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Pulse oximeters estimate both the heart rate and oxygen saturation accurately and are widely used in clinical applications for monitoring the patients at risk of hypoxia. The raw pulse oximeter signal namely Photoplethysmogram (PPG) usually suffers from motion artifacts (MA) corruption, due to the voluntary or involuntary movements of patient while recording the data from PPG sensor. The identification...
We develop an approximate fan-beam algorithm to reconstruct an object with time-dependent nonrigid transformation such as the heart. The method is in the form of derivative back- projection filtering with compensation of affine transformations on a local basis. Computer simulations showed the proposed method significantly reduces image artifact due to nonrigid motion. Therefore, with very little motion...
Motion artifact is a major limitation in most practical implementations of wearable health monitoring devices. Especially in applications requiring continuous monitoring and high specificity, motion artifact can render a solution infeasible in real world use cases. We believe that the single most important technical challenge that will decide the success of wearable biomedical sensor systems is signal...
Motion artifact degrades PET imaging which often leads to inaccurate quantification of radioactivity concentration. Current motion correction algorithms generally lack the ability to compensate for non-rigid motions as well as perform poorly for frequent non-cyclical motions. In this paper, we derive from first principles a general list mode reconstruction algorithm that accounts for time-varying...
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