Abstract: Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.

Abstract: A system provides automatic mode detection and scaler control in a display device which is digitally coupled to a display controller. The display controller has a variable active horizontal resolution and a variable active vertical resolution, while the display device has a fixed display device horizonal resolution and a fixed display device vertical resolution. The system determines the variable active horizontal and the vertical resolutions of the display controller; and scales the output of the display controller to the fixed horizontal resolution and vertical resolution of the display device.

Abstract: A system selects either a first scaler in a host computer or a second scaler in a display device, the first scaler having a predetermined output quality. The system instructs the display device to render a pattern; determines the output quality of the second scaler; and compares the quality of the second scaler with the predetermined output quality and selects the scaler with higher quality.

Abstract: A system positions an image with a plurality of lines on a display device. The system determines the number of black lines required to vertically center the image in a frame of the display device as m+n; displays m black lines using a first horizontal sync period at the start of each frame, the first horizontal sync period being less than the horizontal sync period of the display device; displays each line of the image; and displays n black lines using the second horizontal sync period until the end of the frame.