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https://www.readbyqxmd.com/read/28448831/computer-simulations-analysis-for-determining-the-polarity-of-charge-generated-by-high-energy-electron-irradiation-of-a-thin-film
#1
Marek Malac, Simon Hettler, Misa Hayashida, Masahiro Kawasaki, Yuji Konyuba, Yoshi Okura, Hirofumi Iijima, Isamu Ishikawa, Marco Beleggia
Detailed simulations are necessary to correctly interpret the charge polarity of electron beam irradiated thin film patch. Relying on systematic simulations we provide guidelines and movies to interpret experimentally the polarity of the charged area, to be understood as the sign of the electrostatic potential developed under the beam with reference to a ground electrode. We discuss the two methods most frequently used to assess charge polarity: Fresnel imaging of the irradiated area and Thon rings analysis...
April 3, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28446943/the-updated-nice-guidelines-cardiac-ct-as-the-first-line-test-for-coronary-artery-disease
#2
REVIEW
Alastair J Moss, Michelle C Williams, David E Newby, Edward D Nicol
PURPOSE OF REVIEW: Cost-effective care pathways are integral to delivering sustainable healthcare programmes. Due to the overestimation of coronary artery disease using traditional risk tables, non-invasive testing has been utilised to improve risk stratification and initiate appropriate management to reduce the dependence on invasive investigations. In line with recent technological improvements, cardiac CT is a modality that offers a detailed anatomical assessment of coronary artery disease comparable to invasive coronary angiography...
2017: Current Cardiovascular Imaging Reports
https://www.readbyqxmd.com/read/28446550/national-institute-for-health-and-care-excellence-updates-the-stable-chest-pain-guideline-with-radical-changes-to-the-diagnostic-paradigm
#3
REVIEW
Adam Timmis, Carl A Roobottom
In the 2016 update of the stable chest pain guideline, the National Institute for Health and Care Excellence (NICE) has made radical changes to the diagnostic paradigm that it-like other international guidelines-had previously placed at the centre of its recommendations. No longer are quantitative assessments of the disease probability considered necessary to determine the need for diagnostic testing and the choice of test. Instead, the recommendation is for no diagnostic testing if chest pain is judged to be 'non-anginal' and CT coronary angiography (CTCA) in patients with 'typical' or 'atypical' chest pain with additional perfusion imaging only if there is uncertainty about the functional significance of coronary lesions...
April 26, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28446039/intraductal-papillary-mucinous-neoplasm-of-the-pancreas-epidemiology-risk-factors-diagnosis-and-management
#4
Linus Aronsson, Roland Andersson, Daniel Ansari
Intraductal papillary mucinous neoplasm (IPMN) is one of the most common cystic neoplasms of the pancreas. It is a heterogeneous disease and can be divided into ductal types and morphological subtypes. The incidence of IPMN is increasing, likely due to the widespread use of cross-sectional imaging and a growing elderly population. IPMN poses an increasing demand on the health care system. Current guidelines provide indications for surgery and recommendations for surveillance, but management of IPMN is still challenging in routine clinical practice...
April 27, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28444414/-general-diagnostic-work-up-for-benign-tumors-of-the-musculoskeletal-system
#5
REVIEW
J Panotopoulos, P Th Funovics, R Windhager
INTRODUCTION: Benign bone tumors are heterogeneous and have different biological behaviors. Treatment requires knowledge of the principle diagnosis and clinical behavior to avoid, on the one hand, overtreatment and, on the other hand, incorrect diagnosis of a potentially malignant tumor. METHODS: Bone tumors of stage I (according to Enneking) should be observed clinically and radiologically. For stage II and stage III lesions, a biopsy should be performed, based on the corresponding oncological guidelines...
April 25, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28443595/evaluation-of-the-diagnostic-role-of-bedside-lung-ultrasonography-in-patients-with-suspected-pulmonary-embolism-in-the-emergency-department
#6
Hüseyin Acar, Serkan Yılmaz, Elif Yaka, Nurettin Özgür Doğan, Asım Enes Özbek, Murat Pekdemir
BACKGROUND: Despite the existence of detailed consensus guidelines, challenges continue to exist regarding efficient, appropriate and safe imaging methods for the diagnosis of suspected pulmonary embolism. AIMS: This study was conducted to investigate the role of wedge sign, B-lines and pleural effusion seen on bedside lung ultrasound in the diagnosis of pulmonary embolism. STUDY DESIGN: Diagnostic accuracy study. METHODS: During the first evaluation of patients with suspected pulmonary embolism, bedside lung ultrasound was performed, and the B-lines, wedge sign, and pleural effusion were investigated...
April 6, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28443147/evaluation-of-lower-urinary-tract-symptoms-in-multiple-sclerosis-patients-review-of-the-literature-and-current-guidelines
#7
REVIEW
Shachar Moshe Aharony, Ornella Lam, Jacques Corcos
Multiple sclerosis (MS) is a unique neurological disease with a broad spectrum of clinical presentations that are time- and disease course-related. MS plaque location (intracranial and/or spinal) is a key feature in the pathophysiology of disease-related lower urinary tract symptoms (LUTS). The prevalence of these symptoms in MS patients is very high, with nearly 90% of them experiencing some degree of voiding dysfunction and/or incontinence. LUTS rarely present as primary MS manifestations and usually appear 6-8 years after the initial diagnosis...
