The Application Value Of 3.0T Magnetic Resonance DTI Technique In The Diagnosis Of Normal Cervical Spinal Cord And Cervical Spinal Cord Concussion

Object:The application of 3.0 diffusion tensor imaging(DTI)technique was used to study the value of normal cervical spinal cord and early diagnosis of cervical spinal cord concussion(SCC).Materials and Methods:Twenty healthy volunteers were collected as group A;30 patients with acute cervical spinal cord injury were diagnosed according to clinical symptoms and signs from October 2017 to December 2018 due to cervical trauma.Spinal cord concussion injuries were divided into group B and group C.Group B included the criteria: three diagnostic criteria for SCC proposed by Zwimpfer:(1)neurological dysfunction immediately after spinal trauma;(2)neurological dysfunction consistent with spinal cord injury plane;(3)nervous system dysfunction completely recovered within 72 hours after injury.Another group of patients who did not meet the criteria were divided into group C.The number of patients in group B and group C was 14,16 respectively.Using Siemens' Magnetom Skyra 3.0T superconducting magnetic resonance scanner,the coil is a 16-channel head and neck combined coil,which performs conventional MRI plain and DTI scans respectively,and MRI-DTI scan uses single-shot fast spin echo(Single-shot Echo-palnar Imaging,SS-EPI),select 20 gradient directions,b value select 0,700s/mm2,sagittal scanning imaging,post-process the original data in Siemens Sygno NEURO 3D software to obtain color coding pseudo color Figure.(1)A group C2/3,C3/4,C4/5,C5/6,C6/7 intervertebral disc corresponding to cervical spinal cord;(2)B group and C group T2 WI cervical spinal cord with abnormal signal area,cervical vertebrae fracture or soft tissue injury corresponding to cervical spinal cord Level,clinical diagnosis of neurological dysfunction and spinal cord injury plane corresponding area,measuring its ADC value,FA value,?1,?2,?3 value.Group A compared the level of each intervertebral disc corresponding to the difference between the cervical spinal cord values,and then statistically analyzed the values among the three groups A,B,and C,and compared whether there was any difference.Fiber bundle reconstruction of normal and damaged cervical spinal cord was performed by DTT reconstruction technique,observed and compared.Results:1?The level of cervical spinal cord FA in the C2/3 intervertebral disc of group A is higher than that of the other cervical intervertebral disc,and the FA value from the head to the foot side is getting lower and lower;the ADC value of the cervical spinal cord of C2/3 level is lower than that of other cervical spinal cord segments.And the ADC value from the head to the foot side is getting higher and higher,but the difference is not statistically significant.2?Comparison of A,B and C groups,FA value,ADC value and ?3 value of group A and group B,group A and group C,group B and group C,and the difference was statistically significant.3?DTT can be more intuitive,three-dimensional observation of the shape and integrity of the patient's cervical spinal fiber bundle,clearly showing the spinal cord damaged fiber bundles with or without distortion,deformation,compression,fracture and other changes.Conclusion:1?The values of FA,ADC,?1,?2,and ?3 in the spinal cord of different normal discs in normal people are different,but there is no statistical significance.2? patients with acute cervical spinal cord injury DTI sequence scan,FA,ADC values are significantly different than normal people,can more objectively evaluate the condition of cervical spinal cord injury.There are significant differences in FA,ADC and ?3 values between acute cervical spinal cord concussion injury and non-concussion injury,which can help to distinguish the cervical spinal cord injury.3?DTT can visually show the damage of white matter fiber bundles in normal cervical and cervical spinal cord injuries.