Effect of radiation dose level on the detectability of pulmonary nodules in chest tomosynthesis.

Objective: To investigate the detectability of pulmonary nodules in chest tomosynthesis at reduced radiation dose levels.

Methods: Eighty-six patients were included in the study and were examined with tomosynthesis and computed tomography (CT). Artificial noise was added to simulate that the tomosynthesis images were acquired at dose levels corresponding to 12, 32, and 70% of the default setting effective dose (0.

Pulmonary nodule size evaluation with chest tomosynthesis.

Purpose: To evaluate intra- and interobserver variability, as well as agreement for nodule size measurements on chest tomosynthesis and computed tomographic (CT) images.

Materials And Methods: The Regional Ethical Review Board approved this study, and all participants gave written informed consent. Thirty-six segmented nodules in 20 patients were included in the study.

Survey update on implementation, indications, and technical performance of computed tomography colonography in Sweden.

Background: Computed tomographic colonography (CTC) has gained increased acceptance in the last few years as a valid substitute for double-contrast barium enema (DCBE). However, implementation of new technologies is complex, since several factors may influence the process.

Purpose: To evaluate the current situation in Sweden concerning implementation of CTC, as compared to a previous national survey in 2005.

Evaluation of image quality and lesion perception by human readers on 3D CT colonography: comparison of standard and low radiation dose.

Aims: We compared the prevalence of noise-related artefacts and lesion perception on three-dimensional (3D) CT colonography (CTC) at standard and low radiation doses.

Methods: Forty-eight patients underwent CTC (64 x 0.625 mm collimation; tube rotation time 0.