posted by Balazs Ruzsics, M.D., PhD

For decades, dual-energy imaging has been used for tissue differentiation with several x-ray–based imaging modalities, exploiting the fact that the tissues in the human body show different absorption characteristics when penetrated with different x-ray spectra, spectra that are typically generated by different kV settings of the x-ray tube. Recently, dual-source …

• color-coded iodine maps
• Coronary artery disease
• Coronary CT angiography
• dual energy
• Heart
• SPECT

posted by Sebastian Leschka, M.D.

The purpose of this study was to investigate the effect of low kilovoltage dual-source computed tomography coronary angiography (CTCA) on qualitative and quantitative image quality parameters and radiation dose.  

Dual-source CTCA with retrospective ECG gating …

• angiography
• contrast-to-noise ratio
• dual-source CT coronary
• low kilovoltage
• radiation exposure

posted by Prof. Dr. med. Thomas Albrecht, FRCR

The following question has been sent by Gabor Erfert:
Cancer: To whom it may concern, I wonder if this DSCT procedure can be applied to cancer patients in particular those suffering of a masking cancer. Thanks for your reply

Thomas Albrecht, M.D., Free University and Humboldt University of Berlin:

Dear Gabor Erfert,
a dual …

posted by Stephan Achenbach, M.D.

The following question was sent by E.I. Steenkamp, South Africa:
Can you direct me to specific articles explaining the pros (and cons) of Cardiac CT and its place in Cardiology?
Cardiac CT in general please. I also would like some specific information …

posted by Anno Graser, M. D.

Please, click on the title to see the protocol.

• dual energy
• kidney
• kidney stones
• urolithiasis

posted by Anno Graser, M. D.

History

A 34 year-old female (A) and a 55 year-old male (B) patient were both referred for MDCT evaluation of a known urinary calculi. A non-enhanced MDCT scan of the abdomen was performed on the Dual Source CT (DSCT) using spiral Dual Energy evaluation.

Diagnosis

The Dual Energy acquisition allowed not only a …

• dual energy
• kidney
• kidney stones
• urolithiasis

posted by Martin Heuschmid, M.D.

History

Following successful RFCA a 51-year-old female was presented to CT for exclusion of pulmonary vein stenosis. The patient was clinically asymptomatic.

Question

Presence of post-interventional pulmonary vein stenosis or exclusion of further complications.

Diagnosis / Differential diagnosis

• Post-procedural 70% high grade stenosis …

• cardiac
• catheter ablation
• heart
• pulmonary veins
• stenosis

posted by Thorsten R. C. Johnson, M.D.

Please, click on the title to see the protocol.

• aortic dissection
• cardiac
• chest pain
• coronary artery assessment
• coronary CT angiography
• CT angiography
• heart
• heart rate
• myocardial infarction
• pulmonary embolism

posted by Stephan Achenbach, M.D.

Please, click on the title to see the protocol.

• arrhythmia
• coronary artery assessment
• heart
• restenosis
• stenosis
• stenting

posted by Savvas Nicolaou, M.D.

The following question has been sent by Dr. Ravi Mahal, Radiologist, Boca Radiology Group, USA:
We have been using the DECT for Urinary stone composition for the past 6 months.  Recently I had a case where a patient had 2 stones of different compositions; a right uric acid stone and a …

• ask the expert
• kidney
• renal stones