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Digital Mammographic Artifacts on Full-Field Systems: What Are They and How Do I Fix Them?
 
The recent introduction of digital mammography represents a significant technologic advance in breast imaging. However, many radiologists and technologists are unfamiliar with artifacts that are commonly seen with this modality, and recognizing these artifacts is critical for optimizing image quality... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: RadioGraphics.
 
 
There is currently enough evidence and technology available to warrant taking immediate steps to reduce exposure of consumers to cell-phone-related...
 
In the May 27, 2008 Larry King Live show, Dr. Vini Khurana asserted that the danger of cell phones could have far broader health ramifications than asbestos and smoking... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
SPECT-CT and real-time intraoperative imaging: new tools for sentinel node localization and radioguided surgery?
 
It is more than 30 years. Dr. Ramon Cabanas used lymphography to describe the " sentinel node" in patients with penile carcinoma... [+ leia mais]
Colaborador: Rodrigo Biancardi.
Fonte: Journal of Nuclear Medicine and Molecular Imaging.
 
 
Injectable Matrix to Help Regrow Damaged Bones.
 
A new material developed by the University of Nottingham and RegenTec, a university spinoff, is designed to be injected into damaged bone, which then hardens into a strong scaffold as a medium for new bone tissue to grow over... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
Chip-on-a-Pill, and Other Micro-Electro-Medical Devices.
 
The company develops MEMS (microfabricated, multicomponent electronic components) devices for medical applications, small enough to be attached to pills to be used as "ingestible event markers", as well as potential permanently embedded blood glucose monitoring chips... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
SmartBolts Help Avoid Tightening Errors.
 
Stress Indicators, Inc., a Bethesda, Maryland company, has developed specialty mechanical bolts that feature built-in pressure sensors that display colors based on how well a bolt has been tightened. For now only indicated for the construction trade, we envision orthopedic and neuro surgeons may soon see these in the operating theater... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
Curso de Atualização em Controle de Qualidade e Dosimetria em Teleterapia e Braquiterapia – 01/12/08.
 
"O PQRT realizou, entre os dias 27 e 29 de novembro de 2008, o Curso de Atualização em Controle de Qualidade e Dosimetria em Teleterapia e Braquiterapia no CEPON – Centro de Pesquisas Oncológicas, em Florianópolis-SC. O curso foi realizado com apoio do CEPON e da Varian. Devido à tragédia que se abateu sobre o estado de Santa Catarina, infelizmente, alguns participantes, inscritos e ouvintes, não puderam comparecer. Mesmo assim, o curso contou com a presença de vinte alunos e oito palestrantes e colaboradores. "
Colaborador: Anna Maria Campos de Araújo.
Fonte: INCA/PQRT.
 
 
Dosimetric comparison of IMRT vs. 3D conformal radiotherapy in the treatment of cancer of the cervical esophagus.
 
Radiotherapy planning for cervical esophageal cancer is challenging. We compared IMRT and 3D conformal radiotherapy (CRT) with respect to conformality of target coverage and normal tissue sparing... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Intensity modulation with photons for benign intracranial tumours: A planning comparison of volumetric single arc, helical arc and fixed gantry...
 
The potential benefits and limitations of the new RapidArc treatment concept compared to Helical Tomotherapy and fixed gantry intensity modulation techniques have been assessed at treatment planning level on 12 patients presenting with ‘benign’ brain tumours... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Radiotherapy and Oncology.
 
 
Most Planets May Be Seeded With Life.
 
Astronomers have detected a building block of RNA floating within the hot, compact core of a massive star-forming region in the Milky Way. The molecule appears to have formed with all of the other stuff that makes up planets, suggesting that many other worlds are seeded with some of life|s ingredients right from birth... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: ScienceNow.
 
 
Férias coletivas da FAPESP em 2009.
 
A FAPESP estará fechada para o atendimento ao público no período de 12 de janeiro a 4 de fevereiro de 2009 e reabrirá o expediente normal em 5 de fevereiro. Haverá expediente normal de 5 a 9 de janeiro... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: FAPESP.
 
 
Nova observação reforça hipótese de água em lua de Saturno.
 
Astrônomos que estudaram os jatos supersônicos de gás e poeira emitidos por uma das luas de Saturno dizem ter encontrado fortes indícios da presença de água no estado líquido, um ingrediente essencial da vida... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Estadão.
 
 
Morre físico que ajudou a explicar a origem dos elementos.
 
O astrofísico austríaco Edwin E. Salpeter, conhecido por seus estudos sobre as reações nucleares no interior das estrelas, incluindo a equação Salpeter-Bethe sobre como o hélio se converte em carbono, morreu na terça-feira, aos 83 anos. O Falecimento só foi divulgado nesta sexta. Ele sofria de leucemia... [+ leia mais]
Colaborador: Camila Pessoa de Sales.
Fonte: Estadão.
 
 
Subcutaneous Implantable Cardiac Defibrillators.
 
Now Cameron Health, a San Clemente, California company, is trialing a new implantable defibrillator that sits just below the skin and has no leads going to the heart, and so functions more like an external unit... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
Nanoparticles Swim, Navigate, Deliver Payloads.
 
Professor Ayusman Sen and his team at Penn State University have developed a set of tools to propel nanoparticles through liquid, while delivering chemical payload to specific sites. The techniques may lead to future nanoparticle based localized drug delivery systems... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
Smart Virtual Avatars Help Build the Real World.
 
Parametric Technology Corporation, a company out of Needham, Massachusetts that makes engineering design software, is making available for sale a set of virtual manikins, looking very much like the ones in Second Life virtual world... [+ leia mais]
Colaborador: Guilherme Agreli.
Fonte: Medgadget.
 
 
Three-dimensional linear system analysis for breast tomosynthesis.
 
The optimization of digital breast tomosynthesis (DBT) geometry and reconstruction is crucial for the clinical translation of this exciting new imaging technique... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
Mean glandular dose estimation using MCNPX for a digital breast tomosynthesis system with tungsten/aluminum and tungsten/aluminum+silver x-ray anode..
 
Breast cancer screening with x-ray mammography, using one or two projection images of the breast, is an indispensible tool in the early detection of breast cancer in women... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
Image artifacts in digital breast tomosynthesis: Investigation of the effects of system geometry and reconstruction parameters using a linear system..
 
Digital breast tomosynthesis (DBT) is a three-dimensional (3D) x-ray imaging modality that reconstructs image slices parallel to the detector plane. Image acquisition is performed using a limited angular range (less than 50 degrees) and a limited number of projection views (less than 50 views)... [+ leia mais]
Colaborador: Cássio Vilela Komatsu.
Fonte: Medical Physics.
 
 
In vivo quantification of contrast agent concentration using the induced magnetic field for time-resolved arterial input function measurement with MRI
 
For pharmacokinetic modeling of tissue physiology, there is great interest in measuring the arterial input function (AIF) from dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) using paramagnetic contrast agents... [+ leia mais]
Colaborador: Alessandro André Mazzola.
Fonte: Medical Physics.
 
 
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