COVID-19 and its Mimics: What the Radiologist Needs to Know.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the current outbreak of Coronavirus disease 2019 (COVID-19). Although imaging should not be used for first-line screening or diagnosis, radiologists need to be aware of its imaging features, and those of common conditions that may mimic COVID-19 pneumonia. In this Pictorial Essay, we review frequently encountered conditions with imaging features that overlap with those that are typical of COVID-19 (including other viral pneumonias, chronic eosinophilic pneumonia, and organizing pneumonia), and those with features that are indeterminate for COVID-19 (including hypersensitivity pneumonitis, pneumocystis pneumonia, diffuse alveolar hemorrhage, pulmonary edema, and pulmonary alveolar proteinosis).

Radiology podcasting as a model for asynchronous remote learning in the COVID-19 era.

RATIONALE AND OBJECTIVES: We aimed to create an open access online radiology podcast to educate listeners at any time, from anywhere. To meet learner needs and improve the likelihood of successful implementation and utilization, we assessed radiology trainee attitudes and experiences of podcasts. MATERIALS AND METHODS: We developed an educational podcast, From the Viewbox, focused on evergreen themes and practical approaches to radiology. Content categories included Diagnostic Approach, Specific Imaging Diagnoses, Noninterpretive Skills, and Special Topics. We released and promoted episodes on multiple digital platforms. Radiology trainees were surveyed and data were analyzed to assess listener preferences and usage trends. RESULTS: Only 19% of our trainees had previously listened to a radiology podcast, yet 81% expressed interest in listening routinely. After initial release, 86% of trainees listened to the podcast and 62% listened routinely. Episodes gained the most plays immediately following release but retained and continued to attract more listeners. The most popular episode discussing COVID-19 diagnosis and imaging, emphasized the importance of selecting high yield content to match listener needs. Most trainees felt the podcast had "very high" or "high" value in educational value, accessibility, and time efficiency. CONCLUSIONS: From the Viewbox offers efficient and accessible audio-only learning modules that can be used independently or effectively paired with traditional resources to decrease barriers in radiology education and enhance learner productivity. Podcasting is an underutilized asynchronous remote learning tool that can help overcome current challenges of social distancing, and more importantly address the diverse preferences and needs of our learners.

Impact of the COVID-19 pandemic on emergency department CT for suspected diverticulitis.

PURPOSE: This study examined the impact of the COVID-19 pandemic on emergency department CT use for acute nontraumatic abdominal pain, to better understand why imaging volume so drastically decreased during the COVID-19 pandemic. METHODS: This was a retrospective review of emergency imaging volumes from January 5 to May 30, 2020. Weekly volume data were collected for total imaging studies, abdominopelvic CT, and abdominopelvic CTs positive for common causes of acute nontraumatic abdominal pain. Two emergency radiology attendings scored all diverticulitis cases independently, and weekly volume data for uncomplicated and complicated diverticulitis cases was also collected. Volume data prior to and during the COVID-19 pandemic was compared, using 2019 volumes as a control. RESULTS: During the COVID-19 pandemic, overall emergency imaging volume decreased 30% compared to 2019 (p = 0.002). While the number of emergency abdominopelvic CTs positive for appendicitis and small bowel obstruction did not significantly change during the COVID-19 pandemic, the number of cases of diverticulitis decreased significantly compared to 2019 (p = 0.001). This reduction can be specifically attributed to decreased uncomplicated diverticulitis cases, as the number of uncomplicated diverticulitis cases dropped significantly (p = 0.002) while there was no significant difference in the number of complicated diverticulitis cases (p = 0.09). CONCLUSIONS: Reduced emergency abdominopelvic CT volume during the COVID-19 pandemic can partially be explained by decreased imaging of lower acuity patients. This data may help formulate future strategies for imaging resource utilization with an improved understanding of the relationship between perceived imaging risk and symptom acuity.