Eric Barnes

Interventional
Immediate postsurgery MRI appears safe for stent patients
Doctors are reluctant to image the heart with MRI in the days after stent implantation, fearing that the newly implanted devices could move or warm inside the scanner. There are also concerns that even minute motion or heating of stents could predispose patients to early stent thrombosis, increasing morbidity and mortality. But fears over MR use in such cases may be unfounded, according to a new study from Duke University Medical Center in Durham, NC.
October 1, 2006
Digital X-Ray
New contrast injectors go with the digital flow
Today's CT contrast injectors are joining the connectivity revolution. The most advanced power injectors can link contrast information to radiology reports, scanners, and PACS. They are improving image data by micromanaging contrast flow rates to lengthen peak enhancement periods, while making scans safer by detecting contrast extravasation.
September 27, 2006
2006 09 27 15 24 24 706
CT
VC finds early niche in screening
In an important validation of virtual colonoscopy's utility as a complementary colorectal cancer screening exam, Wisconsin researchers report a high correlation between VC and optical colonoscopy results in patients referred for follow-up polypectomy in a new study published online in Radiology.
September 26, 2006
CT
New models identify probability of gene mutations for colorectal cancer
In two new studies to be published in the September 27 Journal of the American Medical Association, researchers demonstrated effective prediction models that incorporate personal and family medical histories to identify patients with a gene mutation associated with a certain type of colorectal cancer.
September 25, 2006
CT
64-slice CTA handles fast hearts
CT angiography (CTA) images are clear and readable at various heart rates on 64-detector CT, according to a new study by researchers from Switzerland. But while overall heart rates made little difference for visualizing the coronary arteries, heart rhythm mattered far more. Beta-blockers reduced artifacts across the board, but were more useful for taming irregular heart rhythms than for slowing heart rates, the group noted.
September 19, 2006
CT
CT assesses plaque composition, but with difficulty
Mean attenuation scores at multidetector-row CT show distinct and reliable differences in the composition of atherosclerotic plaques, far surpassing the capabilities of ultrasound, according to a new study from Massachusetts General Hospital (MGH). But on a 16-slice MDCT scanner, overlapping attenuation values still make it difficult to assign specific plaque composition types to specific tissue samples.
September 17, 2006
CT
CAD will be key to VC screening
As computer-aided detection (CAD) systems for virtual colonoscopy (VC) grow more sophisticated, they will become key ingredients for virtual colonoscopy practice, according to Dr. Christopher Beaulieu, who spoke about the forces driving the need for CAD in VC screening.
September 12, 2006
MRI
Technology broadens scope of cardiac MR
From perfusion imaging to infarct detection and guided intervention, cardiac MRI (CMRI) is gaining utility and fans in the academic world and beyond. The options are poised to expand rapidly in the coming years thanks to better coil designs, higher field strengths in scanners, and specialized contrast agents, to name a few of the forces shaping CMR's future.
September 10, 2006
2006 09 01 16 37 22 706
CT
Furosemide beats saline in MDCT urography
Multidetector CT is a mainstay modality for evaluating urinary conditions, but peristalsis makes it difficult to obtain a single image in which all urinary tract segments are opacified and distended. A group from Brigham and Women's Hospital in Boston retrospectively evaluated whether administration of intravenous furosemide, either alone or in addition to intravenous saline, improved the depiction of the normal urinary collecting system at multidetector row CT urography.
September 7, 2006
Digital X-Ray
AuntMinnie.com Cardiac Imaging Insider
September 5, 2006
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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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MRI
Unclear explanations of contrast MRI exams heighten patient anxiety
Mammo Reading 400
Womens Imaging
Mammography screening improves survival for late-stage cancers
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Ultrasound
Ultrasound MinnieCast, Episode 2: Body imaging with RUS-PAT
How Agentic AI Is Transforming Radiology Ops
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Researchers offer hypothesis for long COVID brain fog
By Will Morton
A group in France has offered an explanation for long COVID brain fog, with the concept based on a visual brain pattern they discovered on patient PET scans.
