MR ARTIFACTS
Journal Title: Journal of Evidence Based Medicine and Healthcare - Year 2018, Vol 5, Issue 13
Abstract
BACKGROUND Artifacts in MRI image are produced as a result of various factors related to the machine and the subject undergoing MRI. Artifacts not only affect the quality of images, but also lead to misinterpretation of images by mimicking the pathology. Thus the purpose of this article is to help the radiologist be aware of the most common types of artifacts in day-to-day practice, explain in short the physics related to the appearance of artifact and practical steps to reduce or eliminate the artifacts. Imaging in MRI machine is subjected to various types of artifacts. Artifacts lead to diagnostic dilemma and degradation of the image quality. Hence, it is necessary to understand the type of artifact and measures taken to minimize or eliminate the same. Understanding the artifacts is a three step process, firstly knowing about the type of artifact, secondly cause behind it and thirdly how to decrease or remove the artifacts. MATERIAL AND METHODS Indicated cases for MRI imaging with different protocols and sequences depending upon the need were performed at MAAX super speciality hospital an associated hospital of Subbaiah Institute of Medical Sciences, Shimoga with GE 1.5T MRI using conventional 2D and 3D Fourier transform sampling methods and performing the standard sequences mentioned in the image. RESULTS Day to day MRI indicated patients were scanned on 1.5 T MRI with different protocols and sequences later on acquiring these images showed varied artifacts these were characterized and classified later proper correction in protocol, sequences, by adding appropriate filters, adjusting the field of view and by counseling eliminating/reducing the artifacts and thus deriving a proper clinical interpretation. CONCLUSION Grouping the artifacts simplifies the understanding of the cause of artifact. The article also describes the nature of the imaging appearance and simple measures required to reduce or correct the artifacts. It will help the radiologist improvise the quality of the images and have a clear difference between pathology and an artifact.
Authors and Affiliations
Shashank G. D, Uma Pandurangi
Keywords
Related Articles
- EP ID EP541205
- DOI 10.18410/jebmh/2018/245
- Views 70
- Downloads 0
STUDY OF INCIDENCE OF MIDDLE EAR HEMORRHAGE IN DROWNING
OBJECTIVES: An autopsy study of deaths due to drowning with special reference to middle ear hemorrhage and spleen findings was done. METHODS: Data were collected from the police, relatives, and photographic evidences fro...
ROLE OF BONE MARROW ASPIRATION IN DIAGNOSIS OF HAEMATOLOGICAL DISORDER
BACKGROUND The bone marrow examination is an essential investigation for the diagnosis of disorders of the blood and bone marrow. This simple and relatively safe procedure is important, particularly in resource poor cent...
EVALUATION OF BASIC COURSE WORKSHOP CONDUCTED IN A MEDICAL COLLEGE
BACKGROUND Faculty development is perhaps one of the foremost issues among the factors influencing the quality of medical education. It was planned to evaluate Basic course workshop (BCW) on Medical education Technologie...
SHORT TERM OUTCOME OF VAGINAL HYSTERECTOMY- WARD MAYO PROCEDURE
BACKGROUND Vaginal hysterectomy is often performed to correct uterovaginal prolapse. The effect of surgery is seldom addressed. Long term results and QOL data are sparse. The objectives of the study were to determine the...
SERUM CYSTATIN C IS A SUPERIOR MARKER IN ESTIMATING GFR TO ASSESS KIDNEYS DYSFUNCTION- A DESCRIPTIVE CONTROLLED COMPARATIVE STUDY
BACKGROUND Kidney function is accurately assessed by Glomerular Filtration Rate (GFR). GFR is estimated with various biomarkers like inulin, creatinine and Cystatin C. Inulin is not synthesised in the human body. Creatin...