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Extensive pneumatized air cells causing susceptibility artifacts in the petrosus part of the ICA.
- Source :
-
Clinical neuroradiology [Clin Neuroradiol] 2017 Mar; Vol. 27 (1), pp. 91-96. Date of Electronic Publication: 2015 May 05. - Publication Year :
- 2017
-
Abstract
- Introduction: 3D-Time-of-flight magnetic-resonance-angiography (TOF MRA) is an established method in vessel analysis. However, many artifacts that occur may lead to a false diagnosis. This retrospective study evaluates the coherence of MR artifacts to extensive pneumatized air cells surrounding the internal carotid artery (ICA) in the petrosus part of the temporal bone.<br />Materials and Methods: Patients who received 3D-TOF MRA and multidetector helical computed tomography (CT) angiography were registered from April 2012 to April 2013. Of these patients, both ICAs in the petrosus part were analyzed. Vertical maximum intensity projection (MIP) artifacts were graduated as normal, mild to moderate, and severe artifacts. The distinction of the vertical part of the pneumatized air cells was also categorized in three groups, regarding the circumference of the ICA in pneumatization ≤ 90°, between 90° and 180°, and ≥ 180°.<br />Results: A total of 203 vessels were collected for analysis. The more extensive the pneumatized air cells were present, the more band-like artifacts and pseudostenosis at the vertical portion of the petrosus part of the ICA were registered.<br />Conclusion: Careful examination of the source images and evaluation of the size of the pneumatized air cells with CT scan are essential to avoid false positive diagnosis in the distal petrosus part of the ICA.
- Subjects :
- Adult
Aged
Aged, 80 and over
Air
Female
Humans
Imaging, Three-Dimensional methods
Male
Middle Aged
Reproducibility of Results
Sensitivity and Specificity
Artifacts
Carotid Artery Diseases diagnostic imaging
Carotid Artery, Internal diagnostic imaging
Diagnostic Errors prevention & control
Magnetic Resonance Angiography methods
Petrous Bone diagnostic imaging
Subjects
Details
- Language :
- English
- ISSN :
- 1869-1447
- Volume :
- 27
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Clinical neuroradiology
- Publication Type :
- Academic Journal
- Accession number :
- 25939527
- Full Text :
- https://doi.org/10.1007/s00062-015-0392-0