Eric Barnes

[email protected]

64-slice CT takes on dual-source in cardiac radiation dose

Does dual-source CT imaging produce half the dose or twice the dose of single-source 64-slice CT -- or something in between? Researchers from the Cleveland Clinic Foundation imaged more than 500 patients on one scanner or the other to find out how the effective dose stacked up in the imaging of several cardiac indications.

January 25, 2007

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Gastroenterologists plan to perform VC

A recent report by the American Gastroenterological Association (AGA) outlines plans for gastroenterology practices to not only incorporate virtual colonoscopy into colon cancer screening, but bypass radiologists entirely to scan patients on their own. Leading gastroenterologists and radiologists weigh in on the report.

January 24, 2007

Cardiac Imaging

AuntMinnie.com Cardiac Imaging Insider

January 21, 2007

Triple-rule-out CT yields even contrast enhancement

Researchers in Florida have developed a triphasic multidetector-row CT (MDCT) method for ruling out the three most dangerous causes of chest pain. Their 64-slice CT protocol examines the coronary arteries, pulmonary arteries, and the aortic arch in a single pass, generating even contrast enhancement in all three regions.

January 21, 2007

German screening trial finds high accuracy for VC

Results from the first 300 patients screened in the ongoing Munich Colorectal Cancer Prevention Trial indicate that virtual colonoscopy with 64-slice CT is sensitive and specific for the detection of polyps of all sizes. The researchers in Germany found that conventional colonoscopy had a slight edge in diminutive polyps, but virtual colonoscopy did a little better with the larger lesions.

January 16, 2007

Adenosine stress safe for MR perfusion

MR stress perfusion imaging (MSPI) with adenosine is safe even for daily clinical use, according to researchers from Germany who used it in patients with suspected coronary artery disease. Adenosine is an effective stress agent, and major side effects are both rare and reversible, the team reported.

January 15, 2007

AuntMinnie.com CT Insider

January 9, 2007

CT distinguishes asbestos lung damage from smoking impairment

A new study finds that CT can apportion the blame for lung function impairment between patients' asbestos exposure and their smoking-related emphysema. The preliminary results will require further validation, but the authors believe the results are clear enough to have medicolegal implications, inasmuch as doctors have traditionally found it difficult until now to differentiate between the two common causes of lung impairment.

January 9, 2007

C-RADS reporting yields effective VC analysis

C-RADS, the virtual colonoscopy reporting system developed by the Virtual Colonoscopy Working Group, is an efficient way to evaluate practice experience in virtual colonoscopy, and can be used to compare exam quality, readers, and patient cohorts, according to researchers from Boston.

January 8, 2007

Image Processing

'Instant replay' fluoroscopy cuts radiation dose in children

If you've ever watched a fluoroscopy study fly by and muttered something less printable than "Wait -- what was that again?" you may not be alone. Considering how fast physiologic processes happen, a little instant-replay action could go a long way toward nailing the diagnosis. Now researchers from Israel have found that a software feature known as last fluoroscopy hold (LFH) can dramatically reduce the need for another pass at the patient, thereby reducing the radiation dose and saving time.

January 8, 2007

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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.

Hands Anxiety Adobe Ka Peopleimages

Unclear explanations of contrast MRI exams heighten patient anxiety

Mammo Reading 400

Mammography screening improves survival for late-stage cancers

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Ultrasound MinnieCast, Episode 2: Body imaging with RUS-PAT

How Agentic AI Is Transforming Radiology Ops

How Agentic AI Is Transforming Radiology Ops

NIH highlights PET study in Parkinson’s disease

The NIH has highlighted a study that shows cardiac PET scans can help identify people at risk for Parkinson’s disease.

November 9, 2023

Heart and brain PET scans from a study participant who developed Parkinson’s disease support a “body first” progression. The top pair of PET scan images show low F-18 dopamine-derived radioactivity in the heart (right, with N-13 ammonia PET scan on left). Later, brain scans showed a loss of dopamine-producing neurons and the individual developed symptoms of the disease. Image courtesy of the National Institutes of Health.

MRI most cost-effective way to evaluate ED patients with dizziness

By Kate Madden Yee

MRI is the most cost-effective imaging modality for evaluating patients presenting to the emergency department (ED) with dizziness, research suggests.

November 9, 2023

AI modeling detects, classifies breast microcalcifications

By Amerigo Allegretto

A novel AI tool can accurately detect and characterize macrocalcifications on mammography, according to an Italian study.

November 9, 2023

Breast Cancer2 400

Features found on MRI may predict liver cancer recurrence after surgery

By Kate Madden Yee

An algorithm based on MRI features could help clinicians predict liver cancer recurrence after patients have undergone liver resection, researchers have found.

