Related Experiment Videos
Electron beam tomography with three-dimensional reconstruction in the diagnosis of aortic diseases
1Department of Radiology, Cardiovascular Institute and FuWai Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing.
Insights
Electron beam tomography angiography, with ECG-triggering, effectively diagnoses aortic diseases and provides high-quality 3D images. This method offers excellent diagnostic accuracy, comparable to conventional angiography, for various aortic conditions.
Area of Science:
- Cardiovascular Imaging
- Radiology
- Medical Diagnostics
Background:
- Aortic diseases require accurate diagnostic imaging.
- Electron beam tomography (EBT) and 3D reconstruction are emerging techniques.
Purpose of the Study:
- To evaluate EBT protocols and 3D reconstruction for diagnosing aortic diseases.
- To assess the diagnostic value of these imaging techniques.
Main Methods:
- Retrospective comparative study of 189 patients with aortic diseases.
- Utilized ECG-triggered single-slice scanning for thoracic aorta and continuous-volume scanning for abdominal aorta.
- 3D reconstructions performed using shaded-surface display, multiplanar reformatting, and maximum intensity projection.
Main Results:
- ECG-triggered EBT improved image quality for the ascending aorta.
- Continuous-volume scanning was efficient for abdominal aorta screening, reducing scan time and contrast media.
- Diagnosed 189 cases including aortic dissection, aneurysm, pseudoaneurysm, Marfan's syndrome, Takayasu's arteritis, and congenital malformations.
- Achieved 97% diagnostic accuracy when compared to surgical findings in 68 cases.
Conclusions:
- ECG-triggered, contrast-enhanced EBT is feasible for diagnosing diverse aortic diseases.
- The technique yields excellent 3D images, competitive with conventional angiography.
- EBT offers a valuable tool for comprehensive aortic disease assessment.
Background:
This study was performed to evaluate the protocols of electron beam tomographic angiography and three-dimensional reconstruction for assessing the diagnostic value of aortic diseases.
Experimental Design:
Retrospective and comparative study.
Settings:
University hospital.
Patients:
Between 1996 and 1998, 189 cases who underwent electron beam tomographic angiography and diagnosed with aortic diseases were analyzed retrospectively. The results were compared with surgical and pathological findings in 68 cases. Electron beam tomographic angiography was used single-slice-scanning with ECG-triggering for screening of the thoracic aorta, continuous-volume-scanning, permitted by continuous X-ray exposure with table incremention, was performed for the abdominal aorta scanning without ECG-triggering. Three-dimensional reconstructions were performed with shaded-surface display, multiplanar reformatting and/or maximum intensity projection methods.
Results:
Electron beam tomography angiography with ECG-triggered sections of single-slice-scanning improved the image quality of the ascending aorta without motion artifacts. Continuous-volume-scanning was suitable for screening of the abdominal aorta because of minimizing exposure time (10-14 sec) and saving contrast media (total contrast material of 45.5+/-6.6 ml was needed). One hundred eighty-nine cases were diagnosed with aortic dissection (97 cases), aortic aneurysm (26 cases), pseudoaneurysm (8 cases), Marfan's syndrome (39 cases), Takayasu's arteritis (5 cases) and congenital aortic malformations (14 cases). Electron beam tomography results were compared with the findings of surgery (as gold standard) in 68 cases, the diagnostic accuracy was 97% (2 cases with aortic aneurysm were erroneously diagnosed with pseudoaneurysm).
Conclusions:
Electrocardiographically triggered, contrast-enhanced electron beam tomography is feasible for the diagnosis of all kinds of aortic diseases, with excellent three-dimensional images competitive in quality with conventional selective aortic angiography or digital subtraction angiography.