RSNA 2017 Digital X-Ray Preview
By Brian Casey, staff writer
November 13, 2017

Radiography is medical imaging's first modality, but over a century after its discovery it's still going strong, with new technologies and clinical applications giving x-ray a renewed sense of vibrancy.

At RSNA 2017, one of the most exciting technologies will be artificial intelligence (AI). Researchers are applying AI algorithms to digital x-ray exams to tease new meaning out of the data. For example, AI software will be used to find pneumothoraces and pulmonary nodules on chest radiographs, assess the positioning of feeding tubes, and in general help radiologists get their jobs done.

In a more traditional vein, keeping track of radiography reject rates has always been an important task, but it's gotten even more complicated with the arrival of digital radiography (DR). Several presentations will offer suggestions on how to do it at RSNA 2017.

Radiation dose isn't quite as big an issue in radiography as it is in modalities like CT, but it's always a good idea to keep dose as low as reasonably achievable (ALARA). Several presentations at McCormick Place will discuss work designed to better track and reduce dose.

Interest in digital tomosynthesis continues to percolate. You'll find a number of sessions in Chicago on this intriguing technology, including a study from researchers in Italy who used tomo as part of a lung cancer screening program and also a talk by Japanese researchers who have developed a tomo unit that doesn't need to move to acquire images.

All these talks and presentations are listed below, and if you'd like more information, check out the RSNA 2017 website by clicking here.

See you in Chicago!

