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

Elekta to add functional imaging capabilities and take more time to validate MR-linac system Expects CE approval in first half of 2018

Aspect Imaging scores CE mark for its Embrace Neonatal MR system Already in use in Israel

Updated guidelines recommend use of S-ICDs for patients with ventricular arrhythmia Call to action for physicians

Study cautions against trust in MR results for axial spondyloarthritis MR scans are prone to produce positive results for axSpA in healthy individuals

Mallinckrodt Institute of Radiology installs first Siemens MAGNETOM Vida in the US First Siemens MR scanner to carry BioMatrix technology

MR study shows how different football positions impact brain damage First time DTI and fMRI used in conjunction

Action star Chuck Norris, wife Gena, sue eleven organizations over gadolinium Allege MR contrast agent 'nearly killed her'

Swedish researchers map brains of patients with prosthetic limbs using 7T MR Progress in pursuit of fake limbs that feel real

Using functional MR to predict suicidal tendencies Revealing alterations in brain patterns in response to concepts such as death, cruelty, and trouble

Getting the most from your MR coils As these systems get more complicated, so does repairing them

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

CT, MRI, NM, SPECT/CT, PET & PET/CT service, refurbished systems and parts

Accelerate your ROI with our Black Diamond Certified refurbished systems. One year warranty - ISO 13485 Certified - FDA registered - Over 65k parts in inventory



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 ©2001-2017 DOTmed.com, Inc.
TODOS LOS DERECHOS RESERVADOS