Monday, November 29 | 11:50 a.m.-12:00 p.m. | SSC07-09 | Room S102D
The use of CT in hospital emergency departments has increased at a higher rate than the technology's use in other settings, according to researchers from Cincinnati Children's Hospital Medical Center.In this session, David Larson, MD, and colleagues will present a study that investigated nationwide trends and factors associated with CT use in the emergency department using data from 1995 to 2007 National Hospital Ambulatory Medical Care Surveys.
During the study time frame, the number of emergency room visits during which patients were imaged with CT increased 84%, from 2.7 million to 16.2 million, an average 16% increase per year. Of this growth, 3.3% was due to increased patient volume, while the remaining 12.7% was due to increased CT use.
Use of CT in the emergency department had not begun to taper by 2007, Larson's team concluded: Factors that contribute to its increased use prevailed over those that limit its use.

















![Images show the pectoralis muscles of a healthy male individual who never smoked (age, 66 years; height, 178 cm; body mass index [BMI, calculated as weight in kilograms divided by height in meters squared], 28.4; number of cigarette pack-years, 0; forced expiratory volume in 1 second [FEV1], 97.6% predicted; FEV1: forced vital capacity [FVC] ratio, 0.71; pectoralis muscle area [PMA], 59.4 cm2; pectoralis muscle volume [PMV], 764 cm3) and a male individual with a smoking history and chronic obstructive pulmonary disorder (COPD) (age, 66 years; height, 178 cm; BMI, 27.5; number of cigarette pack-years, 43.2, FEV1, 48% predicted; FEV1:FVC, 0.56; PMA, 35 cm2; PMV, 480.8 cm3) from the Canadian Cohort Obstructive Lung Disease (i.e., CanCOLD) study. The CT image is shown in the axial plane. The PMV is automatically extracted using the developed deep learning model and overlayed onto the lungs for visual clarity.](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/03/genkin.25LqljVF0y.jpg?auto=format%2Ccompress&crop=focalpoint&fit=crop&h=112&q=70&w=112)

