temporal bone chondroblastoma is an extremely rare benign bone tumor. we encountered two cases showing similar imaging findings on computed tomography (ct), magnetic resonance imaging (mri), and dual-time-point 18f-fluorodeoxyglucose (18f-fdg) positron emission tomography (pet)/ct. in both cases, ct images revealed temporal bone defects and sclerotic changes around the tumor. most parts of the ...

Dual-energy computed tomography (DECT) is of great significance for clinical practice due to its huge potential provide material-specific information. However, DECT scanners are usually more expensive than standard single-energy CT (SECT) and thus less accessible undeveloped regions. In this paper, we show that the energy-domain correlation anatomical consistency between images can be harnessed...

Because of the different attenuations of tissues at different energy levels, dual-energy CT offers tissue differentiation and characterization, reduction of artifacts, and remodeling of contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR), hereby creating new opportunities and insights in CT imaging. The applications for dual-energy imaging in neuroradiology are various and still expan...

We introduce a value-based noise reduction method for Dual-Energy CT applications. It is based on joint intensity statistics estimated from high- and low-energy CT scans of the identical anatomy in order to reduce the noise level in both scans. For a given pair of measurement values, a local gradient ascension algorithm in the probability space is used to provide a noise reduced estimate. As a ...

C omputed tomography (CT) has evolved into a powerful diagnostic tool, and since the advent of 64-detector row scanners, it has been demonstrated as a promising noninvasive method for coronary artery stenosis imaging (1). Although the basic physical principle of CT is unidimensional, a function of x-ray attenuation detected from multiple orientations around the imaged object, exciting new techn...