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Radiology, Nuclear Medicine

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https://www.readbyqxmd.com/read/29319138/calibration-factor-fluctuations-for-radiological-protection-instruments-used-in-nuclear-medicine-departments-experience-from-clor
#1
Kamil Szewczak, Iwona Słonecka, Katarzyna Wołoszczuk, Zuzanna Podgórska, Łukasz Modzelewski
The paper presents the capabilities of CLOR's facility for calibrating radiological protection instruments and the important conclusions drawn from the results of calibrating instruments used in Nuclear Medicine Departments in Poland. The analysis was based on results of the certified calibration of chosen instruments. The result for five types of instruments dedicated for dose rate and contamination measurements were presented. They prove the importance of the calibration process. They show that the calibration factor for one particular instrument may fluctuate by 50% in a one year period as well as by more than 100% for two instruments of the same type...
January 10, 2018: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/29286493/twenty-five-years-of-the-national-academy-of-medical-sciences-of-ukraine-progress-and-priorities-for-future-of-radiation-medicine-and-biology
#2
D Bazyka
After the creation of the Academy of Medical Sciences of Ukraine in 1993 the Research Center for Radiation Medicine was among the first institutions to join the Academy (fig. 1). Estab lishing the Academy was among the first steps of the independent Ukrainian government and aimed to provide a high level health care for population. It was extremely needed for the minimization of Chornobyl medical consequences. This choice was related to a growing recognition of the scientific research in fulfilling the Сenter's mission - study of the effects of low dose radiation on human body and radiation protection of the exposed population...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29262441/imaging-in-neurocritical-care-practice
#3
Craig Williamson, Larry Morgan, Joshua P Klein
The use of neuroimaging in conjunction with serial neurological examinations is a core component of modern neurocritical care practice. Although there is a growing role for other neuromonitoring techniques, the ability to quickly and accurately interpret images in the context of a patient's clinical status arguably remains the indispensable skill for neurocritical care practitioners. Due to its rapid acquisition time and excellent ability to detect intracerebral hemorrhage (ICH), cerebral edema, and signs of elevated intracranial pressure, computed tomography (CT) remains the most useful neuroimaging technique for intensive care unit (ICU) patients...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29242023/open-access-journal-policies-a-systematic-analysis-of-radiology-journals
#4
Anand Narayan, Katie Lobner, Jan Fritz
OBJECTIVE: The open access movement has pushed for greater access to scientific knowledge by expanding access to scientific journal articles. There is limited information about the extent to which open access policies have been adopted by radiology journals. We performed a systematic analysis to ascertain the proportion of radiology journals with open access options. MATERIALS AND METHODS: A search was performed with the assistance of a clinical informationist. Full and mixed English-language diagnostic and interventional radiology Web of Science journals (impact factors > 1...
December 11, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29240310/diagnostic-accuracy-of-high-resolution-t2-weighted-mri-versus-contrast-enhanced-t1-weighted-mri-to-screen-for-cerebellopontine-angle-lesions-in-symptomatic-patients
#5
Mayke A Hentschel, Henricus P M Kunst, Maroeska M Rovers, Stefan C A Steens
OBJECTIVE: To evaluate diagnostic accuracy of high resolution T2-weighted MRI (T2w) for detecting cerebellopontine angle (CPA) lesions compared to a combined protocol including gadolinium enhanced T1-weighted MRI (GdT1w). SETTING: Department of Radiology & Nuclear Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands. PARTICIPANTS: A random sample of MRIs from 350 patients (700 CPAs) with asymmetrical audiovestibular complaints was used, acquired between 2013-2016...
December 14, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29237081/131i-internal-contamination-and-committed-dose-assessment-among-nuclear-medicine-medical-personnel
#6
K Brudecki, A Kluczewska-Galka, T Mróz, B Jarzab, P Zagrodzki, P Janowski
This study presents 131I thyroid activity measurements of 56 employees of the Department of Nuclear Medicine and Endocrine Oncology, Centre for Oncology in Gliwice. The research instrument was a whole-body spectrometer. In 44 out of 56 examined staff members, the determined 131I activity was found to be above the detection limit. The measured activities ranged from 6 ± 2 to 457 ± 118 Bq. The maximum estimated committed effective dose reached was 1.5 mSv/y. The results were compared with previous measurements conducted in another Polish nuclear medical unit...
