Biomarkers.

Background: The variability in the regional distribution of Aβ-PET signal and its relation to clinical features is debated. We used data-driven approaches to uncover heterogeneity in cortical Aβ-PET signal from a large representative sample collected through the IDEAS study.

Methods: We analysed cross-sectional Aβ-PET collected from 10,361 patients with MCI or mild dementia scanned in 295 PET facilities using one of the 3 FDA-approved tracers.

Biomarkers.

Background: Previous studies on sex differences in amyloid burden have shown inconsistent findings. We examined the effect of sex on amyloid-PET outcomes in a large, real-world, cohort of individuals with cognitive impairment.

Method: The IDEAS study evaluated the clinical utility of amyloid-PET in 18,295 Medicare beneficiaries age ≥65 years with MCI or dementia.

Biomarkers.

Background: Residence in a disadvantaged neighborhood (e.g., high poverty rate, poor housing, etc.

Biomarkers.

Background: The Imaging Dementia-Evidence for Amyloid Scanning (IDEAS) study demonstrated that amyloid PET changes patient management in >60% of Medicare beneficiaries with MCI/atypical dementia. IDEAS had limited racial/ethnic diversity and excluded patients with "typical" amnestic clinical presentations. Here we present preliminary results from the New IDEAS study, which evaluates the clinical impact of amyloid PET in a more racially, ethnically and clinically diverse cohort.

Alzheimer's Imaging Consortium.

Background: The variability in the regional distribution of Aß-PET signal and its relation to clinical features is debated. We used data-driven approaches to uncover heterogeneity in cortical Aß-PET signal from a large representative sample collected through the IDEAS study.

Methods: We analysed cross-sectional Aß-PET collected from 10,361 patients with MCI or mild dementia scanned in 295 PET facilities using one of the 3 FDA-approved tracers.

Alzheimer's Imaging Consortium.

Background: Residence in a disadvantaged neighborhood (e.g., high poverty rate, poor housing, etc.

Drug Development.

Real-World data platforms for Alzheimer's Disease (AD) offer a unique opportunity to improve health equity through better understanding of health disparities and inclusivity in research, which is critical to translatability of research findings. AD research in the US and globally remains largely inaccessible to many individuals due to individual-level, study-level, investigator-level and larger systemic barriers. ALZ-NET, a US-based registry to evaluate longitudinal outcomes of patients being evaluated for or treated with novel FDA-approved AD therapy, and New IDEAS, an observational US-based longitudinal study of amyloid PET clinical utility, both offer opportunities for examining care, inclusivity, and disparities.

Impact of Perceived Discrimination and Pandemic Attitudes on Cancer Screening Behaviors Among Asian American Women: A Sequential Explanatory Mixed-Methods Study.

Purpose: The aim of this study was to assess how pandemic-related health concerns and discrimination affected cancer screenings among Asian American women (AAW).

Methods: A two-phase explanatory mixed-methods study was conducted. In phase 1, a survey was distributed among AAW eligible for lung, breast, or colorectal cancer screening to assess delays during the pandemic, concerns about contracting coronavirus disease 2019 (COVID-19), barriers to care, and experiences of discrimination.

State-Level Medicaid Reimbursement and Imaging Utilization by Medicaid and Children's Health Insurance Program Patients.

Purpose: To determine if relative Medicaid-to-Medicare reimbursement rates are associated with patient imaging utilization.

Methods: This cross-sectional study estimated the association of diagnostic imaging utilization with the state-level Medicaid-to-Medicare reimbursement ratio (MMRR) of professional payments. State-specific reimbursement ratios were computed for each imaging modality.

Noninvasive Quantitative CT for Diffuse Liver Diseases: Steatosis, Iron Overload, and Fibrosis.

Chronic diffuse liver disease continues to increase in prevalence and represents a global health concern. Noninvasive detection and quantification of hepatic steatosis, iron overload, and fibrosis are critical, especially given the many relative disadvantages and potential risks of invasive liver biopsy. Although MRI techniques have emerged as the preferred reference standard for quantification of liver fat, iron, and fibrosis, CT can play an important role in opportunistic detection of unsuspected disease and is performed at much higher volumes.

Stereotactic Body Radiotherapy vs Sorafenib Alone in Hepatocellular Carcinoma: The NRG Oncology/RTOG 1112 Phase 3 Randomized Clinical Trial.

Importance: Most patients with locally advanced hepatocellular carcinoma (HCC) recur within the liver following systemic therapy.

