Key result
A modified quadrupole gradient set achieved gradient field strengths up to 15.2 G/cm with field distortions less than 2% over the central 8 cm, suitable for high-resolution MRI tagging.
A custom quadrupole gradient set enables high-resolution MRI tagging of isolated canine hearts in a standard clinical 1.5 T scanner.
Advances preclinical cardiac tagging; leaves open translation to in vivo human imaging.
A special purpose gradient set with a Cos(2 theta) current distribution has been constructed for high resolution MR imaging of small samples in a clinical Signa 1.5 T scanner using the existing gradient amplifiers. The X, Y, and Z gradient coils can attain gradient field strengths of 11.3, 4.7, and 15.2 G/cm at 100 amps current, respectively, with a slew rate of 20 G/cm/ms and usable ramp time of 150 microseconds. Field distortions are less than 2% over the central 8 cm of the bore, suitable for high resolution tagging of isolated canine hearts.
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O’Dell et al. (1994) studied this question. Modified quadrupole gradient set was evaluated on Gradient field strengths and field distortions. A modified quadrupole gradient set achieved gradient field strengths up to 15.2 G/cm with field distortions less than 2% over the central 8 cm, suitable for high-resolution MRI tagging.
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