Table 2.

Q measurements for elements of the developed dual-nuclei array.

Coil	Environment	Qunloaded	Qloaded	Coil Noise (%)
Sodium receive coil	1	330	105	17
Sodium receive coil	2	260	85	18
Sodium receive coil	3	190	70	21
Sodium receive coil	4	180	70	22
Sodium birdcage	1*	220	40	10
Sodium birdcage	1	130	50	22
Sodium birdcage	4	110	55	29
Proton coil	1	210	140	42
Proton coil	4	205	155	51

All Q measurements were made after minor capacitive adjustments (less than 10% for the sodium birdcage, and less than 5% for the sodium array and proton array) to compensate for shielding during integration of the three modules such that all sodium coils were tuned to 78.6 MHz and proton coils were tuned to 297.2 MHz.

^*indicates that measurements were made before detuning diodes and RF chokes were added to the birdcage.