Artifacts in Magnetic Resonance Imaging
PBN-AR
Instytucja
Instytut Matki i Dziecka
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Polish Journal of Radiology
ISSN
1733-134X
EISSN
Wydawca
International Scientific Literature, Inc.,
DOI
Rok publikacji
2015
Numer zeszytu
brak
Strony od-do
93-106
Numer tomu
80
Identyfikator DOI
Liczba arkuszy
Autorzy
Słowa kluczowe
en
Artifacts
Image Interpretation
Computer-Assisted
Magnetic Resonance Imaging
Open access
Tryb otwartego dostępu
Otwarte czasopismo
Wersja tekstu w otwartym dostępie
Wersja opublikowana
Licencja otwartego dostępu
Creative Commons — Uznanie autorstwa-Niekomercyjne-Bez utworów zależnych
Czas opublikowania w otwartym dostępie
Razem z publikacją
Streszczenia
Język
en
Treść
Artifacts in magnetic resonance imaging and foreign bodies within the patient’s body may be confused with a pathology or may reduce the quality of examinations. Radiologists are frequently not informed about the medical history of patients and face postoperative/other images they are not familiar with. A gallery of such images was presented in this manuscript. A truncation artifact in the spinal cord could be misinterpreted as a syrinx. Motion artifacts caused by breathing, cardiac movement, CSF pulsation/blood flow create a ghost artifact which can be reduced by patient immobilization, or cardiac/respiratory gating. Aliasing artifacts can be eliminated by increasing the field of view. An artificially hyperintense signal on FLAIR images can result from magnetic susceptibility artifacts, CSF/vascular pulsation, motion, but can also be found in patients undergoing MRI examinations while receiving supplemental oxygen. Metallic and other foreign bodies which may be found on and in patients’ bodies are the main group of artifacts and these are the focus of this study: e.g. make-up, tattoos, hairbands, clothes, endovascular embolization, prostheses, surgical clips, intraorbital and other medical implants, etc. Knowledge of different types of artifacts and their origin, and of possible foreign bodies is necessary to eliminate them or to reduce their negative influence on MR images by adjusting acquisition parameters. It is also necessary to take them into consideration when interpreting the images. Some proposals of reducing artifacts have been mentioned. Describing in detail the procedures to avoid or limit the artifacts would go beyond the scope of this paper but technical ways to reduce them can be found in the cited literature.
Cechy publikacji
REVIEW_ARTICLE
Inne
System-identifier
552917
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