Cynthia E. Keen

[email protected]

Practice Management

Incidental findings during research: rare, but need follow-up

A new study published this week in Archives of Internal Medicine indicates that incidental findings frequently occur on imaging studies performed for medical research. Although only a few of these findings turn out to be clinically significant, it's important for research centers to have a plan for dealing with them.

September 28, 2010

Radiation Oncology/Therapy

Study confirms model for predicting dysphagia after RT

Aggressive treatment using chemotherapy and radiation therapy (RT) is producing better curative and survival outcomes for individuals with head and neck cancers. But these treatments are like a double-edged sword, because the risk of developing acute and late toxicities, especially swallowing dysfunction, is high.

September 23, 2010

Do kids a favor: Publicize ankle radiograph decision rules

How much does it matter if a child with an ankle injury has an x-ray exam that may not be diagnostically beneficial? It matters a lot to a Toronto emergency physician, who is working to increase awareness among her peers about the importance of using proven clinical decision rules for ordering ankle radiographs.

September 23, 2010

What Generation Y radiologists want: the PACS of 2015

NEW YORK CITY - Radiologists who belong to Generation Y are beginning to enter the healthcare workforce. What will these new professionals expect of imaging informatics software? PACS pioneer Eliot Siegel, MD, addressed this topic in a talk on Monday at the Medical Imaging Informatics Symposium.

September 21, 2010

Radiation Oncology/Therapy

Electronic breast brachytherapy does well for APBI and IORT

A pair of recently published studies reported encouraging outcomes for electronic brachytherapy, a relatively new technology that offers the possibility of performing more sophisticated breast radiation therapy without the radiation shielding requirements used in more conventional external-beam treatments.

September 21, 2010

Pediatric Radiology

AuntMinnie.com Pediatric Imaging Insider

September 19, 2010

CHIME: Meaningful use goals seem achievable in 2011-12 ... maybe

Chief information officers of U.S. hospitals are cautiously optimistic about their chances to qualify for federal stimulus payments for "meaningful use" adoption of electronic health records, according to a new survey from the College of Healthcare Information Management Executives (CHIME).

September 19, 2010

Use of CT grows in children with urolithiasis

Children admitted to U.S. pediatric hospitals with symptoms of urolithiasis are more likely to have a CT scan ordered than an ultrasound exam, even though the latter is the recommended initial procedure, according an article in the October issue of the Journal of Urology.

September 14, 2010

Functional MRI may track aberrant pediatric brain development

Five minutes in an MRI scanner can reveal how far a child's brain has developed from childhood to maturity, and it may shed light on a range of psychological and developmental disorders, scientists at Washington University School of Medicine in St. Louis have found.

September 12, 2010

Radiologists identify and treat 'self-embedding' teens

Using ultrasound and a minimally invasive procedure, radiologists can identify and treat patients who engage in a self-injury behavior known as self-embedding, according to a study published online September 7 in Radiology.

September 8, 2010

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PET links brain receptor to emotional numbing in PTSD

To date, only a single study has investigated CB1R availability in humans exposed to trauma.

Contrast Injector 400

CEM, DBT show promise for preoperative breast cancer staging

Amputee Man Adobe Yurakrasil

MRI illumines how the brain maintains 'representation' of phantom limbs

Dexa

3D DEXA reveals lower bone density in diabetes patients

Beer Glasses Adobe Viiviien

Gadolinium in ... beer?

Brain MRI tracks risk of stage IV breast cancer metastases

By Kate Madden Yee

Brain MRI shows promise for surveilling women at risk for asymptomatic stage IV breast cancer metastases by tracking molecular subtypes of the disease.

January 24, 2025

Experts call for CPT codes for imaging AI reimbursement

By Amerigo Allegretto

Imaging AI tools and algorithms continue to be rapidly developed, but experts say reimbursement through CPT codes is needed.

January 24, 2025

Insurance Computer 400

Is herpes infection protective in early Alzheimer’s disease patients?

In a recent PET study with “unexpected” results, patients infected with herpes had fewer signs of brain deposits associated with Alzheimer’s disease than uninfected patients.

January 24, 2025

Triple-negative breast cancers impact female populations differently

By Amerigo Allegretto

Despite overall breast cancer rate increases, women of varying race and ethnicity experience disproportionately higher increases.

January 24, 2025

Breast Cancer Cell2 Social

What brain mechanisms drive depression in older adults?

PET has revealed that mechanisms other than amyloid brain deposits may underlie depressive symptoms in people later in life.

