Duke University researchers introduced a new MR approach at the SCMR meeting that produces cine angiograms analogous to cardiac catheterization without radiation or a contrast agent.
Duke University researchers introduced a new MR approach at the SCMR meeting that produces cine angiograms analogous to cardiac catheterization without radiation or a contrast agent.
The technique developed by Wolfgang G. Rehwald, Ph.D., a senior scientist with Siemens Medical Solutions, captures blood flow information that escapes detection with conventional MR angiography. In a representative 2D blood flow study of a pulmonary artery in canine subjects, blood was shown filling the pulmonary tree for 11 cm. Branch vessels as small as 1.5 mm in diameter were depicted. Rehwald also displayed in vivo examples of the near-real-time sequence in cine images of the human aorta and internal carotid and renal arteries.
The T1-weighted MR pulse sequence exploits a condition called global coherent free precession to create the real-time images, Rehwald said. While in a GCFP state, protons produce a continuous radio-frequency signal even in the absence of RF excitation. The condition creates a steady stream of coherently excited blood that freely precesses as it flows through anatomy that is not affected by the ongoing excitation.
New Literature Review Assesses Merits of Cardiac MRI After Survival of Sudden Cardiac Arrest
April 19th 2024While noting inconsistencies with the diagnostic yield of cardiac MRI in patients who survived sudden cardiac arrest, researchers cited unique advantages in characterizing ischemic cardiomyopathy (ICM) and facilitating alternate diagnoses.
FDA Clears Remote Scanning Support Platform for MRI, CT and PET/CT
March 25th 2024The multimodality system nCommand Lite reportedly facilitates real-time remote imaging guidance on scanning parameters and procedure assessments to licensed technologists for a variety of imaging modalities including CT and MRI.