{"denoms":[{"counts":[{"groupId":"OG000","value":"0"},{"groupId":"OG001","value":"0"},{"groupId":"OG002","value":"0"}],"units":"Participants"}],"groups":[{"description":"Patients are first set up for treatment with surface fiducial marks and followed by an automated image guided alignment procedure to achieve better alignment with the planning image. The automated procedure OBI gives two shifts: vertical and lateral. In the absence of a gold standard, our goal is to compare the vertical and lateral shifts recommended by each pair of automated procedures.","id":"OG000","title":"Orthogonal Varian kV OBI Image"},{"description":"Patients are first set up for treatment with surface fiducial marks and followed by an automated image guided alignment procedure to achieve better alignment with the planning image. The automated procedure CBCT gives two shifts: vertical and lateral. In the absence of a gold standard, our goal is to compare the vertical and lateral shifts recommended by each pair of automated procedures.","id":"OG001","title":"Varian CBCT (Cone Beam CT) Imaging"},{"description":"Patients are first set up for treatment with surface fiducial marks and followed by an automated image guided alignment procedure to achieve better alignment with the planning image. The automated procedure ExacTrac gives two shifts: vertical and lateral. In the absence of a gold standard, our goal is to compare the vertical and lateral shifts recommended by each pair of automated procedures.","id":"OG002","title":"Oblique Brainlab ExacTrac Images"}],"populationDescription":"No data analyzed due to staff leaving primary institution.","reportingStatus":"POSTED","timeFrame":"Up to 7 weeks","title":"Dose Variation Between the Different Imaging Technologies for Normal Tissue Structures of 10%","type":"PRIMARY"}