Patient motion image artifacts can be minimized and re-exposure avoided by selective removal of a sequence of basis images from cone beam computed tomography datasets: A case series

Publication date: Available online 15 July 2019Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral RadiologyAuthor(s): Andy Wai Kan Yeung, Bruno Azevedo, William C. Scarfe, Michael M. BornsteinAbstractThis case series describes a reconstruction method applied to a cone beam computed tomography (CBCT) projection dataset that uses selected basis projection images to improve diagnostic image quality for patients who moved during radiographic procedure. Reconstructed volumetric data from six patients at two institutions initially exhibited characteristic double contour images due to motion artifacts. For each case, the CBCT basis images from the entire projection dataset were displayed as a cine sequence, and patient movement was identified during the first or last 90-degrees of a full 3600 acquisition trajectory. Employing a useful reconstruction function of proprietary software, a secondary reconstruction was performed by discarding data acquired during the first and last 90-degrees of rotation. For all cases, this method provided a volumetric dataset without motion artifact. General practitioners can apply this clinical method, whenever appropriate, to avoid a re-scan and keep patient exposure “as low as diagnostically acceptable”.

Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology - July 16, 2019 Category: ENT & OMF Source Type: research