January 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28442514/cd3-and-cd20-immunohistochemical-staining-patterns-of-bone-marrow-infiltrating-malignant-lymphoma-cells
#8
Eun Jin Lee, Miyoung Kim, Han-Sung Kim, Hee Jung Kang, Hyo Jung Kim, Soo Kee Min, Young Kyung Lee
OBJECTIVES: It is known that CD3 and CD20 are homogenously expressed in T lineage and B lineage lymphoma, respectively; however, there are no standard guidelines to interpret immunohistochemistry findings. In this study, we investigated CD3 and CD20 immunohistochemical staining patterns of bone marrow (BM)-infiltrating lymphoma cells. METHODS: Among 297 patients diagnosed with malignant lymphoma, the BM biopsy slides of all 39 cases found to have BM infiltration (T lineage: 11; B lineage: 28) were reviewed...
March 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28442383/the-utility-of-axial-abdominal-imaging-after-partial-nephrectomy-for-t1-renal-cell-carcinoma-surveillance
#9
Igor Sorokin, Noah E Canvasser, Vitaly Margulis, Yair Lotan, Ganesh Raj, Arthur Sagalowsky, Jeffrey C Gahan, Jeffrey A Cadeddu
INTRODUCTION: The overall recurrence rate of T1 renal cell carcinoma is low. We evaluated abdominal imaging after partial nephrectomy based on current guidelines for T1 renal cell carcinoma surveillance. MATERIALS & METHODS: We retrospectively reviewed T1 renal cell carcinoma patients who underwent partial nephrectomy between 2006-2012 followed by abdominal imaging at our institution. Primary and secondary outcomes were incidence and timing of imaging diagnosed abdominal recurrences, respectively...
April 22, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28442120/american-gastroenterological-association-institute-technical-review-on-the-role-of-elastography-in-chronic-liver-diseases
#10
Siddharth Singh, Andrew J Muir, Douglas T Dieterich, Yngve T Falck-Ytter
Chronic liver diseases (CLDs), due to chronic hepatitis C; hepatitis B; nonalcoholic fatty liver diseases (NAFLD); and alcoholic liver disease, are a leading cause of morbidity and mortality globally. Early identification of patients with cirrhosis at high risk of progression to liver-related complications may facilitate timely care and improve outcomes. With risks and misclassification associated with invasive tests, such as liver biopsy, noninvasive imaging modalities for liver fibrosis assessment have gained popularity...
May 2017: Gastroenterology
https://www.readbyqxmd.com/read/28441473/assembly-of-macrocycle-dye-derivatives-into-particles-for-fluorescence-and-photoacoustic-applications
#11
Hoang Dung Lu, Tristan L Lim, Shoshana Javitt, Andrew Heinmiller, Robert K Prud'homme
Optical imaging is a rapidly progressing medical technique that can benefit from the development of new and improved optical imaging agents suitable for use in vivo. However, the molecular rules detailing what optical agents can be processed and encapsulated into in vivo presentable forms are not known. We here present the screening of series of highly hydrophobic porphyrin, phthalocyanine, and naphthalocyanine dye macrocycles through a self-assembling Flash NanoPrecipitation process to form a series of water dispersible dye nanoparticles (NPs)...
April 25, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28441371/multimodal-imaging-of-head-and-neck-squamous-cell-carcinoma
#12
Kenneth L Gage, Kerry Thomas, Daniel Jeong, Dexter G Stallworth, John A Arrington
BACKGROUND: The role of imaging in the staging, treatment planning, and ongoing surveillance of patients with head and neck squamous cell carcinoma (HNSCC) continues to evolve. Changes in patient demographics, treatment paradigms, and technology present opportunities and challenges for the management of HNSCC. METHODS: The general indications and usage of standard and multimodal cross-sectional imaging in the evaluation and management of HNSCC are reviewed, with an emphasis on incorporating them into treatment pathways...
