The present invention relates to a head restraint kit for use with a medical head device for immobilizing the head of a patient in medical research, diagnosis and operation. The head restraint kit is particularly suitable for use with a head coil for magnetic resonance imaging. The head restraint kit contains a head rest pillow for providing support to the head of a patient, a neck cushion for providing neck support, and one or more wedge cushions for providing further support for the head. The head restraint kit may also contain one or more compact square cushions which can be inserted into a space between the head and the medical head device for additional head support. The head restraint kit may further contain a cloth strap placed over the forehead of a patient for protecting and securing the head against movement.