About the Survey
The participants
The survey was conducted at the RSNA (Radiological Society of North America) 2000 Annual Meeting. A total of 38
physicians participated in the survey.
The process
Stage 1:
The clinical history and angiograms for a patient
were provided. After reviewing the angiograms, participants were asked three questions pertaining to diagnosis, management and follow-up.
Stage 2: The participants were provided with the quantitative blood flow values that were measured by NOVA and the same questions were repeated.
The Case
A 69-year-old man entered an ER complaining of weakness on his left side, slurred speech and blurry vision... An angiogram was ordered.
Results
| Pre-Angioplasty | ||
| Question: |
 |
 |
| Angiogram | NOVA | |
| 1. Is the stenosis hemodynamically significant? |
Yes( 59%)
No( 2.7%) Unsure(37.8%) |
Yes (100%) |
| 2. Would you recommend angioplasty? |
Yes( 32%)
No( 5%) Unsure(62%) |
Yes (70%) No(5%) Unsure(24%) |
| Post-Angioplasty | ||
| Question: |  |
 |
| Angiogram | NOVA | |
| 3. Is flow in the basilar artery restored to normal? |
Yes( 38%)
No( 8%) Unsure(54%) |
Yes (100%) |
Conclusion
The survey conducted at the RSNA Annual Meeting demonstrates how NOVA can
provide an increased level of confidence in assessing the hemodynamic
consequences of stenosis. Following treatment, NOVA quantifies the amount
of improvement in blood flow in ml/min, providing a objective reference for
post-intervention monitoring.
Full results in "The impact of Phase Contrast Magnetic Resonance Angiography on the Diagnosis, Management and Follow-up of Cerebrovasular Disorders" by Fady T Charbel, MD; Syed G. Husain, MD; Meide Zhao, PhD; William Hoffman, Phd; and Kern Guppy, MD, PhD.