Incorporation of local dependent reliability information into the Prior Image Constrained Compressed Sensing (PICCS) reconstruction algorithm.

Purpose: The reduction of dose in cone beam computer tomography (CBCT) arises from the decrease of the tube current for each projection as well as from the reduction of the number of projections. In order to maintain good image quality, sophisticated image reconstruction techniques are required. The Prior Image Constrained Compressed Sensing (PICCS) incorporates prior images into the reconstruction algorithm and outperforms the widespread used Feldkamp-Davis-Kress-algorithm (FDK) when the number of projections is reduced.

Conformal breast irradiation with the arm of the affected side parallel to the body.

Purpose: To propose a simple, forward-planned three-dimensional conformal radiotherapy (3D-CRT) technique for breast cancer patients with frozen shoulder.

Materials And Methods: A technique is described that avoids lateral beams transmitting through the arm of the affected side. One medial, tangentially applied beam deposits most of the dose.

Influence of dental materials on dental MRI.

Objectives: To investigate the potential influence of standard dental materials on dental MRI (dMRI) by estimating the magnetic susceptibility with the help of the MRI-based geometric distortion method and to classify the materials from the standpoint of dMRI.

Methods: A series of standard dental materials was studied on a 1.5 T MRI system using spin echo and gradient echo pulse sequences and their magnetic susceptibility was estimated using the geometric method.