2-mortality-of-nasopharynx-cancer-in-asia
#20
Neda Mahdavifar, Mahshid Ghoncheh, Abdollah Mohammadian-Hafshejani, Bahman Khosravi, Hamid Salehiniya
OBJECTIVES: One of the most common head and neck cancers is nasopharynx cancer. Knowledge about the incidence and mortality of this disease and its distribution in terms of geographical areas is necessary for further study and better planning. Therefore, this study was conducted with the aim of determining the incidence and mortality rates of nasopharynx cancer and its relationship with the Human Development Index (HDI) in Asia in 2012. METHODS: The aim of this ecologic study was to assess the correlation between age-specific incidence rate (ASIR) and age-specific mortality rate (ASMR) with HDI and its components, which include the following: life expectancy at birth, mean years of schooling, and gross national income per capita...
December 2016: Osong Public Health and Research Perspectives
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