Imaging Pearls ❯ Dual Energy ❯ Vascular Applications
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- “ Dual-energy bone subtraction has been shown to be faster and technically superior to threshold-based bone subtraction techniques even when the latter are manually corrected. However, even dual-energy bone subtraction is not infrequently incomplete.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “ Although heavily calcified plaque in contact with bone can also be misclassified as bone and removed with dual energy subtraction , DECT’s reliance on iodine-calcium material differentiation reduces the incidence and severity of these artifacts .”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “ The clinical interpretation advantage of 3D-rendered volumetric data are limited by the need for software assisted Hounsfield unit-threshold-based bone subtraction. This is not only time consuming, but the quality of bone subtraction is subject to patient and user dependent variation.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “Dual energy vascular imaging is a versatile tool for the evaluation of the aorta, craniocervical, and lower limb vasculature. Appropriate use of techniques can save radiation dose, decrease interpretation time, or improve diagnostic accuracy.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97
- “ Dual-energy bone subtraction has been shown to be faster and technically superior to threshold-based bone subtraction techniques even when the latter are manually corrected. However, even dual-energy bone subtraction is not infrequently incomplete.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “ Although heavily calcified plaque in contact with bone can also be misclassified as bone and removed with dual energy subtraction , DECT’s reliance on iodine-calcium material differentiation reduces the incidence and severity of these artifacts .”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “ The clinical interpretation advantage of 3D-rendered volumetric data are limited by the need for software assisted Hounsfield unit-threshold-based bone subtraction. This is not only time consuming, but the quality of bone subtraction is subject to patient and user dependent variation.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97 - “Dual energy vascular imaging is a versatile tool for the evaluation of the aorta, craniocervical, and lower limb vasculature. Appropriate use of techniques can save radiation dose, decrease interpretation time, or improve diagnostic accuracy.”
Dual-Energy CT: Vascular Applications
Vlahos I et al.
AJR 2012; 199:S87-S97
- “ Compared with standard FBP reconstruction, an IRIS algorithm enables significant reduction of image noise and improvement of image quality and has the potential to decrease radiation exposure during contrast enhanced dual energy CT abdominal examinations.”
Improved Image Quality in Dual Energy Abdominal CT: Comparison of Iterative Reconstruction in Image Space and Filtered Back Projection Reconstruction
Wang R et al.
AJR 2012; 199:402-406 - “ The image noise using IRIS algortihm was lower than that using standard FBP algorithm on the liver, aorta, and subcutaneous fat respectively. The signal-to-noise ratio and contrast to noise ration of images reconstructed with the IRIS algorithm also were significantly higher than those reconstructed with the FBP algorithm”
Improved Image Quality in Dual Energy Abdominal CT: Comparison of Iterative Reconstruction in Image Space and Filtered Back Projection Reconstruction
Wang R et al.
AJR 2012; 199:402-406
- “Best results for both postprocessing methods were achieved in the vascular segments of the upper leg. In severely calcified segments, sensitivity, specificity, and accuracy stayed above 90% by the dual-energy bone removal technique, whereas the conventional bone removal technique showed a substantial decrease of sensitivity, specificity, and accuracy.”
Dual-energy CT angiography in peripheral arterial occlusive disease
Brockmann C et al.
Cardiovasc Intervent radiol 2009 Jul;32(4):630-7 - “Compared with digital subtraction angiography, sensitivity, specificity, and accuracy, respectively, of CTA was 97.2%, 94.1%, and 94.7% by the dual-energy bone removal technique. The conventional bone removal tool delivered a sensitivity of 77.1%, a specificity of 70.7%, and an accuracy of 72.0%.”
Dual-energy CT angiography in peripheral arterial occlusive disease
Brockmann C et al.
Cardiovasc Intervent radiol 2009 Jul;32(4):630-7 - “ DE-CTA is a feasible and accurate diagnostic method in the assessment of symptomatic peripheral arterial occlusive disease. Results obtained by DE-CTA are superior to the conventional bone removal technique and less dependent on vessel wall calcifications.”
Dual-energy CT angiography in peripheral arterial occlusive disease
Brockmann C et al.
Cardiovasc Intervent radiol 2009 Jul;32(4):630-7 - Dual Energy: Vascular Applications
- Virtual noncontrast CT
- Ability to remove calcium from vessels
- Automatic bone removal
- Ability to enhance small branch vessels
- Potential lower radiation dose (single run)
- Potential for lower contrast volumes