Related Experiment Video
Updated: Jul 4, 2026
A Multicenter MRI Protocol for the Evaluation and Quantification of Deep Vein Thrombosis
Published on: June 2, 2015
[Cross-sectional imaging in dentomaxillofacial diagnostics: dose comparison of dental MSCT and NewTom 9000 DVT]
E Coppenrath1, F Draenert, U Lechel
1Institut für klinische Radiologie, Ludwig-Maximilians-Universität München. eva.coppenrath@med.uni-muenchen.de
Purpose:
For nonsuperimposed and three-dimensional imaging of jaws and teeth, multislice computer tomography (MSCT) can be performed, or alternatively digital volume tomography as a cone beam technique can be applied. The radiation dose of both procedures should be evaluated with different methods of dose assessment.
Materials And Methods:
A 4-row MSCT (Volume Zoom Siemens) and a cone beam CT (NewTom QR-DVT 9000) were compared regarding the radiation exposure of the patient during a dental examination. Organ dose and effective dose were estimated by thermoluminescence dosimetry (TLD) using an Alderson-Rando phantom for both devices. In addition the effective dose of MSCT was calculated from the CTDIvol-value at scanner display and by CT-Expo program.
Results:
The effective dose of MSCT was 0.33 mSv for women (w) and 0.32 mSv for men (m) measured with TLD in the Alderson-Rando phantom, 0.39 / 0.35 mSv (w/m) by CTDI calculation and 0.39 / 0.33 mSv by CT-Expo program. The effective dose of NewTom QR-DVT 9000 from TLD measurement was 0.095 / 0.093 mSv (w/m).
Conclusion:
The radiation exposure of a typical dental examination with a NewTom cone beam DVT is about one third of the MSCT dose. Both techniques, however, moderate patient doses. Dosimetry methods as routinely used for MSCT cannot be applied to cone beam DVT.
Related Concept Videos
01:10Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
01:28Imaging Studies for Cardiovascular System V: CT
01:27Imaging Studies III: Computed Tomography
01:14Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
01:30Radiological Investigation II: MRI and Ventilation Perfusion Scan
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
01:20Imaging Studies for Cardiovascular System III: X-Ray
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...