What question did this study set out to answer?

To develop and validate a rapid volumetric active radiofrequency field (B1+) mapping method that operates independently of T1 relaxation time for high-field MRI.

May 8, 2006Magnetic Resonance in MedicineOpen Access

Saturated double‐angle method for rapid B1+ mapping

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Authors

CCCharles H. CunninghamSunnybrook Health Science Centre JPJohn M. PaulyCardiac Imaging KNKrishna S. NayakCardiac Imaging

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Implication

Methodological study demonstrates rapid B1+ field mapping in healthy human volunteers, indicating feasibility for single-breath-hold cardiac and abdominal MRI.

Key Points

To develop and validate a rapid volumetric active radiofrequency field (B1+) mapping method that operates independently of T1 relaxation time for high-field MRI.
Combined the double-angle method with a B1-insensitive magnetization-reset sequence and a multislice segmented spiral readout.
Evaluated mapping accuracy and signal-to-noise ratio across varying repetition times (TR << T1) using phantom models.
Tested in vivo volumetric mapping in the abdomen and chest of healthy volunteers at 1.5 T and 3 T during single breath-holds.
Phantom experiments verified accurate B1+ magnitude estimation even when TR was substantially shorter than T1, with lower SNR as the primary trade-off.
In vivo chest and abdominal B1+ maps were successfully acquired within a single breath-hold.
Human cardiac evaluations achieved whole-heart volumetric coverage during a single 16-second breath-hold.

Cite This Study

Cunningham et al. (2006) studied this question.

synapsesocial.com/papers/69df47424fb243fc8e591dbc https://doi.org/10.1002/mrm.20896

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Implication

Methodological study demonstrates rapid B1+ field mapping in healthy human volunteers, indicating feasibility for single-breath-hold cardiac and abdominal MRI.

Saturated double‐angle method for rapid B1+ mapping

Discussion

Member takes

Implication

Key Points

Cite This Study

Saturated double‐angle method for rapid B1+ mapping

Discussion

Member takes

Implication

Key Points

Cite This Study

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