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ACR/NEMA An image file format.
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Analyze
An image file format.
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DICOM
An image file format.
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Frameless Stereotaxy Frameless stereotaxy refers to the act of monitoring the position and orientation of task specific tool, and displaying representations of these tools on diagnostic images of a subject or patient. This allows the operator to monitor the position of the tool with respect to the subject's anatomy displayed in the image area.
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FTP A nearly universal protocol for transferring computer files from one machine to another.
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Image-Guided TMS The application of frameless stereotaxy for the positioning and monitoring of a TMS coil.
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MINC An image file format.
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MPR Refers to transverse (axial), coronal, or sagittal images.
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Magnetic Resonance Images acquired using a magnetic resonance scanner on a subject. Unless otherwise specified, images are assumed to be of the subject anaotmy (structural images).
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Neuronavigator Another word for a frameless stereotaxy apparatus.
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Optical Position Sensor The Polaris Position Sensor containing two infrared cameras and emitters and associated electronics. It monitors a space in front of the lenses for trackers. It is connected to a power supply and, by serial cable, to the Brainsight™ computer.
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PET (Positron Emission Tomography) Imaging modality often used to obtain functional images of the brain.
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Pointer Object tracked by the position sensor and used by the operator to identify landmarks on a subject to the computer.
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Polaris Camera See Optical Position Sensor.
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QuickTimeTM Movie file format.
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ROM file (Passive tracker description file) The Polaris camera needs to know the expected dimensions of a tracker in order for it to be able to recognize and track it. This information is kept in a description file and can be recognized by the ROM file extension. Each tracker comes with a ROM file, whose file name usually matches the serial or part number of the tracker.
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Subject A person, either a healthy, normal volunteer or a medical patient, who will undergo TMS stimulation for medical research purposes.
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TMS (Transcranial Magnetic Stimulation) Refers to the act of employing a TMS coil to induce an electrical current within a small region of the subject's cortical tissue, and induce the target neuronal synapses to fire.
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TMS Coil A device that contains electrical wires arranged in one or more loops (or coils). When connected to an appropriate driving circuit, it creates a short pulse of magnetic field. When placed over the scalp of a subject, this magnetic field induces an electric field in the brain tissue, which causes the brain synapse to fire (be stimulated).
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Tracker Using the Polaris, a tracker is an object that contains either infrared emitters (active Polaris) or reflectors (passive Polaris) in a pattern recognizable by the Polaris camera. Trackers can be attached to various tools, or tools can have trackers built into them. The reflector-based trackers have a file associated with them that describes the tracker to the Polaris (see ROM file).
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