Accuracy and Precision of Dual-Energy CT for Measuring Iodine Concentration: Validation in Phantom Studies
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Based on quantification of iodine within tissues, DECT may be able to estimate blood volume as a surrogate of organ perfusion at contrast enhanced CT. Read more
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Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol
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The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. Read more
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Which scanner: GE CT750 or the Siemens Flash?
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The following question has been sent by John Phillips: Which scanner: Which is the more advanced and best all around scanner….the GE CT750 or the Siemens Flash? If you could only buy one as your only scanner which would you buy? Are there any “must have” options? Savvas Nicolaou, MD, Vancouver General … Read more
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International CT image contest: highest image quality at the lowest radiation dose
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Up until February 2010 users of SOMATOM Definition, SOMATOM AS and SOMATOM Flash have the opportunity to submit their CT images to the international CT image contest. The contest aims on choosing the best CT images acquired at the lowest radiation dose. Read more
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Exclusion of urolithiasis in the presence of contrast media using dual energy
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Case history: 45-year-old female with cholangiocellular carcinoma and known peritoneal carcinosis presents for follow-up scan post surgery and post chemotherapy. Question: Can virtual non-enhanced imaging confirm the presence of a small renal stone in the lower pole of the right kidney found incidentally? Read more
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![[1] Conventional 5 mm axial image of the lower pole of the kidneys. In the right kidney, the hyperenhancing area could be a calcified nodule.](http://www.dsct.com/wp-content/uploads/2009/04/exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-11-150x150.jpg "exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-11")
![exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-2[2] High resolution coronal reconstruction displays a nodular hyperenhancing nodule.](http://www.dsct.com/wp-content/uploads/2009/04/exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-2-150x150.jpg "exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-2")
![[3] High resolution sagittal reconstruction confirms the presence of a nodular hyperenhancing nodule, making the diagnosis of a renal calculus likely.](http://www.dsct.com/wp-content/uploads/2009/04/exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-3-150x150.jpg "exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-3")
![[4] Virtual non-enhanced analysis shows that the major component of the nodular formation is iodine, which is no longer present in the virtual non-enhanced image.](http://www.dsct.com/wp-content/uploads/2009/04/exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-4-150x150.jpg "exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-4")
Dual Energy CT of peripheral arteries and Dual Energy CT Angiography of Peripheral Arterial Occlusive Disease
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Scott Schonhover, technologist, USA, has sent the following question: DE Runoffs: Is anyone doing these either as research or in a clinical setting? If so is there a protocol for scanning and/or injection? I undertand that certain body habitus patients would exceed scan FOV’s. One of our doc’s is contemplating a research study on … Read more
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Dual-energy computed tomography for the differentiation of uric acid stones: ex vivo performance evaluation
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We assessed the potential of dual-energy computed tomography (CT) for the differentiation between uric acid (UA)-containing and non-UA-containing urinary stones. Forty urinary stones of 16 different compositions in two sizes (< and >/= 5 mm) were examined in an ex vivo model. Thirty stones consisted of pure calcium oxalate (whewellite or … Read more
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