December 11, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29226851/main-problems-and-suggested-solutions-for-improving-radiation-protection-in-medicine-in-ibero-american-countries-summary-of-an-international-conference-held-in-madrid-2016
#7
Eliseo Vano, Pablo Jimenez, Raul Ramirez, Javier Zarzuela, Ana Maria Larcher, Eduardo Gallego, Santiago Gonzalez, Maria Del Rosario Perez
During the International Conference on Radiation Protection in Medicine held in Bonn in 2012, several areas for improvement were identified, including specific actions related with justification, optimization, role of manufacturers, radiation protection education and training, strategic research, data collection on medical and occupational exposures, prevention of incidents and accidents, radiation safety culture, risk-benefit dialogue and implementation of the radiation safety standards. The outcomes of the Bonn Conference were summarized in the so-called 'Bonn Call for Action', identifying 10 priority actions to enhance RP in medicine...
December 11, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29222581/fractures-in-children-with-newly-diagnosed-hepatoblastoma
#8
Alexander J Towbin, Fernanda D C Braojos Braga, Bin Zhang, James I Geller, Greg M Tiao, Daniel J Podberesky
BACKGROUND: Hepatoblastoma is the most common primary hepatic malignancy in children. We have recently noticed an increased incidence of unsuspected fractures in children with newly diagnosed hepatoblastoma. This association has been suggested in the past, but the incidence and pathophysiology remain uncertain. OBJECTIVE: To define the incidence and imaging features of fractures in children with newly diagnosed hepatoblastoma. MATERIALS AND METHODS: We searched the oncology database and the radiology picture archiving and communication system of our large tertiary care children's hospital between January 2000 and August 2013 for all patients who presented to our institution with newly diagnosed hepatoblastoma...
December 8, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29198424/the-uterine-fibroid-myoma-tumour-analysis-of-the-global-research-architecture-using-density-equalizing-mapping
#9
Dörthe Brüggmann, Frank Louwen, Tatjana Braun, Doris Klingelhöfer, Jan Bauer, Michael H Bendels, Matthias Bundschuh, David Quarcoo, Jenny Jaque, Eileen M Wanke, David A Groneberg
Uterine fibroids can severely impact a woman's quality of life, result in significant morbidity and are a leading indication for hysterectomy. Many aspects of the disease remain largely obscure. Despite these knowledge gaps, no detailed maps of the global fibroid research architecture have yet been generated. This study used the NewQIS approach to assess worldwide research productivity, encompassing numerous aspects of the scientific output, quality and socioeconomic features. Regression analysis indicated an increase in fibroid research activity in the investigated time periods...
November 15, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29196854/fourteen-years-of-progress-testing-in-radiology-residency-training-experiences-from-the-netherlands
#10
D R Rutgers, F van Raamt, W van Lankeren, C J Ravesloot, A van der Gijp, Th J Ten Cate, J P J van Schaik
OBJECTIVES: To describe the development of the Dutch Radiology Progress Test (DRPT) for knowledge testing in radiology residency training in The Netherlands from its start in 2003 up to 2016. METHODS: We reviewed all DRPTs conducted since 2003. We assessed key changes and events in the test throughout the years, as well as resident participation and dispensation for the DRPT, test reliability and discriminative power of test items. RESULTS: The DRPT has been conducted semi-annually since 2003, except for 2015 when one digital DRPT failed...
December 1, 2017: European Radiology
https://www.readbyqxmd.com/read/29190998/radiological-and-nuclear-medicine-imaging-of-sarcoidosis
#11
Anna R Larici, Andor W Glaudemans, Annemilia Del Ciello, Riemer H Slart, Lucio Calandriello, Olivier Gheysens
Sarcoidosis is a multisystem chronic inflammatory disease of unknown etiology characterized by widespread growth of non-caseating granulomas. The diagnosis of sarcoidosis is based on clinical and imaging presentation, histologic confirmation and the absence of alternative diseases. Radiology and Nuclear Medicine play an essential role in the diagnostic work-up of patients with sarcoidosis to assess disease extent and activity. In addition, imaging modalities have shown their potential in managing these patients in terms of treatment response and prognostic assessment...