Scientific and Educational Presentations
DR database can improve reject rate analysis
Sunday, November 26 | 11:00 a.m.-12:30 p.m. | RCC11 | Room S501ABC
The topic of improving quality control of digital radiography (DR) through the analysis of reject rates will be discussed in this Sunday refresher course moderated by Kevin Little, PhD, a diagnostic medical physicist from Ohio State University Medical Center.
Holistic approach tackles digital x-ray reject analysis
Sunday, November 26 | 11:00 a.m-12:30 p.m. | RCC11C | Room S501ABC
In this Sunday morning refresher course, Alisa Walz-Flannigan, PhD, will discuss strategies for analyzing repeat digital x-ray studies.
Chest x-ray algorithm shows why it made its diagnosis
Sunday, November 26 | 11:35 a.m.-11:45 a.m. | SSA12-06 | Room S403A
A team from India will present a deep-learning algorithm that highlights the areas of the chest x-ray that led to the algorithm's diagnosis.
Deep learning can identify malpositioned feeding tubes
Sunday, November 26 | 11:45 a.m.-11:55 a.m. | SSA12-07 | Room S403A
In this talk, researchers will highlight the potential of deep learning for speeding up the detection of malpositioned feeding tubes in critically ill patients.
Digital tomo improves visualization of foot and ankle arthritis
Sunday, November 26 | 11:45 a.m.-11:55 a.m. | SSA14-07 | Room S406A
Researchers are investigating digital tomosynthesis for a variety of applications. Weight-bearing radiography of individuals with arthritis of the foot and ankle is one such application, and the topic will be covered in this Sunday morning talk.
AI detects large pneumothoraces on chest x-ray
Sunday, November 26 | 12:05 p.m.-12:15 p.m. | SSA12-09 | Room S403A
Artificial intelligence (AI) algorithms can automatically detect large pneumothoraces on chest x-ray -- potentially speeding up detection and reporting of these critical findings, according to this presentation.
Ultrasound beats x-ray for finding pediatric GI obstructions
Sunday, November 26 | 12:30 p.m.-1:00 p.m. | PD204-SD-SUA5 | Lakeside, PD Community, Station 5
Ultrasound did a better job than plain radiography of detecting the cause of gastrointestinal (GI) obstruction in children, according to researchers from the U.S. and Iran.
Deep learning helps find lung nodules on chest x-ray
Monday, November 27 | 11:00 a.m.-11:10 a.m. | SSC03-04 | Room S504CD
A U.K. team has found that deep learning-powered computer-aided detection software could potentially act as a second reader for chest radiographs.
Pixel size of detector doesn't affect hand fracture detection
Monday, November 27 | 11:00 a.m.-11:10 a.m. | SSC14-04 | Room S503AB
If you use a digital radiography detector with smaller pixel sizes, will it result in better detection of fractures in hand radiographs? Not necessarily, according to researchers from France.
Chart technique reduces radiation dose for infant osseous surveys
Monday, November 27 | 11:30 a.m.-11:40 a.m. | SSC14-07 | Room S503AB
In this talk, researchers from the University of Alabama at Birmingham Hospital will discuss their development of a chart listing technique for optimal radiation exposure parameters for osseous surveys of infants using portable digital radiography.
Carbon nanotube tomosynthesis may be better for cystic fibrosis
Monday, November 27 | 12:15 p.m.-12:45 p.m. | PD211-SD-MOA2 | Lakeside, PD Community, Station 2
Could digital tomosynthesis using a digital x-ray system with a carbon nanotube x-ray source serve as a better option than conventional x-ray for imaging patients with cystic fibrosis? Find out in this Monday afternoon poster presentation.
Frame-rate conversion technique can reduce fluoro radiation dose
Monday, November 27 | 12:15 p.m.-12:45 p.m. | PH214-SD-MOA3 | Lakeside, PH Community, Station 3
In this poster, Japanese researchers will present their use of a technique called frame-rate conversion to reduce radiation dose in fluoroscopy studies.
'Virtual dual energy' separates bone from soft tissue on chest x-rays
Monday, November 27 | 12:15 p.m.-12:45 p.m. | PH217-SD-MOA6 | Lakeside, PH Community, Station 6
Illinois Institute of Technology researchers will present their work on a virtual dual-energy tool that enables studies to be produced from conventional digital x-ray exams without requiring double exposures.
Is digital tomo an option for lung cancer screening?
Monday, November 27 | 12:45 p.m.-1:15 p.m. | CH238-SD-MOB2 | Lakeside, CH Community, Station 2
With all the excitement over CT lung cancer screening, radiography has largely been forgotten as a lung screening tool. But could digital tomosynthesis make it relevant again? Researchers from Italy will address that question in this Monday afternoon presentation.
What's the best way to deliver radiography results to outpatients?
Tuesday, November 28 | 3:00 p.m.-3:10 p.m. | SSJ12-01 | Room S104B
Radiologists are being urged to interact more directly with patients, but what's the best way to do it? In this Tuesday afternoon presentation, radiologists from Cincinnati Children's Hospital Medical Center will discuss their development of a system for radiologists to give radiography results directly to outpatients.
Method helps calculate newborn weight, gestational age from x-rays
Wednesday, November 29 | 9:10 a.m.-9:20 a.m. | RC513-04 | Room E352
In this Wednesday morning session, researchers from Spain will describe their efforts to find a better way to calculate the weight and gestational age of critically ill newborns based on anteroposterior chest x-rays.
Double reading skeletal surveys could reduce need for follow-up exams
Wednesday, November 29 | 9:20 a.m.-9:30 a.m. | RC513-05 | Room E352
Before you acquire a follow-up skeletal survey for nonaccidental trauma, it might be a good idea to take another look at the initial exam, according to this study from researchers at Texas Children's Hospital in Houston.
CADx software performs well for bone age assessment
Wednesday, November 29 | 10:50 a.m.-11:00 a.m. | RC513-10 | Room E352
A computer-aided diagnosis (CADx) software application can accurately perform automated bone age assessment in children, a German group has found.
Pediatric x-ray dose is standardized in Portugal
Wednesday, November 29 | 11:10 a.m.-11:20 a.m. | RC513-12 | Room E352
In this Wednesday morning presentation, researchers from Portugal will discuss their project to optimize radiation dose for the most common pediatric plain radiography exams performed in their country. They also aimed to develop diagnostic reference levels to set optimal dose levels that can be used across the nation.
After-hours x-ray may not be necessary
Wednesday, November 29 | 12:15 p.m.-12:45 p.m. | ER225-SD-WEA1 | Lakeside, ER Community, Station 1
In this study, researchers from Ireland found that plain-film abdominal radiographs performed outside of standard working hours were rarely useful and exposed patients to unnecessary radiation while using scarce hospital resources.
What causes delays in hip radiographs for ER patients?
Wednesday, November 29 | 3:50 p.m.-4:00 p.m. | SSM07-06 | Room S403B
A group from Ireland will explore the reason why radiographs of hip fractures are delayed in the emergency room (ER) setting in this Wednesday afternoon presentation.
Automated image quality tool is adapted for pediatric studies
Thursday, November 30 | 11:10 a.m.-11:20 a.m. | RC613-12 | Room S102CD
In this Thursday talk, researchers from Duke University will explain how they took a tool developed for automated assessment of image quality in adult chest radiographs and adapted it for use in children.
Is there a better way to calculate patient radiation dose in radiography?
Thursday, November 30 | 12:45 p.m.-1:15 p.m. | PH263-SD-THB5 | Lakeside, PH Community, Station 5
In this poster presentation, researchers from Belgium will describe their efforts to develop more-personalized radiation doses for posteroanterior chest radiography studies using information on body habitus that is available in the DICOM header of images.
How to use a radiographic simulator to practice x-ray exams
All day | IN114-ED-X | Digital education exhibit
Capturing flawless x-ray images demands precise timing and positioning. Researchers from Japan will demonstrate how to use their radiographic simulator to cultivate x-ray imaging skills without risking radiation exposure.