 Good morning everyone. My name is Dr. Dharna Sharma. I'm the resident of the department of radio diagnosis in Maharashtra University, Mulana, Amman. I'm going to talk about the role of MRI in many injuries. As we all know that means a major weight bearing and largest joint that provides mobility stability during physical activities as well as balance while standing. Due to its wide range of function, it is exposed to forces beyond its physiological range, thus making the soft tissues and bone of knees at risk of injuries. The aims of our study is to study the MRI findings in knee injury and correlated with clinical observation, radiological findings and arthroscopy wherever we find, wherever we sit. Then the materials used in this study were that and this study was conducted in the department of radio diagnosis in Maharshi Mukundeshwar Institute of Medical Sciences and Research of almost 100 patients were referred to the department of radio diagnosis for MRI imaging and MR scans were carried out at 1.5 Tesla machine, Philips Akarva machine and with sense extremity call. Arthroscopic knee surgeries were performed in 39 patients. We correlated our MR findings with clinical as well as arthroscopic findings. Then we come to the cases. This is the first case in which we see that there is a mid-substance hyperindex signal on T2-witted sequence and inflator sequence as well. This is a ACL tier. Then this is a case of osteocondrous dissonance in which we can see the subcontinent defect and the medial femoral condy. We can see it on all the sequences, but also there is a fracture fragment lying with it. In this case, we can see that there is a lateral dislocation of patella. In this case, we can see that the medial cortal ligament fibers are thickened and we have a small amount of fluid. Then our observations in MR analysis for ligament injury pattern, including both complete and partial tier, we saw that ACL tiers were 50, PCL were 19, MCL were 17, LCL were 16, total 1-0-2 tiers were seen. Then according to the etiologies, both sensory were most common etiology, total of 32 persons, otherwise roadside accidents, falls, slipping injuries. We performed arthroscopy in 39 subjects and we correlated our MRI findings with arthroscopic findings. Tears on ACL were 29 and on arthroscopy, they were 28. In MR, PCL tiers were 4. On arthroscopy, there were 2. Medial meniscal tier were 25. On arthroscopy, there was 21. Later meniscal tier were 4. On arthroscopy, there were 2. Then we correlated our MR findings of ACL ligament tiers with arthroscopic findings. Tears on MR were 29 and tier came out on arthroscopy were 28. 2 positives were 28. Normal on arthroscopy was 1. False positive was 1. Normal on MR were 10. There was no tier amongst these patients on arthroscopy, so the normal and 2 negatives were 10. Then we also correlated MR and arthroscopic findings in case of posterior cussiate ligament. In that, we found that tier on MR were 4. True positives that were tier on arthroscopy was 2 and normal on arthroscopy were 2, making false positives of 2. Then posterior cussiate ligaments that were normal on MR were 35 and tiers on arthroscopy were 0 and normal on arthroscopy were 35. So, 2 negatives were 35. Then we correlated the later meniscal findings on MR as well as arthroscopy. We found that tiers on MR were 4. Tears on arthroscopy, 2 positives were 2. Normal on arthroscopy was 2. That was false positives. Then normal on MR was 35 and tiers on arthroscopy was 0. Normal on arthroscopy were 35. Correlation of MRI with arthroscopy in medial meniscus tiers were, on MRI there was almost 25 tiers and tiers on arthroscopy was 19. Normal on arthroscopy was 6. Normal on MR were 14. Out of them, tier on arthroscopy came out to be 2 and normal on arthroscopy were 12. Then we also correlated our findings with other studies, studies of singetol and Ranjan and Mohamad. They were good correlation. We saw that ACL tiers were almost 50% in our study and in singetol study they were 45% and in Ranjan and Mohamad they were 76%. PCM was 19% in our study. In singetol it was 5.7% and in Ranjan and Mohamad they were 6%. Medial meniscal tiers were 30% in our study, 32.9% in singetol study and Ranjan and Mohamad 34%. Later meniscal tiers were 17% in our study, 16% in singetol study and 22% in Ranjan and Mohamad. For MCL we had 17% of tiers that correlated with Ranjan and Mohamad that is 28% and in LCL we had 16% in Ranjan and Mohamad they were 18%. Our results were that we saw 100 patients and results when 100 patients were that we saw various lesions, joint diffusion in 70% interior cruciate ligament 50% medial meniscal tier 30% bone contusion 24% fractures 10% later meniscal tier 17% and medial colateral ligament was 17% and later colateral injuries were 16%. So we found that there were good correlation between the MR findings and clinical findings correlation between MR and arthroscopic findings regarding the presence and absence of posterior cruciate ligament was highest with sensitivity of 100% and specificity of 94% negative predictive value of 100% accuracy of 94.8% talking about the sensitivity specificity negative predictive value and positive predictive value and accuracy on MRI for detecting knee injuries we take arthroscopy as gold standard for ACL it was almost like 100% 90.9% specificity negative predictive value 96.5% positive predictive value 97.4% for lateral meniscal the sensitivity was 100% specificity was 94.5% negative predictive value 100% positive predictive value 50% and accuracy 94.8% median meniscal sensitivity was 90.4% specificity 66.7% negative predictive value 85.7% and 76% positive predictive value in conclusion we found that MRI is very useful non-invasive modality with high diagnostic accuracy sensitivity and negative predictive value it is very reliable screening tests for diagnosis of internal derangements and we can save many knees from unnecessary arthroscopic with the help of