Contributing Editor Greg Freiherr offers an overview of computed tomography (CT) advances at the Radiological Society of North America (RSNA) 2015. The video includes Freiherr during his booth tours with some of the key vendors who were featuring new technology.
Computed Tomography (CT)
(A) 70-year-old woman with pulmonary adenocarcinoma who underwent sublobar resection without evidence for pLVI. 15-mm solid nodule with irregular margins present in right lower lobe (arrow). No tumor recurrence on 37-month follow-up. (B) 75-year-old man with pulmonary adenocarcinoma who underwent wedge resection that exhibited pLVI. 19-mm solid nodule with irregular margins and peritumoral interstitial thickening (arrowheads) present in right upper lobe. Ipsilateral mediastinal and hilar lymph node metastasis occurred after 5-month follow-up (not shown). Image courtesy of the American Roentgen Ray Society (ARRS), American Journal of Roentgenology (AJR)
Spectral DLR enables improved assessment of lumen stenosis in the presence of calcified plaque. Interactive monochromatic image display enables improved opacification of the injected contrast with low keV images and reduced calcium blooming artifacts with high keV images. The range of monochromatic energy levels (35-135 keV) can be visualized in real time through an image slider in the application that can be integrated in to a PACS.
Axial chest CT examination in a 54-year-old participant. A, On the axial noncontrast chest CT image, the pectoralis muscle (PM) area was segmented and measured in the section above the aortic arch. B, The subcutaneous adipose tissue (SAT) area as the area between the PM and the skin surface on the same section was also measured and the attenuation of pixels in the SAT area was used to determine the individualized threshold for the intermuscular adipose tissue (IMAT). C, The IMAT within the PM was segmented as the areas with Hounsfield units below this threshold for the IMAT (arrowheads). Image courtesy of the Radiological Society of North America