The number of reports of nanoparticle CT contrast agents has been growing swiftly over the past 5 years. These nanoparticles can be applied to produce long-lived CT contrast in the blood vessels and to perform targeted imaging, and can be used in conjunction with a new CT technique – multicolor CT. Such innovations offer the promise of new applications and diagnoses that can be performed with C...

Computed tomography (CT) is a frequently performed examination in women of all ages. In all thoracic CT examinations of the chest at least parts of the breasts are included. Therefore incidental breast pathology may be observed. It has been suggested that one out of 250 women undergoing chest CT will show a malignant incidental breast lesion. Given the high number of performed chest CT examinat...

BACKGROUND Japan has the most CT and MRI scanners per unit population in the world; however, the geographic distribution of these technologies is currently unknown. Moreover, nothing is known of the cause-effect relationship between the number of diagnostic imaging devices and their geographic distribution. METHODS Data on the number of CT, MRI and PET devices and that of their utilizations i...

A major challenge in X-ray computed tomography (CT) is reducing radiation dose while maintaining high quality of reconstructed images. To reduce the radiation dose, one can reduce the number of projection views (sparse-view CT); however, it becomes difficult to achieve high quality image reconstruction as the number of projection views decreases. Researchers have applied the concept of learning...

Abstract This paper reports the results of study 3D printing materials applied as phantom radiology, which is an imitation human body tissue for medical radiology purposes. The types were ABS, PETG, flexible TPU, Wood and PLA resin. Each them was printed using into sample 30 mm x 9 mm. samples then tested Siemens CT-Scan machine. Radiant Dicom Viewers Micro software used to process data determi...

PURPOSE To analyse and compare the costs of hepatic tumor ablation with computed tomography (CT)-guided high-dose rate brachytherapy (CT-HDRBT) and CT-guided radiofrequency ablation (CT-RFA) as two alternative minimally invasive treatment options of hepatocellular carcinoma (HCC). MATERIALS AND METHODS An activity based process model was created determining working steps and required staff of...

INTRODUCTION For accurate dose calculations, it is necessary to provide a correct relationship between the CT numbers and electron density in radiotherapy treatment planning systems (TPSs). The purpose of this study was to investigate the energy dependence of measured CT numbers on substituted materials used for CT number calibration of radiotherapy TPSs and the resulting errors in the treatmen...