Optimization of Cardiac-MR Protocols
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|ClinicalTrials.gov Identifier: NCT00557869|
Recruitment Status : Completed
First Posted : November 14, 2007
Last Update Posted : December 20, 2011
|Condition or disease|
|Sequence Optimization Protocol Optimization Normal Values Feasibility|
Time optimized and well organized MR protocols for the cardiac and lung investigations are evaluated on normal subjects with special respect to following topics:
- Localization: Definition of standardized anatomic imaging planes with special respect to the right ventricle.
- Morphological imaging: Optimization of spin-echo and gradient-echo sequences for various heart frequencies and breath-hold abilities. Investigation of the effect of various preparation pulses. Optimization of the signal-to-noise ratio for morphological cardiac imaging. Evaluation and optimization of various breathing and breath-hold (with and without navigator) ECG and pulse triggered sequences.
- Cardiac and lung function: Optimization of gradient-echo sequences for various heart frequencies and breath-hold abilities. Evaluation of pulse-triggered function analysis and optimization of free breathing protocols. Optimization of tagging techniques. Evaluation of the pulsatile flow in lung vessels. Acquisition of age depended normal data of cardiac and lung function.
- Coronary imaging: Definition of standardized anatomic imaging planes to monitor coronary arteries (single oblique, volume targeted). Optimization of acquisition window with respect to various heart frequencies. Evaluation of the influence of the position of the navigator and tracking factor on image quality. Optimization of a pulse triggered protocol. Evaluation of black-blood coronary imaging and visualization of the lumen and wall of coronary arteries.
- Phase contrast techniques: Optimization of imaging planes, time resolution and spatial resolution of flow measurements in the heart, in the vessels around the heart, lung vessels and coronary arteries. Evaluation of retrospective and prospective gating with respect to the heart frequency. Evaluation of normal values in 1-dimensional, 2-dimensional and 3-dimensional time resolved flow measurements.
- Single-Shot Imaging: Evaluation of signal intensity and stability of single shot techniques with and without preparation pulses. Optimization of real-time image acquisition.
- Parallel acquisition and breath-hold time optimization: Evaluation of impact of echo-sharing and parallel acquisition on image quality. Optimization of short-breath-hold protocols.
|Study Type :||Observational|
|Actual Enrollment :||122 participants|
|Official Title:||Optimization of Native Cardiac-MR Protocols|
|Study Start Date :||October 2002|
|Actual Primary Completion Date :||September 2011|
|Actual Study Completion Date :||September 2011|
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00557869
|Medical Unitersity Graz, Allgemeine Radiologische Diagnostik|
|Graz, Stmk, Austria, 8036|
|Principal Investigator:||Gert Reiter, DI Dr.||Siemens Medical Solutions|
|Principal Investigator:||Ursula Reiter, DI Dr.||University Hospital Graz|