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The health effects of obesity in adults have been closely studied, but obesity’s influence on adolescents hasn’t been examined as extensively. At RSNA 2016, a group of researchers presented a study of obesity’s effects on adolescent bone growth; they used a specialized type of CT and DXA scans to measure bone thickness, and their results were unexpected.

— Dave Yeager, editor

Obesity in Adolescence May Cause Permanent Bone Loss

Teenagers who are obese may be doing irreparable damage to their bones, according to a study presented at RSNA 2016. Obesity in childhood and adolescence is associated with a number of health risks, including cardiovascular disease and diabetes. For the study, researchers are looking at how excess weight may affect bone structure.

According to the study’s lead author, Miriam A. Bredella, MD, a radiologist at Massachusetts General Hospital and an associate professor of radiology at Harvard Medical School in Boston, “While obesity was previously believed to be protective of bone health, recent studies have shown a higher incidence of forearm fractures in obese youths.”

Bredella and colleagues seek to determine the relationship between adolescent obesity and bone structure. The researchers have recruited 23 obese adolescents with a mean age of 17 years and a mean body mass index (BMI) of 44 kg/m2 for the ongoing study.

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More Bubbles, Less Trouble

Real-Time Radiotherapy

Door to the Future?

Five Things to Watch in 2017

Your Brainprint Is as Distinct as Your Fingerprints

fMRI Categorizes Four Depression Subtypes

CT Shines Light on a Branch
of the Vertebrate Family Tree

How a Knee Injury Changes Your Brain

Worth Repeating

More Bubbles, Less Trouble
Contrast-enhanced ultrasound shows promise for liver imaging. Read more »

Real-Time Radiotherapy
Combining MRI with radiation therapy has the potential to target tumors more precisely. Read more »

Door to the Future?
Patient portals may allow radiologists to demonstrate their value in new ways. Read more »

Five Things to Watch in 2017
There was plenty to see at RSNA 2016. Here are five things that caught our attention. Read more »

Your Brainprint Is as Distinct as Your Fingerprints
A team of researchers led by Carnegie Mellon University have used diffusion MRI to study the brain’s structural connections. What they found is that the combination of those connections is so highly individualized that it can identify a person as accurately as a fingerprint.

fMRI Categorizes Four Depression Subtypes
Patients with depression can be categorized in four distinct subtypes, according to researchers at Weill Cornell Medicine. The researchers say the finding will help physicians diagnose depression more accurately and treat it more effectively.

CT Shines Light on a Branch of the Vertebrate Family Tree
Researchers at the University of Chicago used high-definition CT to study the fossilized skull of a 280 million-year-old chimaera, a type of fish related to cartilaginous fish such as sharks, and place it more accurately on the tree of life. The scans of the Dwykaselachus oosthuizeni fossil revealed structures of the brain, major cranial nerves, nostrils, and inner ear that are seen in modern-day chimaeras.

How a Knee Injury Changes Your Brain
A study from Ohio State University shows how the brain adapts to a knee injury. MRI scans of the brain were used to compare the brains of healthy individuals with those of people who had suffered an ACL tear. The researchers noted significant differences in how the subjects’ brains processed visual cues.

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