November 8, 2023

Preoperative axial extracellular contrast agent-enhanced (A-E) MRI and (F-H) follow-up CT images in a 71-year-old male patient with chronic hepatitis B and a serum neutrophil count of 4.2 × 109/L. A 5.6-cm mass with a 1.9-cm satellite nodule was detected in segments V and VIII. (A) The mass (asterisks, A-E) shows mild-to-moderate hyperintensity on T2-weighted images, (B) hypointensity on T1-weighted noncontrast-enhanced images, (C) less than 50% hyperenhancement on late arterial phase images, (D) nonperipheral washout and incomplete enhancing capsule on portal venous phase images, and (E) marked diffusion restriction on diffusion-weighted images (b = 800 sec/mm2). The mass was confirmed at histopathologic analysis as moderately differentiated hepatocellular carcinoma with microvascular invasion. With an advanced-stage recurrence after resection score of 19.8 points (4.2 + 5.6 + 10), this patient was assigned to the high-risk group (≥15 points) for advanced-stage recurrence. At follow-up, (F) noncontrast-enhanced, (G) arterial phase, and (H) portal venous phase CT images acquired at day 70 after surgery show multifocal intrahepatic recurrence and tumor thrombus in the left portal vein (black arrow, H). Images and caption courtesy of the RSNA.

Mammography-based nomogram predicts breast microcalcifications

By Amerigo Allegretto

A mammography-based radiomic nomogram could be useful in predicting risk of malignancy in suspicious breast microcalcifications.

November 8, 2023

Breast Mammo Computer 400 (2)

Playkits develop role in easing kids' anxiety over MRI scans

By Edna Astbury-Ward, PhD

Giving young children a playkit that uses both virtual and augmented reality appears to reduce anxiety about this procedure, U.K. researchers report.

November 8, 2023

A smartphone is a key component of the playkit devised by the Sheffield team. Photo courtesy of DYR in collaboration with Dubit UK.

PET predicts chemotherapy responses in breast cancer patients

PET/CT with gallium-68 FAPI radiotracer can predict responses to neoadjuvant chemotherapy in breast cancer patients.

November 8, 2023

Representative Ga-68 FAPI-PET/CT images of 48-year-old woman who had left invasive ductal carcinoma and who achieved pathologic complete response (pCR). (A) Baseline maximum-intensity projection (MIP) image demonstrated primary lesion (red arrowhead; SUVmax, 26.72) and Ga-68 FAPI-avid lymph node in left axilla (red arrows). (B) MIP image after two cycles of neoadjuvant chemotherapy (NAC) showed that primary lesion (red arrowhead; SUVmax, 8.87) and axillary lymph nodes (red arrow) were reduced in size and radioactivity uptake. (C and D) Representative images of lab tissue staining for FAP before NAC showed strong FAP-positive staining in stromal cells (C), which was significantly decreased on tumor bed after six cycles of NAC (D). Image courtesy of the Journal of Nuclear Medicine.

20-year study shows that lung cancer screening boosts survival rates

By Kate Madden Yee

Diagnosing early-stage lung cancer with low-dose CT translates to a 20-year survival rate of 81%, according to a large-scale study.

November 7, 2023

(A, B) Two annual repeat low-dose CT scans in a woman who was 60 years old at baseline enrollment in 1999. At baseline enrollment, she was currently smoking and had a 30-pack-year smoking history. No nodules were identified on baseline low-dose CT scans. On the sixth annual low-dose CT scan (B), a right lower lobe solid nodule (arrow) measuring 4.5 mm in maximum diameter was identified. The nodule could be identified in retrospect on the prior annual CT scan (arrow in A), when it measured 2 mm in maximum diameter. Estimated tumor volume doubling time was 161 days. Lobectomy was performed two months later, and diagnosis of stage 1aN0M0 moderately differentiated adenocarcinoma measuring 6 mm in maximum diameter was made. Expert pathologic panel review (22) of the pathologic specimen updated the diagnosis to adenocarcinoma with mixed subtype (80% acinar, 20% bronchoalveolar carcinoma components) with 5 mm of invasion. Images and caption courtesy of the RSNA.

Formal training leads to improved POCUS use for surgeons

By Amerigo Allegretto

A formal point-of-care ultrasound (POCUS) curriculum can improve the use of the technology by surgeons.

November 7, 2023

Surgeons Smiling 400

Imaging and 3D printing enhance teaching of anatomy

The use of cross-sectional imaging and 3D printing may enhance teaching of spinal anatomy in undergraduate medical education.

November 7, 2023

Julianna Czum talks AI chest radiograph study with AuntMinnie.com

By Amerigo Allegretto

Julianna Czum, MD, spoke with AuntMinnie.com on a study that tested a deep-learning algorithm on triaging chest radiographs.

November 6, 2023

Julianna Czum Interview

'Moral injury' common among interventional radiologists

By Kate Madden Yee

Moral injury is common among interventional radiologists, according to a study published November 3 in Academic Radiology.

November 6, 2023

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