CONTEXT Computed tomography (CT) exams are increasingly common and account for a significant portion of individuals' mounting exposure to medical radiation. OBJECTIVE To explore issues surrounding patient radiation dose, including techniques for minimizing dose and the feasibility of tracking lifetime exposure to medical radiation from CT and other imaging exams. METHODS The authors conduct...

Here, we describe a patient with a history of colorectal cancer in whom 2-[18F]fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography ([18F]FDG PET/CT) was performed for the evaluation of response to therapy. [18F]FDG PET/CT showed a small residual disease in the rectum. In addition, multiple metabolically inactive soft tissue densities were d...

OBJECTIVE To evaluate image quality of female pelvic computed tomography (CT) scans reconstructed with the adaptive statistical iterative reconstruction (ASIR) technique combined with low tube-voltage and to explore the feasibility of its clinical application. MATERIALS AND METHODS Ninety-four patients were divided into two groups. The study group used 100 kVp, and images were reconstructed w...

AIM To investigate the potential of reducing the radiation dose in prospectively electrocardiogram-triggered coronary computed tomography angiography (CCTA) while maintaining diagnostic image quality using an iterative reconstruction technique (IRT). METHODS AND MATERIALS Prospectively-gated CCTA were first performed on a phantom using 256-slice multi-detector CT scanner at 120 kVp, with the ...

cardiovascular disease remains the principal cause of death in the modernized world.   several novel noninvasive imaging techniques have been recently developed to improve diagnosis of cardiac and coronary disease.   of these advances, multidetector computed tomographic (mdct) angiography has evolved most dramatically to transform computed tomography from a single-slice trans-axial modality to ...

On day 5, after right upper lobectomy, the patient developed headache, confusion and right hemiparesis and there was clear fluid drainage from the chest tube. Computed tomography (CT) scan of the head showed gas in the ventricles and subarachnoid space. The fluid from the drain was positive for Beta-2 transferrin signifying cerebrospinal fluid (CSF) fistula. Patient recovered completely with co...

An 18-year-old man presented with altered mental status. He was found to have diabetic ketoacidosis. Chest X-ray showed pneumomediastinum. After intubation for air-way protection, an oral-gastric tube was placed. A chest computed tomography scan showed the tip of the oral-gastric tube to be in the right hemithorax. The patient underwent a thoracotomy and was managed in the intensive care unit. ...

A 74-year old patient developed severe aortic valve regurgitation 11 years following root replacement using a stentless Shelhigh tube-graft. Computed tomography scan showed a heavily calcified aortic conduit (Fig. 1), although the company claims that detoxification process eliminates residual glutaraldehyde and ensures less calcification in the long term. The patient underwent successful transa...