November 30, 2017: Quarterly Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29173070/generalist-versus-subspecialist-characteristics-of-the-u-s-radiologist-workforce
#12
Andrew B Rosenkrantz, Wenyi Wang, Danny R Hughes, Richard Duszak
Purpose To assess subspecialty practice characteristics of the U.S. radiologist workforce. Materials and Methods This study used the Medicare Physician and Other Supplier Public Use File and did not constitute human subject research. The authors identified 33 090 radiologists who billed for professional services between 2012 and 2014 and used a validated classification system to map services to seven subspecialties and quantify subspecialty-focused effort on the basis of work relative value units (RVUs). Radiologists with more than half of their billed work RVUs in a single subspecialty were designated subspecialists; the remainder were classified as generalists...
November 27, 2017: Radiology
https://www.readbyqxmd.com/read/29169230/ultrasonographic-features-of-pure-ductal-carcinoma-italic-in-situ-italic-of-the-breast-correlations-with-pathologic-features-and-biological-markers
#13
Hwajin Cha, Yun-Woo Chang, Eun Ji Lee, Ji Young Hwang, Hyun Joo Kim, Eun Hye Lee, Jung Kyu Ryu
Purpose: The purpose of this study was to evaluate the ultrasonographic features of pure ductal carcinoma in situ (DCIS) of the breast and to evaluate the correlations of ultrasonographic features with pathologic and biological features. Methods: A total of 141 lesions in 138 women with pure DCIS who underwent preoperative breast ultrasonography were retrospectively reviewed. Ultrasonographic features were analyzed using the American College of Radiology Breast Imaging Reporting and Data System (BI-RADS) ultrasonography lexicon and the diagnostic criteria of the Japan Society of Ultrasonics in Medicine...
October 13, 2017: Ultrasonography
https://www.readbyqxmd.com/read/29166757/hybrid-imaging-of-musculoskeletal-infections
#14
Andor W Glaudemans, Napoleone Prandini, Marco DI Girolamo, Giuseppe Argento, Chiara Lauri, Elena Lazzeri, Mario Muto, Luca M Sconfienza, Alberto Signore
This review article highlights the role of radiological and nuclear medicine techniques in diagnosis of musculoskeletal infections with particular regard to hybrid imaging of osteomyelitis, prosthetic joint infections, sternal infections and spine infections. Authors conclude on the complementary role of the several techniques with indications for an appropriate diagnostic flow chart, in the light of the recent EANM guidelines on infection.
November 22, 2017: Quarterly Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29166752/immunotherapy-treatment-an-issue-for-metabolic-response
#15
Luca Tagliabue, Antonella Capozza, Claudio Maioli, Andrea Luciani, Anna M Ierardi, Gianpaolo Carrafiello
Since the beginning of second decade of this century, when it was introduced in many oncologic scenarios, immunotherapy has become an important tool in the management of a growing number of cancers. Engaging the host immune system in cancer therapy seems to be useful, improving not only progression free survival but also overall survival, until the achieving the goal that many advanced cancers, previously considered without effective treatment options, have now become successfully treatable. Moreover, considering the relatively recent introduction of these drugs in clinical scenarios and the continuous releasing of new drugs, large validated clinical experiences are lacking and many issues are today debated; by the way, the evaluation of the response to immune-therapy poses major concerns...
