Objective: To observe the effect of whole-body vibration therapy on the lower extremity the motor function of children with spastic diplegia. Methods: Fifty-six children with spastic diplegia were randomly divided into a treatment group and a control group, each of 28. Both groups were given routine rehabilitation exercise training, while the treatment group was additionally provided with 15 minutes of whole-body vibration therapy every day, 5 days a week for 12 weeks. Their GMFM-88 D (standing) and E (walking and jumping) scores were recorded before and after the treatment along with the active and passive range of motion of the ankle in dorsiflexion, and the root mean square surface electromyogram signals from the tibialis anterior and gastrocnemius muscles. Berg balance scale scores were also assigned before and after the treatment for both groups. Results: There were no significant differences between the two groups before the treatment. Afterward all of the evaluations except the signals from the tibialis anterior muscle in active ankle dorsiflexion had improved significantly. The improvements were all significantly better in the treatment group. Conclusion Whole-body vibration therapy can effectively improve the lower extremity motor function of children with spastic diplegia.

Objective:To compare magnetic resonance imaging (MRI)-based and computed tomography (CT)-based target volume delineation and dose coverage in partial breast irradiation (PBI) for patients with breast cancer, aiming to explore the application value of MRI localization in PBI after breast-conserving surgery.Methods:Twenty-nine patients with early breast cancer underwent simulating CT and MRI scans in a supine position. The cavity visualization score (CVS) of tumor bed (TB) was evaluated. The TB, clinical target volume (CTV), planning target volume (PTV) were delineated on CT and MRI images, and then statistically compared. Conformity indices (CI) between CT- and MRI-defined target volumes were calculated. PBI treatment plan of 40 Gy in 10 fractions was designed based on PTV-CT, and the dose coverage for PTV-MRI was evaluated.Results:The CVS on CT and MRI images was 2.97±1.40 vs. 3.10±1.40( P=0.408). The volumes of TB, CTV, PTV on MRI were significantly larger than those on CT, (24.48±16.60) cm 3vs. (38.00±19.77) cm 3, (126.76±56.81) cm 3vs. (168.42±70.54) cm 3, (216.63±81.99) cm 3vs. (279.24±101.55) cm 3, respectively, whereas the increasing percentage of CTV and PTV were significantly smaller than those of TB. The CI between CT-based and MRI-based TB, CTV, PTV were 0.43±0.13, 0.66±0.11, 0.70±0.09( P<0.001), respectively. The median percentage of PTV-MRI receiving 40 Gy dose was 81.9%(62.3% to 92.4%), significantly lower than 95.6%(95.0%~97.5%) of PTV-CT. Conclusions:The CVS between CT and MRI is not significantly different, but the MRI-based TB, CTV, PTV are significantly larger than CT-based values. The PTV-MRI is of underdose if PBI treatment plan is designed for PTV-CT. As a supplement of CT scan, MRI can enhance the accuracy of TB delineation after breast-onserving surgery.