Analisis Variasi Nilai Time Inversion (TI) Terhadap Infromasi Citra MRI Knee Joint Potongan Sagital Sekuen PDW SPAIR
DOI:
https://doi.org/10.31983/jimed.v11i2.13326Keywords:
Knee Joint, SPAIR, Time InversionAbstract
Background: Magnetic Resonance Imaging (MRI) is a non-invasive imaging modality essential for evaluating complex anatomical structures such as the knee joint. MRI allows multiplanar imaging with high soft tissue contrast resolution. In knee imaging, the sagittal plane is particularly effective in assessing pathologies and visualizing structures like cartilage, menisci, bones, and ligaments (ACL and PCL). Proton Density Weighted (PDW) sequences combined with Spectral Adiabatic Inversion Recovery (SPAIR) fat suppression are commonly used to enhance soft tissue visualization. The image quality in SPAIR sequences is significantly influenced by the Time Inversion (TI) parameter. This study aimed to analyze the impact of varying TI values on the image quality of sagittal PDW SPAIR MRI of the knee joint, focusing on anatomical detail and contrast resolution.
Methods: This research used a quantitative analytical method with an experimental approach. The study was conducted at the Radiology Department of Pertamina Central Hospital from March to April 2025. Ten knee MRI examinations were selected as samples. Image quality was assessed by three radiologists using a structured scoring questionnaire. The data were analyzed using non-parametric statistical tests, including Friedman and Wilcoxon Signed-Rank tests.
Results: The Friedman test revealed statistically significant differences in anatomical detail (χ²(2) = 15.000, p = 0.001) and contrast resolution (χ²(2) = 17.882, p = 0.000) across the three TI values (100 ms, 160 ms, and 200 ms). Post-hoc Wilcoxon analysis showed that both TI 160 ms and 200 ms provided significantly higher image quality than 100 ms (p < 0.017) in both parameters. However, no significant differences were found between TI 160 ms and 200 ms (p = 0.506 for anatomical detail, p = 0.273 for contrast resolution). Among the values tested, TI 160 ms demonstrated consistent and optimal scores for both image clarity and contrast.
Conclusions: A TI value of 160 ms in the PDW SPAIR sequence is recommended as the optimal parameter for producing superior sagittal MRI images of the knee joint, particularly in terms of anatomical clarity and contrast resolution.References
Ary, N. S. (2017). Analisa Variasi Nilai Inversion Delay Terhadap Informasi Anatomi Citra MRI Knee Joint Potongan Sagital Dengan Proton Density Weighted SPAIR.
Astuti, T. D., Murniati, E., & Mulyati, S. (2016). Analisis Informasi Citra MRI Genu Potongan Aksial antara Sekuen Short TAU Inversion Recovery (STIR) dan Sekuen T2-Spectral Attenuation Inversion Recovery (T2-SPAIR). Jurnal Imejing Diagnostik (JImeD), 2(1), 103–110. https://doi.org/10.31983/jimed.v2i1.3165
Grande, del F., Francesco Santini Daniel A Herzka, Michael R, C., & Garry E. Gold, J. A. carrino. (2014). Fat Suppression Techniques for 3T MRI of The Musculoskeletal System. Physiology & Behavior, 176(10), 139–148. https://doi.org/10.1148/rg.341135130.Fat-Suppression
I, W. S., Sugiyanto, & Edy, S. (2017). Pengaruh Variasi Time Inversion (TI) Pada SPAIR Terhadap Informasi Anatomi MRI Abdomen Sekuens T2WI In Axial.
Kesehatan Masyarakat, J., Widya Risma, F., Putu Eka Juliantara, I., Luh Putu Sari Widari, N., Teknik Radiodiagnostik dan Radioterapi Bali, A., & Author, C. (2024). Perbandingan Cnr Mri Knee Joint Pasien Ligament Injury : Studi Komparasi Kombinasi Flip Angle Dan Time Inversion. 8, 3801–3809.
Lee, S., Lee, G. Y., Kim, S., Park, Y. B., & Lee, H. J. (2020). Clinical utility of fat-suppressed 3-dimensional controlled aliasing in parallel imaging results in higher acceleration sampling perfection with application optimized contrast using different flip angle evolutions MRI of the knee in adults. British Journal of Radiology, 93(1112). https://doi.org/10.1259/bjr.20190725
Petscavage, J. M., Ha, A. S., Khorashadi, L., Perrich, K., & Chew, F. S. (2011). New and improved orthopedic hardware for the 21st century: Part 2, lower extremity and axial skeleton. American Journal of Roentgenology, 197(3), 434–444. https://doi.org/10.2214/AJR.10.5354
Wahyudiarti, E., Winarno, G., Gunawati, S., Prananto, L., & Heru, N. (2021). Perbandingan Citra Mri Pedis Sequence Proton Density Fat Saturated Dan Stir (Short Tau Inversion Recovery) Potongan Sagital. JRI (Jurnal Radiografer Indonesia), 4(1), 18–24. https://doi.org/10.55451/jri.v4i1.81
Westbrook, C. (2019). HANDBOOK OF MRI TECHNIQUE (Fourth Edi).
