Abstract: Creating and executing real-time psychological experiments with sub-millisecond time precision uses a Hierarchical Experiment Spreadsheet (HES) providing a hierarchical data structure and interface. The user adds/modifies experiment levels in a spreadsheet multilevel table representation. New objects and properties are added while maintaining the hierarchical structure of the experiment and prohibiting user corruption of the experiments hierarchical structure. A Time Event Queue Manager (TEQM) provides precision timing using event pre-release synchronization, compensating for timing errors produced by the personal computer operating system and enabling sub-millisecond time precision.

Abstract: Critical needs for MRI patient instruction, testing, comfort, motion control, and speech communication are provided for better imaging which leads to more effective medical care. An MRI Digital Video Projection System is disclosed which provides better quality display to the patient to better inform, instruct, test, and comfort the patient plus the potential to stimulate the brain with microsecond onset times to better diagnose brain function. An MRI Motion Tracker and Patient Augmented Visual Feedback System enables monitoring patient body part motion, providing real time feedback to the patient and/or technician to substantially improve diagnostic yield of scanning sessions, particularly for children and mentally challenged individuals. An MR Forward Predictive Noise Canceling Microphone System removes the intense MRI acoustic noise improving patient communication, patient safety and enabling coding of speech output. These systems can be used individually but maximum benefit is from providing all three.