Objective: To determine whether stereotactic body radiation therapy (SBRT) improves outcomes in patients with locally advanced HCC compared with sorafenib alone.

Design, Setting, And Participants: This multicenter phase 3 randomized clinical trial randomized patients with HCC 1:1 to sorafenib or SBRT followed by sorafenib, stratified by performance status, liver function, degree of metastases, and macrovascular invasion.

Estimating the CTDI with helical acquisitions: Results from a national generalizability study.

Background: While many clinical computed tomography (CT) protocols use helical scanning, the traditional method for measuring the volume CT Dose Index (CTDI) requires modifying the helical protocol to perform a single axial rotation. This modification can present challenges and mismatched settings across various scanner models.

Purpose: This study investigates the generalizability of a helical methodology for estimating CTDI across a diverse range of participants, CT scanner models, and protocol parameters.

The QIBA Profile for Dynamic Susceptibility Contrast MRI Quantitative Imaging Biomarkers for Assessing Gliomas.

The dynamic susceptibility contrast (DSC) MRI measures of relative cerebral blood volume (rCBV) play a central role in monitoring therapeutic response and disease progression in patients with gliomas. Previous investigations have demonstrated promise of using rCBV in classifying tumor grade, elucidating tumor viability after therapy, and differentiating pseudoprogression and pseudoresponse. However, the quantification and reproducibility of rCBV measurements across patients, devices, and software remain a critical barrier to routine or clinical trial use of longitudinal DSC MRI in patients with gliomas.

Spaced Repetition Learning: Exploring Its Potential and Practical Application in Radiology Education.

In today's medical landscape, rapidly learning vast amounts of information requires innovative learning methods. Spaced repetition tools (like Anki) aid efficient knowledge absorption and retention among medical trainees. Yet, adoption of these tools in radiology medical student education lags despite proven effectiveness.

Exploring the association between childhood trauma and limbic system subregion volumes in healthy individuals: a neuroimaging study.

Background: Childhood trauma (CT) is a major risk factor for psychiatric disorders. Emotional and cognitive functions are often affected in many psychiatric conditions, and these functions are mediated by the limbic system. However, previous research has primarily focused on patient populations.

State of Practice on Transcranial MR-Guided Focused Ultrasound: A Report from the ASNR Standards and Guidelines Committee and ACR Commission on Neuroradiology Workgroup.

Transcranial focused ultrasound (FUS) is a versatile, MR-guided, incisionless intervention with diagnostic and therapeutic applications for neurologic and psychiatric diseases. It is currently FDA-approved as a thermoablative treatment of essential tremor and Parkinson disease. However, other applications of FUS including BBB opening for diagnostic and therapeutic applications, sonodynamic therapy, histotripsy, and low-intensity focused ultrasound neuromodulation are all in clinical trials.

Office-Based Diagnostic Imaging Interpreted by Nonphysician Practitioners: Characteristics, Recent Trends, and State Variation.

Purpose: Diagnostic imaging interpretations by nonphysician practitioners (NPPs) are increasing. With hospital-based imaging overwhelmingly interpreted by radiologists, we studied office-based interpretations by NPPs by their physician employer specialty.

Methods: Linking Medicare claims and provider datasets, we identified imaging interpretation claims submitted by nurse practitioners and physician assistants (together NPPs) in office settings, mapping NPPs to physician employer specialties, and assessed NPP characteristics and practice patterns.

Multi-institutional Evaluation and Training of Breast Density Classification AI Algorithm Using ACR Connect and AI-LAB.

Objective: To demonstrate and test the capabilities of the American College of Radiology (ACR) Connect and AI-LAB software platform by implementing multi-institutional artificial intelligence (AI) training and validation for breast density classification.

Methods: In this proof-of-concept study, six U.S.

Radiotherapy with cetuximab or durvalumab for locoregionally advanced head and neck cancer in patients with a contraindication to cisplatin (NRG-HN004): an open-label, multicentre, parallel-group, randomised, phase 2/3 trial.

Background: Management of patients with locoregionally advanced head and neck squamous cell carcinoma (HNSCC) when cisplatin is contraindicated is controversial. We aimed to assess whether radiotherapy with concurrent and adjuvant durvalumab would improve outcomes compared with radiotherapy with cetuximab.

Methods: NRG-HN004 was designed as an open-label, multicentre, parallel-group, randomised, phase 2/3 trial with safety lead-in conducted at 89 academic and community medical centres in North America.