January 23, 2025

MR spectroscopy reveals neurochemical patterns linked to COVID-19

By Kate Madden Yee

Proton MR spectroscopy (MRS) reveals "remarkable" neurochemical patterns associated with COVID-19-induced anosmia, or loss of smell.

January 23, 2025

LI-RADS ultrasound surveillance version 2024 improves HCC detection

By Amerigo Allegretto

The 2024 version of the LI-RADS Ultrasound Surveillance system improves detection of hepatocellular carcinoma (HCC) over earlier iterations.

January 22, 2025

(A,B) Images from an initial ultrasound examination showed no identifiable lesions and received a consensus ultrasound category of US-1. Nearly the entire liver is visualized, with minimal shadowing (“s”, A and B), and the examination received consensus result of VIS-A. The AFP level was 7.1 ng/mL on assessment six months before the ultrasound, 9.1 ng/mL on assessment three months before examination, and 14.2 ng/mL on assessment on exam day. The AFP result was thus assessed as positive based on a progressive increase on two consecutive tests. The atient was considered to have negative surveillance result according to LI-RADS Ultrasound Surveillance v2017, but positive surveillance result according to LI-RADS Ultrasound Surveillance v2024. (C-D) Axial arterial-phase (C) and portal-venous phase (D) T1-weighted images from subsequent gadoxetic acid-enhanced MRI show a 2-cm arterial-phase hyperenhancing observation (arrow, C) with portal-venous washout (arrow, D) in segment 7. This observation was classified on MRI as LR-5, thus meeting the present study’s reference standard for diagnosis of HCC. The mass is located in the periphery of the liver, an anatomic area where ultrasound visualization can be challenging due to shadowing.

Deep learning helps find, segment lung tumors on CT imaging

By Kate Madden Yee

Using a deep-learning model with lung CT imaging shows promise for identifying and segmenting tumors, researchers have reported.

January 22, 2025

EVT promising in patients with extracranial ICA occlusions

Endovascular thrombectomy (EVT) and best medical treatment are both effective and safe options for patients with acute extracranial internal carotid artery occlusions.

January 21, 2025

Images in a 74-year-old male patient who presented at the hospital with acute symptoms of a right hemispheric ischemic stroke and a National Institutes of Health Stroke Scale (NIHSS) score of 24. (A) Nonenhanced CT image shows no signs of early infarction, whereas (B) CT perfusion image shows a large perfusion deficit in the territory of the middle cerebral artery and anterior cerebral artery caused by an extracranial occlusion in the right internal carotid artery. (C) Digital subtraction angiography shows the occlusion in the C1 segment. The extracranial occlusion was passed, reperfused, and subsequently stented (D, E). The final contrast injection did not reveal any intracranial occlusions within the territory of the internal carotid artery (F). At the 24-hour follow-up, there was no infarction on (G) the nonenhanced CT image, and the NIHSS score had decreased to 3 points. Image courtesy of RSNA.

CEUS resolves indeterminate CT, MRI liver observations

By Amerigo Allegretto

Contrast-enhanced ultrasound (CEUS) can resolve some high-risk indeterminate liver observations initially seen on CT or MRI.

January 21, 2025

Images depict a 49-year-old female participant with cryptogenic cirrhosis who presented with a 3.2-cm liver lesion. This biopsy-confirmed hepatocellular carcinoma (HCC) with an initial categorization of Liver Imaging Reporting and Data System (LI-RADS) category LR-4 (probably HCC) at CT was upgraded to LR-5 (definitely HCC) at contrast-enhanced ultrasound (CEUS). (A) Precontrast CT images in the liver show vague hypoattenuation in the medial left hepatic lobe (arrows). (B) Arterial phase images demonstrate no definite arterial phase hyperenhancement (arrows). (C) Washout and an enhancing capsule (arrows) on a late-phase image resulted in an LR-4 categorization. (D) B-mode ultrasound shows a round hypoechoic nodule (arrows). (E) An early-phase CEUS image shows clear arterial-phase hyperenhancement (arrows); (F) No washout at one minute (arrows), and (G) late, mild washout at four minutes (arrows) resulted in a CEUS LR-5 categorization.

PET/CT can rule out CAV in heart transplant patients

Cardiac PET/CT scans can effectively rule out moderate to severe cardiac allograft vasculopathy (CAV) in heart transplant patients.

January 17, 2025

Machine learning can predict immunotherapy response in NSCLC patients

By Kate Madden Yee

Machine learning can help clinicians predict immunotherapy response in patients with inoperable non-small cell lung cancer (NSCLC).

January 17, 2025

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