Purpose/ Objective
Volumetric imaging of the whole heart and the great vessels is very important for surgical planning and clinical decision making, particularly in complex congenital heart diseases. However, volumetric imaging is challenging due to presence of respiratory and cardiac motion. Gadolinium contrast injection is still a concern for patients with severe renal impairment and contrast allergy, as well as the need for intravenous cannulation. With use of a navigator 3D SSFP sequence, volumetric bright blood imaging can be achieved without the need for contrast injection. However, this sequence is still limited by the intrinsic limitations of SSFP sequences (e.g. presence of dephasing artifacts in regions with turbulence) and the need for additional scanning time due to dual gating. Volumetric imaging of the whole heart and the great vessels is very important for surgical planning and clinical decision making, particularly in complex congenital heart diseases. However, as the heart is beating and the diaphragms are moving, respiratory and ECG navigation must be performed to minimize motion artifacts. With use of a balanced SSFP sequence, bright blood imaging can be achieved without the need for contrast injection.
Planners
Kenneth Cheung and Christopher Lam
Disclosure of Commercial Support
SCMR received no funding to support this activity.
Bibliography
Uribe S, Tangchaoren T, Parish V, Wolf I, Razavi R, Greil G, Schaeffter T. Volumetric cardiac quantification by using 3D dual-phase whole-heart MR imaging. Radiology. 2008 Aug;248(2):606-14. SCMR Standardized Imaging Protocols 2020 Update Kramer CM, Barkhausen J, Bucciarelli-Ducci C, Flamm SD, Kim RJ, Nagel E. Standardized cardiovascular magnetic resonance imaging (CMR) protocols: 2020 update. J Cardiovasc Magn Reson. 2020 Feb 24;22(1):17.
- Understand the underlying technical principles of the sequence.
- Understand the usual technical parameters used and the background principles.
- Understand the limitations of the sequence.
- Understand the common applications.