Meniscus tear mri and images
Meniscus tear mri
Meniscus tear is one of the main reasons of knee joint ache, normally the X-ray and CT scanning can not display meniscus conditions. By the reason of mri has high organization resolution ratio, and mri can multiaspect imagery,its diagnostic accuracy rate is 80% – 100%,so mri becoming the best check method for meniscus tear, here are stoller grading for tore meniscus on mri result.
Grade one: Performance of amorphous or spherical high signal shadow. But this is not reach the meniscal articular surface edge,so the type of damage under the arthroscope appears normal.
Grade two: Performance of linear high signal on the image.In other words,it means serious degeneration,and it is the continue of grade one, which not reach the meniscus articular surface but can reach margin of articular rim,however, it doesn’t mean grade two damage will progress to grade three.
Grade three:It shows linear or diffuse high signal and extended to the joint surface,this is named meniscus tear.As there is various and complex of meniscus tear,so judging correctly meniscus tear parts, shape, type is good for the formulation of clinical operation program.According the mri signal,meniscus tear is mainly classified six types.
1,meniscus level tear: high signal shadow that is parallels with tibial on mri result, this type tear relatively rare.
2,meniscus vertical tear: high signal shadow that is verticals with tibial on mri result.
3,meniscus diagonal tear: high signal shadow that has certain angles with tibial on mri result, strip high signal on the shadow achieves articular surfaces or inferior margin,sometimes it is not easily distinguish with longitudinal shape meniscus tear, this is the most common type injury.
4,meniscus longitudinal tear: high signal shadow that is parallels with meniscus’long axis on mri result. This type of meniscus tear involving wide range and may lead to bucket handle tear.
5,meniscus bucket handle tear:this type tear involving all parts of the meniscus,which has heavily meniscus tear symptoms,obvious of joint bowstring,it usually caused from meniscus longitudinal tear.
6,meniscus radial tear: high signal shadow that is verticals with meniscus’long axis on mri result.It is mainly caused in 1/3 of medial meniscus.This type tear relatively rare.
There is other types tear,such as meniscus joint capsule separation, parrot mouth shape tear,and so on,these types tear relatively rare.