April 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28440126/transcranial-doppler-screening-for-stroke-risk-in-children-with-sickle-cell-disease-a-systematic-review
#13
Sara Mazzucco, Marina Diomedi, Amrana Qureshi, Laura Sainati, Soundrie T Padayachee
Background Sickle cell disease (SCD) is one of the most common causes of stroke in children worldwide. Based on the results of the Stroke Prevention Trial in Sickle Cell Anemia (STOP), annual transcranial Doppler ultrasound (TCD) screening for affected children is standard practice. However, the need for TCD surveillance programs could override the accuracy of the screening, affecting the correct stratification of stroke risk and subsequent clinical management of the target population. Aims To shed light on this issue, a systematic review of the literature on TCD screening for children and adolescents with SCD was carried out (CRD42016050549), according to a list of clinically relevant questions, with a particular focus on screening practices in European countries...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28439953/feasibility-trial-for-primary-stroke-prevention-in-children-with-sickle-cell-anemia-in-nigeria-spin-trial
#14
Najibah Galadanci, Shehu Umar Abdullahi, Leah D Vance, Abdulkadir Musa Tabari, Shehi Ali, Raymond Belonwu, Auwal Salihu, Aisha Amal Galadanci, Binta Wudil Jibir, Halima Bello-Manga, Kathleen Neville, Fenella J Kirkham, Yu Shyr, Sharon Phillips, Brittany V Covert, Adetola A Kassim, Lori C Jordan, Muktar H Aliyu, Michael R DeBaun
The vast majority of children with sickle cell anemia (SCA) live in Africa, where evidence-based guidelines for primary stroke prevention are lacking. In Kano, Nigeria, we conducted a feasibility trial to determine the acceptability of hydroxyurea therapy for primary stroke prevention in children with abnormal transcranial Doppler (TCD) measurements. Children with SCA and abnormal non-imaging TCD measurements (≥ 200 cm/s) received moderate fixed-dose hydroxyurea therapy (∼20 mg/kg/day). A comparison group of children with TCD measurements < 200 cm/s was followed prospectively...
April 25, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28439798/the-changing-landscape-of-genetic-testing-for-inherited-breast-cancer-predisposition
#15
REVIEW
Anosheh Afghahi, Allison W Kurian
The advent of multiple-gene germline panel testing has led to significant advances in hereditary breast and ovarian cancer risk assessment. These include guideline-specific cancer risk management recommendations for patients and their families, such as screening with breast magnetic resonance imaging and risk-reducing surgeries, which have the potential to reduce substantially the morbidity and mortality associated with a hereditary cancer predisposition. However, controversy remains about the clinical validity and actionability of genetic testing in a broader patient population...
May 2017: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/28439616/-high-intensity-focused-ultrasound-hifu-importance-in-the-treatment-of-prostate-cancer
#16
R Ganzer
BACKGROUND: High intensity focused ultrasound (HIFU) has been used since the beginning of the 1990s as an alternative treatment for prostate cancer. OBJECTIVE: Overview of the current status and critical review of the different indications for HIFU in the treatment of prostate cancer. MATERIAL AND METHODS: Review of the current literature on the indications, side effects, oncologic results and current guideline recommendations. RESULTS: The principle of HIFU is based on high energy sound waves, which lead to coagulation necrosis at the focal point...
April 24, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28439612/-imaging-of-the-paranasal-sinuses-and-anterior-skull-base
#17
S Greschus, F Albert, K W G Eichhorn
Due to the complex anatomy of the anterior skull base and paranasal sinuses, radiologic diagnostics in this area are challenging. Magnetic resonance imaging (MRI) and computed tomography (CT) are the primary indicated modalities. Guidelines helping to select the appropriate modality have been published by the German Society of Head and Neck Radiology and the Society of Otorhinolaryngology. The present article presents an overview of the current radiologic procedures and their optimized implementation using clinical examples...
April 21, 2017: HNO
https://www.readbyqxmd.com/read/28439490/watch-and-wait-policy-in-advanced-neuroendocrine-tumors-what-does-it-mean
#18
EDITORIAL
Nicola Fazio
Neuroendocrine neoplasms (NENs) are a group of rare and heterogeneous malignancies, which can develop in various organs. The clinical course of NENs is quite heterogeneous, with different spontaneous growth rates after diagnosis, and different degrees of sensitivity to the same therapy even when they have similar characteristics. Watch and wait (W and W), is a term coined to indicate observation being conducted to assess the evolution of the tumor without administering any anti-tumor therapy. It has been applied to NENs since in extremely rare cases they tend to remain stable for a long time...
April 10, 2017: World Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28439389/management-of-a-viable-cesarean-scar-pregnancy-a-case-report
#19
Mini Mammen Roy, Forough Radfar
The incidence of cesarean scar pregnancy (CSP), which was extremely rare till recent times, has been rising steadily. We have more of such cases being published in medical literature now. A 38-year-old woman with a past history of previous three cesarean sections presented with five weeks pregnancy and complaints of bleeding per vaginum associated with mild lower abdominal discomfort. The diagnosis of CSP with a live fetus within the gestational sac was made on a transvaginal ultrasound examination and later confirmed with a magnetic resonance imaging (MRI)...
March 2017: Oman Medical Journal
https://www.readbyqxmd.com/read/28437802/surveillance-after-resection-of-pancreatic-ductal-adenocarcinoma-with-curative-intent-a-multicenter-survey-in-germany-and-review-of-the-literature
#20
Thomas J Ettrich, Lucas A Schulte, Natalie Eitel, Kristin Ettrich, Andreas W Berger, Lukas Perkhofer, Thomas Seufferlein
Background Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal cancers with high risk of relapse even after curative-intended resection. There are no evidence-based recommendations for surveillance in actual guidelines. Given this situation and as a basis for prospective studies, we wanted to determine the current practice of surveillance after pancreatic cancer resection in German institutions. Methods A web-based questionnaire was sent in 2015 to 300 German institutions (hospitals, outpatient clinics, and private practices) experienced in the care of patients with PDAC...
April 24, 2017: Zeitschrift Für Gastroenterologie
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