dismiss

Mark your calendars: the next Clean Sweep Live Auction will be on Thursday, January 25th--Click to view the full catalogue

DOTmed Home MRI Oncology Ultrasound Molecular Imaging X-Ray Cardiology Health IT Business Affairs
News Home Parts & Service Operating Room CT Women's Health Proton Therapy Endoscopy HTMs Mobile Imaging
SEARCH
Ubicación actual:
>
> This Story


Conexión o Registro to rate this News Story
Forward Printable StoryPrint Comment

 

 

MRI Homepage

CMS may reimburse MR with cardiac implants beyond 'MR-friendly' Shift attributed to mounting evidence of scan safety

Engineering solution reduces MR production and scanning costs Could cut cost of MR analysis in half

FDA gives nod to MR-conditional labeling for Abbott ICD and CRT-D Labeling will reduce anxiety for patients who need scanning

New technique may pave way toward much lower-cost MR technology Eliminates need for superconducting magnets

Asia-Pacific imaging market to grow at a CAGR of 10 percent through 2021 Technological advancement is one of the main drivers

MR replaces biopsy in kidney cancer assessment Involves multiparametric MR protocols

The five biggest MR stories of 2017 Ultrahigh-powered magnets, a new gold standard in radiotherapy and the Chuck Norris effect on gadolinium

Older pacemakers still safe in MR New findings suggest CMS should change policy to cover these scans

Anatomage launches Anatomage Cloud for medical image sharing Response to rising number of specialists using cone beam CT imaging

Study shows MR can spot presymptomatic patients with Alzheimer's disease Reducing mental decline through earlier diagnosis

This must change for
large, multi-center studies

New research finds brain MR study groups don't reflect U.S. population demographics

por Lauren Dubinsky , Senior Reporter
Sample groups in brain MR studies typically don’t reflect the broader U.S. population, according to new research from the University of California San Francisco.

The researchers are concerned that this may be providing neuroscientists with an incorrect understanding of normal brain development.

Story Continues Below Advertisement

The (#1 Resource) for Medical Imaging and Peripherals. Call 1-949-273-8000

As a Master Distributor for major brands Barco, Philips, and Sony, we offer custom imaging solutions. With our renowned OEM Solutions and Service/Repair Center, Ampronix is a one-stop shop for HD Medical LCD Displays--Printers--Recorders--4K Cameras



The team evaluated a publicly available dataset of brain MR scans from 1,162 children who took part in the Pediatric Imaging, Neurocognition and Genetics (PING) Study. They found that household education and income levels were much higher among the children in the dataset compared to the overall population.

The researchers noted that study investigators usually use this data without considering those demographic differences. They suggested using a weighted version of the dataset that reflects U.S. demographic characteristics such as sex, race, parental education and income.

The team created its own weighted version of the PING dataset and found that it generated a vastly different timeline of brain development during childhood and adolescence than the raw data. For instance, the unweighted data showed that brain regions reach peak size at 12.1 years but the weight data found it more likely occurs at 9.7 years.

"These findings give us pause, because they raise questions about existing knowledge of brain development in children, which is based almost entirely on non-representative samples,” Kaja LeWinn, lead author of the study, said in a statement. "These foundational studies inform our understanding not only of brain development, but also of mental health disorders like depression and autism.”

But in the real world, most cognitive neuroimaging studies are too small to apply the weighting method. This research adds to the ongoing debate in the neuroscience field over the use of small, biased study samples instead of investing in larger samples that represent target populations of interest.

"At a minimum, researchers doing these studies need to be very transparent about the demographic characteristics of their sample, and consider to whom it's reasonable to generalize their findings,” said LeWinn. “That way, when the community sees inconsistent findings across studies of the same research question, we can consider differences in sample composition as one potential explanation."

She did admit that it would be impractical and financially prohibitive to insist that all neuroimaging studies perfectly represent the U.S. population, but that large, multicenter studies should make it a priority.

Back to HCB News
  Pages: 1

MRI Homepage


You Must Be Logged In To Post A Comment

Anuncie
Aumente su conciencia de marca
Subastas + ventas Privadas
Consigue el mejor precio
Comprar Equipo/Piezas
Encuentra El Precio Más Bajo
Noticias diarias
Lee las últimas noticias
Directorio
Examina todos los usuarios DOTmed
Ética en DOTmed
Ver nuestro programa de ética
El oro parte programa del vendedor
Recibir las solicitudes de PH
Programa de distribuidor con servicio gold
Recibe solicitudes
Proveedores de atención de salud
Ver todos los HCP (abreviatura de asistencia médica) Herramientas
Trabajos/Entrenamiento
Encontrar/rellenar un trabajo
Parts Hunter +EasyPay
Obtener presupuestos para piezas
Certificado recientemente
Ver usuarios certificados recientemente
Recientemente clasificado
Ver usuarios certificados recientemente
Central de alquiler
Alquila equipos por menos
Vende equipos/piezas
Obtén más dinero
Mantenga el foro de los técnicos
Buscar ayuda y asesoramiento
Petición sencilla de propuestas
Obtén presupuestos para equipos
Feria comercial virtual
Encuentra servicio para el equipo
El acceso y el uso de este sitio está conforme a los términos y a las condiciones de nuestro AVISO LEGAL & AVISO DE LA AISLAMIENTO
Característica de y propietario DOTmeda .com, inc. Copyright ©2001-2018 DOTmed.com, Inc.
TODOS LOS DERECHOS RESERVADOS