TABLE 1.

MRI signal intensity (SI) obtained from the lumbar enlargement.

	Group C (n = 5)	Group PDN (n = 5)	Group BHB (n = 5)	p-value
Pre-injection	100.00 ± 14.99	118.19 ± 25.45	116.97 ± 19.76	0.327
PEAK SI	186.59 ± 32.88	198.71 ± 30.74	201.13 ± 33.92	0.772
SIX SI	142.68 ± 37.37	166.81 ± 32.20	162.09 ± 33.42	0.488
SIPH	10.26 ± 2.44	6.99 ± 0.61*	10.00 ± 0.74#	0.009
PEAK TIME	1.90 ± 0.82	1.90 ± 0.65	2.00 ± 0.50	0.964

Group C: Rats intraperitoneally injected with sterile saline and phosphate-buffered saline. Group PDN: Rats intraperitoneally injected with streptozotocin and phosphate-buffered saline. Group BHB: Rats intraperitoneally injected with streptozotocin and β-Hydroxybutyrate. Pre-injection: the SI before Gadolinium-diethylenetriamine Penta-acetic acid (Gd-DTPA) injection. PEAK SI: the peak of SI. SIX SI: the SI 6 h after finishing the Gd-DTPA injection. SIPH: the variation of the SI per hour after SI reached its peak. PEAK TIME: the time to reach PEAK SI.

*p < 0.05 compared with values in Group C.

^#p < 0.05 compared with values in Group PDN.