At the time this editorial was written, an extremely interesting loop was closing! Indeed, this text was written last after the invitation received in October 2012 and the proposal submitted in August 2013 for a Frontiers in Plant Science research topic (specialty: Plant Biophysics and Modeling) on " plant CT scanning, " the preliminary submission of abstracts in December 2013 and the seven pee...

BACKGROUND Accurate staging of malignant tumors in the liver has major implications in defining prognosis and guiding both surgical and nonsurgical therapy. Intraoperative ultrasound in open surgery compares favorably with computed tomography (CT) in the detection of liver tumors; however, there is little experience with laparoscopic ultrasound (LUS). HYPOTHESIS Laparoscopic ultrasound is mor...

Over 100-million of x-ray CT scans are performed worldwide each year. In most cases, a scan projection or sonogram data are discarded after images are read. This represents a huge waste of big data, and an opportunity to develop new methods for better image reconstruction and high dose efficiency. Here we present an initial attempt to archive, utilize and share big data from CT scanning. In thi...

Diagnosing pulmonary embolism is problematic since clinical signs and symptoms of PE are aspecific. Diagnostic algorithms have been developed to rationalize the use of imaging tests in patients with a clinical suspicion of PE. An algorithm based on helical CT has gained widespread interest due to the availability of helical CT. However, these algorithms have often been implemented without appro...

PURPOSE To compare prospectively the accuracy of spiral computed tomography (CT) with that of ventilation-perfusion scintigraphy for diagnosing pulmonary embolism. MATERIALS AND METHODS Within 48 hours of presentation, 142 patients suspected of having pulmonary embolism underwent spiral CT, scintigraphy, and (when indicated) pulmonary angiography. Pulmonary angiography was attempted if interp...

PURPOSE Four-dimensional computed tomography (4D CT) can provide patient-specific motion information for radiotherapy planning and delivery. Motion estimation in 4D CT is challenging due to the reduced image quality and the presence of artifacts. We aim to improve the robustness of deformable registration applied to respiratory-correlated imaging of the lungs, by using a global problem formulat...

This letter updates the April 2016 case report about an 81-year-old patient who was in the final stages of advanced Alzheimer disease (AD) in hospice care. A neuropsychologist examined her on May 21, 2015, and concluded that she was “completely nonresponsive.” Following treatment by 4 computed tomography (CT) scans of the brain from July to August 2015, the patient made a remarkable recovery. A...

OBJECTIVE To study the feasibility and the potential benefits of defining the internal gross tumor volume (IGTV) of hepatocellular carcinoma (HCC) using contrast-enhanced 4D CT images obtained by combining arterial-phase (AP) contrast-enhanced (CE) 3D CT and non-contrast-enhanced (NCE) 4D CT images using deformable registration (DR). METHODS Ten HCC patients who had received radiotherapy befo...

OBJECTIVE Our aim was to determine portable abdominal CT image quality and clinical content in a consecutive series of scans obtained in ICUs at a single center. MATERIALS AND METHODS All helical portable abdominal CT scans obtained between June 1999 and December 2000 were reviewed by two observers. Image quality was assessed for feature detection and overall quality compared with the patient...

In recent years, use of computed tomography (CT) has increased dramatically. Increased dose from radiography, and CT in particular, has led many physicians and patients to question the cancer risks and overall safety of modern imaging. It is essential for radiologic technologists to be properly trained and certified in CT and to understand technical factors and how they are related to radiation...