NorthShore University HealthSystem Research Institute;Siemens Medical Solutions USA, Inc.
发明人:
Shivraman Giri,Robert R. Edelman
申请号：
US14927655
公开号：
US20170119259A1
申请日:
2015.10.30
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A method for dual-contrast unenhanced magnetic resonance angiography includes iteratively acquiring flow-dependent slices and flow-independent slices in a region. Each iteration of the acquisition process comprises identifying a flow-dependent slice location within the region and identifying a flow-independent slice location upstream from the flow-dependent slice location according to blood flow in the region. Each iteration further includes applying a first radio frequency (RF) saturation pulse to the region such that MR signals from veins in the region are substantially suppressed, and applying a second RF saturation pulse to the flow-dependent slice location such that MR signals from background muscle and arterial blood in the region are substantially suppressed. A flow independent slice is acquired at the flow-independent slice location after the second RF saturation pulse is applied and before unsaturated arterial blood has maximally flowed into the region. After acquiring the flow-independent slice, a flow-dependent slice is acquired.
