Other

Compass International Incorporated

Patrick J Kelly

Stephan J Goerss

A tethered-ball training device used for repetitive training exercises in a variety of sports. The tethered-ball trainer has a ball support means, a retraction means, and a ball. The retraction means is mounted on the support and the tether connects the retraction means to the ball. The retraction means, or tether-rewinding device, allows the tether to feed-out when a force is applied to the ball and provides for a controlled retraction when the force is removed. In alternate embodiments, the retraction means is a spring-wound cord reel and either one or more may be used. Various embodiments include one or multiple-tether devices, a sensor for determining the boundaries of ball travel and speed, completely collapsible support means, and length adjustment means for the support means.

Tethered-ball training device

The present invention enables stereotactic surgery with a minimal structure present in order to facilitate surgery yet with enhanced accuracy in stereotactic imaging assistance to the surgeon. This device and method is known as 'frameless' stereotaxis system, and uses coordinate referencing between the CT or MRI scans and a stereotactic referencing system which uses an electromagnetically driven system to determine the location of a stylus.

Magnetic field digitizer for stereotatic surgery

The present invention enables stereotactic surgery with a minimal structure present in order to facilitate surgery yet with enhanced accuracy in stereotactic imaging assistance to the surgeon. This device and method is known as 'frameless' stereotaxis system, and uses coordinate referencing between the CT or MRI scans and a stereotactic referencing system which uses an electromagnetically driven system (transmitter and receiver) to determine the location of a stylus. Magnetic field distortion is reduced through the use of a low frequency magnetic field. The frame of reference through which this system operates is coordinate referenced to the coordinates of a composite image formed from a CT, MRI, or other system which are arranged and may be generated in two or three dimensional fashion in response to the position of a pointer as they are referenced to the orientation of a patient during an operation. In the present device and method, registration of the scan images illustrating the lesion, with the physical position of the patient is performed by first synchronizing to two coordinate systems, which can be performed in several ways, including the calibration of the stylus to several landmarks on the patient's anatomy.

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Rochester, MN, United States of America

Patrick J Kelly