Ultrasound - MRI Fusion Guided Injections in Muscles

This study is using a new technology of combining MRI and ultrasound images to help guide the injection into the correct muscles. Combining MRI images with real-time ultrasound images is a new technology which has recently become available. Sometimes ultrasound images can be difficult to interpret, especially when there are problems with stiffness in the muscles. The MRI images create a "road-map" to help understand the ultrasound images at the time of the injection. This may help guide the injection, compared with using ultrasound alone. This technique has not currently been used in muscle injections, therefore we would like to use it as part of a research study. This study is comparing current standard practice of using ultrasound guidance alone versus ultrasound guidance with an MRI road-map to direct muscle Botox injections.