Three-dimensional Magnetic Resonance Scanning Application Value, The Morphology Of The Adult Knee Cruciate Ligament

[Objective]In this study, we scan samples of knee anatomy and knee cruciate ligaments of adult healthy volunteers with three-dimensional MR.We make a reconstruction of anterior cruciate ligament and posterior cruciate ligament with Mimics 10 software. So we can observe the general shape of adult anterior cruciate ligament and posterior cruciate ligament and measure the anatomical data. Discuss the application of morphological when use MR three-dimensional to scan the knee anterior cruciate ligament and posterior cruciate ligament.Then we analysis the anatomical data of anterior cruciate ligament and posterior cruciate ligament when classify the data by height and gender and find the relationship between them. And make a contrast with the left and right knee.【Method】(1) Specimens Group:Select 60 cases of adult freshly isolated specimens of knee anatomy. First we do three-dimensional MR scan on the cases, then autopsy the knee specimens and measured anterior cruciate ligament and posterior cruciate ligament when the knee were in extension position. Analysis and do a comparison about MR measurement data and the actual anatomical measurements of anterior cruciate ligament and posterior cruciate ligament, then make a correlation analysis.(2) Living Group:Select no history of knee injury and surgery, no knee pain in adult healthy volunteers,120 patients.30 males,30 females, aged 20 to 30 years (mean 26) years, height 155～185cm, the average (170) cm. By height divided into A, B, C3 group (156～165cm, 166～175cm,176～185cm), we can obtain of 40 normal knees'data in each group.(3) By sex were divided into two groups, we can obtain of 60 normal knees'data in each group; By left knee and right knee were divided into two groups, we can obtain of 60 normal knees'data in each group; Then we do MR three-dimensional scanning with the 120 adult patients knee. We measure MR image data of anterior cruciate ligament and posterior cruciate ligament; Analysis and make a correlation analysis about MR measurement data divided by sex and height, and do a comparison about left knee and right knee.(4) Detection equipment:GE1.5T Twin Speed Infinity with Excite II Superconductive magnetic resonance, using the knee coil, the center of the coil is usually located in the level of the lower edge of the patella. (5) Scan sequence:Fat-Suppress 3D Fast Spin-Echo proton density weighted imaging, FS-3D-FSE-PDWI is imply in both living group and specimens group' Knee.(6) Scan position:Subject to inspection were supine position, feet advanced, subjects with knee natural extension, external rotation angle 10～15°fixed, subjects with testing foot braken and accept MR scans under non-weight-bearing.【Result】(1) The anatomical measurements of the length of the anterior cruciate ligament are(3.594±0.22)cm, and MRI measurements are (3.589±0.22)cm, P value:0.29>0.05, no significant difference; Anatomy measurements of the anterior cruciate ligament thickness are (0.603±0.05) cm, and MRI measurements are (0.601±0.05)cm, P value:0.08>0.05, no significant difference; Anatomy measurements of the angle of the anterior cruciate ligament and coronal are (39.41±5.42)°,and MRI measurements are (39.40±5.42)°, P value:1.00>0.05, no significant difference.(2) The pnatomical measurements of the length of the anterior cruciate ligament are (3.715±0.22) cm, and MRI measurements are (3.713±0.22) cm, P value:0.23>0.05, no significant difference; Pnatomy measurements of the anterior cruciate ligament thickness are (0.562±0.06)cm, and MRI measurements are (0.561±0.063)cm, P value:0.08>0.05, no significant difference; Anatomy measurements of the angle of the anterior cruciate ligament and coronal are (118.2±6.59)°,and MRI measurements are(118.2±6.59)°, P value:0.88>0.05, no significant difference.(3) length of anterior cruciate ligament was significantly associated with height, P value:0.00 (P<0.01), There were significant differences; Thickness of anterior cruciate ligament was significantly associated with height, P value:0.03 (P<0.05), There were significant differences; angle of anterior cruciate ligament and the coronal was no significantly associated with height, P value:0.34 (P>0.05), no significant difference.(4) Length of poterior cruciate ligament was significantly associated with height, P value:0.00 (P<0.01), There were significant differences; Thickness of poterior cruciate ligament was significantly associated with height, P value:0.02 (P<0.05), There were significant differences; angle of anterior cruciate ligament and the coronal was no significantly associated with height, P value:0.27 (P>0.05), no significant difference.(5) Length of anterior cruciate ligament was significantly associated with sex, P value:0.00 (P<0.01), There were significant differences; Thickness of anterior cruciate ligament was significantly associated with sex, P value:0.04(P<0.05), There were significant differences; angle of anterior cruciate ligament and the coronal was no significantly associated with sex, P value:0.25 (P>0.05), no significant difference.(6) Length of pnterior cruciate ligament was significantly associated with sex, P value:0.01 (P<0.05), There were significant differences; Thickness of anterior cruciate ligament was significantly associated with sex, P value:0.04(P<0.05), There were significant differences; angle of anterior cruciate ligament and the coronal was no significantly associated with sex(P>0.05), There were significant differences.(7) There is no significant difference between the length, thickness and angle of ACL and PCL of left and right side of the knee.【Conclusion】(1) There is no significant difference between the measurements of adult' knee ligament anatomical specimens and MR image measurements (t test p>0.05).To a certain extent that the three-dimensional scan of the MR magnetic resonance measurements can reflect the real anatomy value.(2) Length of health adult's knee cruciate ligament was significantly associated with height and sex; Thickness of knee cruciate ligament was significantly associated with height and sex; There is no significant correlation between angle and height, sex; There is no significant difference between the length, thickness and angle of ACL and PCL of left and right side of the knee.