filtered by: All Types » All Clinical Topics » All Hot Topics

Accuracy and Precision of Dual-Energy CT for Measuring Iodine Concentration: Validation in Phantom Studies

posted by U. Joseph Schoepf, M.D. | Apr 11, 2011
U. Joseph Schoepf, M.D.

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

Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol

posted by Martin Heuschmid, M.D. | Aug 24, 2010
Martin Heuschmid, M.D.

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

Which scanner: GE CT750 or the Siemens Flash?

posted by Savvas Nicolaou, M.D. | Jul 7, 2010
Savvas Nicolaou, M.D.

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

International CT image contest: highest image quality at the lowest radiation dose

posted by DSCT.com editors | Nov 6, 2009

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

Exclusion of urolithiasis in the presence of contrast media using dual energy

posted by Axel Kuettner, M.D. | Aug 28, 2009
Axel Kuettner, M.D.
  • [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.
  • exclusion-of-urolithiasis-in-the-presence-of-contrast-media-using-dual-energy-2[2] High resolution coronal reconstruction displays a nodular hyperenhancing nodule.
  • [3] High resolution sagittal reconstruction confirms the presence of a nodular hyperenhancing nodule, making the diagnosis of a renal calculus likely.
  • [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.

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

Dual Energy CT of peripheral arteries and Dual Energy CT Angiography of Peripheral Arterial Occlusive Disease

posted by Thorsten R. C. Johnson, M.D. | Feb 2, 2009
Thorsten R. C. Johnson, M.D.

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

Dual-energy computed tomography for the differentiation of uric acid stones: ex vivo performance evaluation

posted by Hatem Alkadhi, M.D. | Jan 13, 2009
Hatem Alkadhi, M.D.

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