Eric Barnes

CT
Double dose of oral sodium phosphate unnecessary for VC
In virtual colonoscopy, the double-dose (90 mL) sodium phosphate bowel cleansing regimen, despite its proven effectiveness, may be too much of a good thing, according to researchers from the University of Wisconsin in Madison. The group compared the 90 mL (double) sodium phosphate cleansing regimen against that of a 45 mL (single) regimen, and found the single dose to be as effective as the double-dose regimen.
February 18, 2007
CT
Radiologists are principal source of variability in nodule localization
A number of lung cancer screening studies have examined the variability of reported nodule sizes, but variability in the localization of nodules in 3D space has been somewhat overlooked. Now a new study from the Lung Imaging Database Consortium (LIDC) finds that nodule placement in the 3D space is highly variable, and that the variation depends more on the radiologist than the drawing method used to determine its spatial location.
February 14, 2007
CT
Radiation dose slashed in 64-slice coronary CTA
In an important new study from Virginia, radiologists compared standard retrospectively gated coronary CT angiography (CCTA) to a new prospectively gated technique, and achieved dose reductions of up to 83% with the new method -- all without loss of image quality or diagnostic utility.
February 14, 2007
2007 02 14 17 25 07 706
MRI
MR colonography reveals significant extracolonic findings
MRI has joined the parade of extracolonic findings detected at virtual colonoscopy, in a study of 375 symptomatic individuals in Germany. In evaluating dark-lumen MR colonography (MRC) for assessing extracolonic organs, researchers from University Hospital Essen found clinically significant findings in 12% of their cohort.
February 13, 2007
CT
Relative threshold method correlates CT, MRI stroke infarct assessment
SAN FRANCISCO - Researchers at the 2007 International Stroke Conference are making progress toward standardizing imaging and clinical criteria for the optimal treatment of stroke patients. The preliminary results from a study by Boston researchers are good news for CT perfusion imaging, which is faster and generally more available than MRI to handle emergent stroke cases.
February 8, 2007
2007 02 12 14 10 46 706
CT
Group uses electron beam CT for functional CT of kidneys
Many recent advances in CT have focused on creating high-resolution anatomical images from thin-section data. Functional research has largely been relegated to the sidelines. But a new experiment is promising in its use of functional CT to fill a real clinical need. Researchers measured the kidney's glomerular filtration rate using electron beam CT (EBCT) in an animal model.
February 7, 2007
CT
VC CAD delivers accuracy on unfamiliar datasets
The National Institutes of Health tested its virtual colonoscopy computer-aided detection (CAD) system on a patient cohort it wasn't trained on, garnering high marks for sensitivity and specificity in a sizeable study. Fortunately it found all the cancers, too.
February 4, 2007
2007 02 05 12 25 36 706
CT
CT overranging an important but hidden radiation source
With multidetector CT scanners, what you see in the protocol isn't exactly what you get. Differences in overranging, also known as z overscanning, can lead to significant variations in the radiation dose delivered by different multidetector CT scanners and reconstruction algorithms, according to a new study from Leiden University Medical Center in the Netherlands.
January 31, 2007
CT
AuntMinnie.com Virtual Colonoscopy Insider
January 30, 2007
MRI
Radial sampling in coronary MR shows vulnerable nonstenosed vessels
Coronary vessel wall imaging is a promising way to depict outward blood vessel modeling when luminal stenosis is absent, potentially improving doctors' ability to evaluate blood vessels with an elevated risk of plaque rupture. A new study from Germany shows that radial k-space sampling is better than Cartesian sampling for examining such vessels in 3D turbo field-echo MRI sequences.
January 28, 2007
2007 01 26 16 46 34 706
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Molecular Imaging
PET predicts faster cognitive decline in women than men
Women initially outperformed men at low brain tau levels, but the advantage diminished as tau levels increased over time.
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Unclear explanations of contrast MRI exams heighten patient anxiety
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Mammography screening improves survival for late-stage cancers
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