Magnetinio rezonanso tomografijos skenavimo protokolo optimizavimas, tiriant sąnarių patologiją 1,5 T galingumo aparatu, profesinio bakalauro baigiamasis darbas

Šeduikytė, Evelina

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Magnetinio rezonanso tomografijos skenavimo protokolo optimizavimas, tiriant sąnarių patologiją 1,5 T galingumo aparatu, profesinio bakalauro baigiamasis darbas

Šeduikytė, Evelina

URI: http://dspace.kaunokolegija.lt//handle/123456789/209

Data: 2018-05

Santrauka:

Baigiamojo darbo metu siekiama optimizuoti MRT skenavimo protokolą, tiriant sąnarių patologiją 1,5 T. galingumo aparatu. Siekiama įvertinti MRT aparato (SIEMENS, 1,5 T.) sąnarių tyrimų protokolus pagal skirtingas indikacijas, tyrimus atliekant paviršinėmis (lanksčiomis) ir tūrinėmis ritėmis, skirtingais režimais bei parametrais

Description:

Full names of the authors: Evelina Šeduikytė, supervisor of the research – Zita Sakalauskienė. Title of thesis: MRI protocol optimization of the pathological joints at 1.5 T. Relevance of the topic: Magnetic resonance imaging (MRI) is a very important method to diagnose musculoskeletal system pathologies: age-related degenerative diseases, micro trauma, macro trauma, tendons and ligaments ruptures or inflammations (Mervat et al., 2017). Lithuanian Health Statistics data (2016) shows, that the incidence of connective tissue and musculoskeletal system diseases was diagnosed in 10.4% among children (0-17 years old) and 20.2% for adults. As the prevalence of patients’ illness increases, the number of MRI tests performed increases accordingly. An MRI scanning of joints is performed by using various scanning sequences and parameters, so it is important for radiographers to know about the MRI scan protocols. Aim of the study: to optimize MRI protocols of musculoskeletal joints pathologies at 1.5T. To achieve this aim, the following objectives had to be performed: 1) to theoretically describe the MRI scan protocols of the MSK joints; 2) to assess joints examinations of the MRI (SIEMENS, 1.5 T.) according to different indications, flexible array coils, parameters and sequences; 3) to assess joints examinations of the MRI (SIEMENS, 1.5 T.) according to different indications, phased array coils, parameters and sequences and to compare the data. Research methodology included analysis of scientific literature of foreign and Lithuanian authors, data collection in quantitative research, and application of the descriptive data analysis method. Research findings: the age of patients, who had MRI of joints, was between 18 and 85 years, including 42 men (56%) and 33 women (44%), their mean height was 173.0 ± 6.5 cm, mean weight 76.9 ± 14.7 kg. The study found that 54 (72%) patients had MRI scans performed by using phased array coils and 21 (28%) patients’ MRI exams were done with flexible coils. Data of the study showed that the knee MRI examinations with phased array coils lasted 2.21 minutes shorter, the elbow joint - 3 minutes shorter than MRI performed with flexible - surface coils. Conclusions: 1. According to the analyzed literature, irrespective of the pathology (trauma, tumors) fat suppressed PD weighted MRI imaging sequence in axial, sagittal, and coronal projections were recommended for joints MRI examinations. 2. MRI joint examinations with flexible - surface coils scan take longer, require scans repetition. For high-quality knee joint MRI examination with a flexible coil the parameter of PO (phase oversampling) in the protocol is changed for proton density coronal projection sequence. The changes of parameter extend the sequence time to 5:55 minutes, that helps to avoid artifacts in the images. 3. MRI scans of the knee, elbow, and ankle joints are optimally performed by using phased coils.

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