October 19, 2023
Hypometabolism detected with F-18 FDG-PET in long-COVID patients: putative astrocyte dysfunction and glutamatergic dysregulation. (A) PET scan of a healthy subject. (B) PET scan of a long COVID patient. Hypometabolic areas are indicated with arrows. (C) A diagram showing a healthy condition in which an astrocyte has a normal capacity to take up glutamate and recycle it to sustain glutamatergic neurotransmission, giving rise to normal glucose utilization and lactate production to ensure adequate neuronal energy supply. (D) A diagram showing a long COVID condition in which an astrocyte has reduced glutamate uptake capacity, leading to reduced glutamate recycling, lower glucose utilization (observed with F-18 FDG-PET as hypometabolism) and lower lactate production, dysregulating glutamatergic neurotransmission, and possibly endangering neuronal survival.
Prior authorization adds to patient burden in cancer care
By Amerigo Allegretto
Prior authorization is required for over 70% of imaging services for cancer care.
October 19, 2023
Insurance Policy 400
How Medicaid unwinding could impact radiology practices
By Sandy Coffta
In a new column, Sandy Coffta of HAP describes how recent Medicare developments could significantly affect radiology practices.
October 19, 2023
Sandy Coffta.
Ultralow-dose chest CT bests x-ray in the emergency department
By Kate Madden Yee
In nontraumatic emergency department patients, ultralow-dose chest CT offers more than twice the detection rate for main diagnoses compared with chest x-ray.
October 19, 2023
Ct Scanner Bore
Venture capital funding will prompt radiology AI clearances
By Liz Carey
Based on recent correlations between venture capital funding and FDA clearances, FDA-cleared radiology AI offerings are expected to increase substantially.
October 18, 2023
Artificial Intelligence Ai
Low-field-strength MRI could be alternative for fetal imaging
By Amerigo Allegretto
An abbreviated low-field-strength fetal MRI protocol can produce reliable structural and functional measures of the fetus and placenta in pregnancy.
October 18, 2023
Images show fetal T2-weighted fast-spin-echo 0.55-T MRI scans at various gestational ages. (A) Miduterine coronal anatomic views from eight representative healthy pregnant participants (scans in control group); (B) planned brain views in sagittal, coronal, and axial orientation from eight representative healthy pregnant participants (scans in control participants); and (C) lung views from eight representative healthy pregnant participants (scans in control group). The scans are shown in four gestational age ranges.
COVID-19 AI model boosts disease detection by radiologists
By Will Morton
An AI algorithm designed to diagnose COVID-19 has been validated in a study by radiologists who interpreted x-rays with and without the model.
October 18, 2023
Results of Grad-CAM and Grad-CAM++ for the deep-learning model: (A) normal, (B) pneumonia, and (C) COVID-19. Left column, original chest x-ray image; middle column, result of Grad-CAM; right column, results of Grad-CAM++ .
Enterprise imaging: What is the market opportunity beyond radiology?
By Amy Thompson
Amy Thompson of Signify Research assesses the future prospects for the enterprise imaging market.
October 18, 2023
Amy Thompson of Signify Research.
AI gives high risk scores to nearly 40% of breast cancers at screening
By Amerigo Allegretto
Nearly four in 10 cases of screen-detected and interval cancers had the highest AI risk score at prior screening.
October 18, 2023
Breast Cancer 3 D 400
Top trends impacting the ultrasound market
By Mustafa Hassan
Mustafa Hassan of Signify Research discusses recent trends in the ultrasound market.
October 17, 2023
Suit Graph Up
Intravenous thrombolysis before thrombectomy improves stroke outcomes
By Kate Madden Yee
Patients with acute ischemic stroke with a large infarct core may benefit from treatment with intravenous thrombolysis before endovascular thrombectomy.
October 17, 2023
Brain Stroke
Older, rural children face barriers to appendix ultrasound access
By Amerigo Allegretto
Rural, older, and poorer children face barriers in obtaining an ultrasound exam for acute appendicitis.
October 17, 2023
Rural 400
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