| Summary: | 碩士 === 國立成功大學 === 生物醫學工程學系 === 105 === Ultrasound has been widely used in clinical diagnosis. However, ultrasound diagnosis is a highly user-dependent modality. It requires lots of experience. Recently, the ultrasound image simulator has been developed to standardized training procedure in hospital and medical school. As operator moves the ultrasound probe on the manikin, simulator provides virtual corresponding images as the users were examining in a real environment, allowing users to improve their skill before clinical diagnosis. The quality of training depends on the accuracy of tracking device. Because a high sensitivity sensing provides a higher performance for hand-eye coordination training. Nowadays, several commercial ultrasound simulators are available based on different sensor, such as electromagnetic, optical, and inertial sensing. In present study, Apple Pencil is used for developing a tablet-base ultrasound simulator. Two built-in tilt sensors will tell the tilt angles and azimuth of the penholder when the Apple Pencil is touching the surface of the tablet. This feature is made use to track the moving action of the participants. The information of tracking parameters are packetized and transmitted to a server for calculating the corresponding image. The data-base in the present simulator applied CT transform for more widely access to training data online. The transform is based on simulation of reflection, transmission and scattering of acoustic wave. A liver CT image is used as example in the present simulator. The simulator is able to precisely show the synthesized corresponding ultrasound image and hepatic artery can be recognized on the image with different scanning angles.
Keyword: Ultrasound simulator, Apple Pencil, CT transform
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