Time-resolved projection angiography after bolus injection of contrast agent
| Autor: | Klaus Scheffler, Jörg Laubenberger, Jürgen Hennig, Ralf Strecker |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Lung Diseases
Materials science medicine.diagnostic_test business.industry Mr angiography Contrast Media Hemodynamics High resolution Time resolution Pulmonary Artery Angiography Pulmonary angiography medicine Humans Radiology Nuclear Medicine and imaging Nuclear medicine business Perfusion Magnetic Resonance Angiography Bolus injection |
| Zdroj: | Magnetic Resonance in Medicine |
| Popis: | A method for MR angiography after bolus injection of a normal dose (0.1 mmol/kg) of contrast agent is presented. Projection angiograms are acquired with a non-slice selective Snapshot FLASH sequence with a time resolution of 1 s per image or better. Typically 40 to 60 images are acquired consecutively after bolus injection of a contrast agent. The signal from vessels can be separated from background by postprocessing based on the observed temporal evolution of the signal intensities during bolus passage. The subsecond projection MR-DSA is a reliable and robust technique to produce high resolution anatomical images of the vascular system avoiding the necessity of exact timing of the contrast agent bolus. It also supplies functional information about the hemodynamics in the observed region including perfusion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|