Analisis Informasi Citra Anatomi Pada MRI Lumbal T2 Turbo Spin Echo (TSE) Potongan Axial Dengan Variasi Ukuran Matriks

Abstract

Background: The use of matrix size is a way to increase the spatial resolution. By using a small matrix size, it will reduce the spatial resolution, on the contrary, the use of a large matrix size will cause noise in the image. At Prof. Dr. R. Soeharso Orthopedic Hospital, the use of a low matrix will cause blurry images but can reduce scan time. The purpose of this research is to find out the difference in anatomical image information and to determine the optimal image for Lumbar MRI examination of T2 TSE axial sequence pieces with variations in matrix size.
Methods: This type of research is quantitative research with an experimental approach. This research was conducted at the Radiology Installation of Orthopedic Hospital Prof. Dr. R. Soeharso Surakarta. The research was conducted on 10 volunteers for Lumbar MRI examination with matrix size variations of 256 x 256, 384 x 384, and 512 x 512. Assessment of image results is carried out by giving questionnaires to respondents then for data processing is carried out with the Friedman test and Wilcoxon test.
Results: The results of the Lumbar MRI research of the T2 TSE axial sequence with variations in matrix size found that there were significant differences in all anatomy with a p value of 0.000 (p<0.05). There were differences for each anatomy of the nucleus, ligament flavum, spinous process, lamina arcus vertebrae, facet joint, spinal canal, neural foramina, transverse nerve, exiting nerve, and recess lateralis between matrices with a p value of 0.000. For annulus fibrosus p value 0,05. The optimal image results on all anatomical anatomies were obtained in a matrix measuring 384 x 384 with a mean rank value of 2.45.
Conclusions: The matrix with a size of 384 x 384 can display clearly, especially the small anatomy found in the lumbar such as the facet joint, neural foramina, transverse nerve, exiting nerve, and recess lateralis.