November 22, 2017: Quarterly Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29151544/-creation-and-evaluation-of-educational-programs-for-additional-delayed-scan-of-fdg-pet-ct
#16
Ryota Wada, Takashi Kamiya, Kouichi Fujino, Junpei Ueda, Kayako Isohashi, Mitsuaki Tatsumi, Jun Hatazawa
Generally, FDG-PET/CT image is acquired at the 60th minute after tracer administration. Depending on the clinical case, additional delayed scans may be useful. However, it is difficult to judge whether additional delayed scan is useful or not. The purposes of this study were creation and evaluation of educational programs to help radiological technologists to decide the usefulness of additional delayed scan of FDG-PET/CT. METHODS: Educational programs consisted of the instructional materials and the judgment test of clinical cases...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/29130901/quantification-of-fat-fraction-in-lumbar-vertebrae-correlation-with-age-and-implications-for-bone-marrow-dosimetry-in-molecular-radiotherapy
#17
Maikol Salas-Ramirez, Johannes Tran-Gia, Christian Kesenheimer, Andreas Max Weng, Aleksander Kosmala, Anke Heidemeier, Herbert Koestler, Michael Lassmann
Absorbed dose to active bone marrow is a predictor of hematological toxicity in molecular radiotherapy. Due to the complex composition of bone marrow tissue, the necessity to improve the personalized dosimetry has led to the application of non-conventional imaging methods in nuclear medicine. The aim of this study is to apply magnetic resonance imaging (MRI) for quantification of the fat fraction in lumbar vertebrae and to analyze its implications for bone marrow dosimetry. Methods First, a highly accelerated two-point Dixon MRI sequence for fat-water separation was validated in a 3T system against the magnetic resonance spectroscopy (MRS) gold standard...
November 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29103917/physician-specialty-and-radiologist-characteristics-associated-with-higher-medicare-patient-complexity
#18
Andrew B Rosenkrantz, Wenyi Wang, Arvind Vijayasarathi, Richard Duszak
RATIONALE AND OBJECTIVES: Meaningfully measuring physician outcomes and resource utilization requires appropriate patient risk adjustment. We aimed to assess Medicare patient complexity by physician specialty and to further identify radiologist characteristics associated with higher patient complexity. MATERIALS AND METHODS: The average beneficiary Hierarchical Condition Category (HCC) risk scores (Medicare's preferred measure of clinical complexity) were identified for all physicians using 2014 Medicare claims data...
November 3, 2017: Academic Radiology
https://www.readbyqxmd.com/read/29101982/acr-appropriateness-criteria%C3%A2-imaging-after%C3%A2-total%C3%A2-knee-arthroplasty
#19
Mary G Hochman, Yulia V Melenevsky, Darlene F Metter, Catherine C Roberts, Jenny T Bencardino, R Carter Cassidy, Michael G Fox, Mark J Kransdorf, Douglas N Mintz, Nehal A Shah, Kirstin M Small, Stacy E Smith, Kathy M Tynus, Barbara N Weissman
Total knee arthroplasty (TKA) is the most commonly performed joint replacement procedure in the United States and annual demand for primary TKA is expected to grow by 673% by 2030. The first part provides an overview of imaging modalities (radiographs, CT, MRI, ultrasound, and various nuclear medicine studies) and discusses their usefulness in the imaging evaluation of TKA. The second part focuses on evidence-based imaging and imaging-guided intervention algorithms for the workup of TKA and its complications, including routine follow-up, component wear, periprosthetic infection, aseptic loosening, granulomas/osteolysis, conventional and rotational instability, periprosthetic fracture, patellar complications, and a variety of periprosthetic soft tissue abnormalities...
November 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29098485/idac-dose-2-1-an-internal-dosimetry-program-for-diagnostic-nuclear-medicine-based-on-the-icrp-adult-reference-voxel-phantoms
#20
Martin Andersson, Lennart Johansson, Keith Eckerman, Sören Mattsson
BACKGROUND: To date, the estimated radiation-absorbed dose to organs and tissues in patients undergoing diagnostic examinations in nuclear medicine is derived via calculations based on models of the human body and the biokinetic behaviour of the radiopharmaceutical. An internal dosimetry computer program, IDAC-Dose2.1, was developed based on the International Commission on Radiological Protection (ICRP)-specific absorbed fractions and computational framework of internal dose assessment given for reference adults in ICRP Publication 133...
November 3, 2017: EJNMMI Research
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