Device Energy Source Used Primary Application X-ray machine X-rays (Electromagnetic Radiation) Bones, chest (lungs) CT scanner (Computed Tomography) X-rays (Multiple beams) Cross-sectional images of bones, soft tissues, blood vessels MRI scanner (Magnetic Resonance Imaging) Strong Magnetic Fields and Radio Waves Detailed images of soft tissues, brain, spinal cord, joints Ultrasound scanner Ultrasonic Waves (High-Frequency Sound Waves) Soft tissues, organs (abdomen, pelvis), blood flow, pregnancy imaging Based on this analysis, the device that specifically uses ultrasonic waves to create images of internal organs is the Ultrasound scanner. Therefore, among the given options, only the Ultrasound scanner utilizes ultrasonic waves for imaging internal organs.