S81
Optimizing a Motion Tracking Marker for Pediatric Patients
Kristina Mary Pelkola1,2, Onur Afacan1,2, Tess E. Wallace1,2, Pauline Connaughton1, Jenna McKay1, Joseph Zmuda1, Camilo Jaimes1, and Simon K. Warfield1,2
1Radiology, Boston Children's Hospital, Boston, MA, United States, 2Computational Radiology Laboratory, Boston Children's Hospital, Boston, MA, United States
Magnetic Resonance Imaging (MRI) can be challenging for pediatric patients due to factors such as the large tunnel, imaging coil, and loud gradient noises. This can spark anxiety and fear causing them to be uncooperative and unable to hold still [1,2]. Due to these barriers, pediatric MRI exams can be plagued with motion artifacts which result in poor diagnostic quality of the images and make it challenging for Radiologists to interpret [3]. It is a common practice to administer sedation or anesthesia to attempt to acquire diagnostic images of pediatric patients. These methods are not only costly and potentially harmful, but do not eliminate motion artifacts [4]. Exams performed under sedation and anesthesia can still be affected from breathing and/or uncontrollable muscle spasms. There is an unmet need for alternative methods to enable diagnostic imaging exams in the presence of motion.  
Figure 2: Adult volunteer displaying the double winged marker, on the left, and the single flat marker, on the right in a Siemens 64-channel head coil [7].