MRI Pedia Poser Product Detail Pedia Poser offers gentle yet secure pediatric immobilization. Helps to eliminate retakes, saving time and money. Patient is secured only once and chair rotates allowing for different views. Fits all patients from infants to four year olds. Saddle seat with detachable saddle horn is form-fitting and safe. The bench seat for older children includes a detachable saddle horn to aid in positioning. In either configuration, the saddle horn supports a protective genital shield. Critical chair components are X-ray lucent. Germ-resistant, nonporous polyethylene is easy to clean. Lockable casters offer mobility and stability.