Contour shuttle1/1/2024 ![]() Each participant assessed each device during the real-time daily imaging interpretation of mag- netic resonance, computed tomography, and general X-ray studies over a two-week period and completed a detailed questionnaire on the ease of use, compar- ative utility as an alternative device to mouse and QWERTY keyboard, efficiency, workflow, and the ease of customized programming. 13 required six radiologists to evaluate six alternative user interface devices (UIDs), including five-button and eight- button mice, a gyroscopic mouse, a multimedia (a jog and shuttle) controller, a handheld mouse-and- keyboard combination device, and a gaming joy- stick. We were interested to see how using the inner jog wheel alone would be useful for scrolling in radiology tasks. Their results also showed that there was little overshoot with the jog-shuttle wheel. They learnt that this was effective, particularly when the outer shuttle wheel with a fast scroll was used with the inner jog wheel performing a finer scroll. used a ShuttlePro jog-shuttle wheel by Contour Design in a hybrid mode, where they mapped the displacement of the outer shuttle wheel (in terms of its rotation from 0°) to control the rate of fast scrolling, and the jog wheel for fine adjustments. Its poor performance was hypothesised to be because users have to make large re- petitive motions to traverse large numbers of slices the authors speculate that it is possible that a different interaction technique which did not require the button might improve the ratings of the trackball. The trackball used in the study required subjects to hold down a button while rotating the ball. Results showed that the trackball was signif- icantly slower and least preferred than the other methods, but there was no significant difference among the other methods. Each subject (four radiologists) looked for artificial targets in five different large CT data sets each data set was viewed using a different interaction technique. The outer ring or ‘ shuttle ’ is rubberized and spring-loaded. Jog-shuttle wheels have two rings (see Figure 1): the inner ring or ‘ jog ’ rotates through 360 degrees and provides precision frame by frame control. compare four devices: a trackball, a tablet with two different software interface designs, a jog-shuttle wheel made by Contour Design, and a mouse. ![]() One study reports the use of alternative interaction devices for navigating through large CT data sets 12. However, despite the many stack-based viewers in use today, there has been very little research on the design of interaction techniques for stack mode viewers. So, although there are some efforts to develop 3D viewers for medical data, the vast majority of volumetric medical data is viewed as stacks of 2D slices. Their focus was the display method they used the same customized programmable keypad for navigation in every condition. They also observed differences in navigation patterns between the slice- by-slice and the stereoscopic displays. They found that the stereoscopic display provided higher detection and classification performance with less interpretation time but the differences were not statistically significant in their study of eight radiologists viewing a total of 91 anomalies. 11 compared three display techniques: a stereoscopic display, slice-by-slice, and maximum intensity projections (MIP), for detecting lung nodules from CT lung volumes. However, once the appropriate viewing orientation has been chosen from the 3D image, navigation through the set of 2D slices still requires the mouse to be used in regular 2D mode. Prototypes of this system have been judged to be useful by radiologists. The 3D mouse is built by using a standard mouse and an electromagnetic motion-tracking sensor. to provide rotational degrees of freedom.
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