What Is a Foot Ligament?

SE / T1WI with the plantar ligament of the boat is still the best sequence to show normal anatomy. In combination with other sequences, it is used for localization of lesions. It is used for the identification of fats and lesions when other sequences have poor lipid suppression effects. 3D-watersel.-FFE (equivalent to 3D-FS-SPGRE) sequence cartilage showed a significant high signal. The literature reported that 3D-FS-SPGRE is the best sequence to show normal cartilage [6], which can clearly show the anatomy and lesions of joints. Continuous thin-layer images can be obtained without loss of information, low partial volume effect, and high sensitivity for small cartilage defects [7]. This article also believes that the 3D-watersel.-FFE sequence can make articular cartilage prominent, and it is also extremely valuable for the display of bone marrow lesions, and it is also helpful for the identification of normal muscles. However, because the fat signal is suppressed, thinner ligaments that require a high signal of fat for clear display are not satisfactory. FSE / T2WI fat signal is too high, we generally use the SPIR / T2WI sequence, the smaller structure is not as good as SE / T1WI. However, the abnormal changes in muscle and bone marrow are clearly displayed, and the defects of joint cartilage are also better.

Plantar ligament

Right!

SE / T1WI with the plantar ligament of the boat is still the best sequence to show normal anatomy. In combination with other sequences, it is used for localization of lesions. It is used for the identification of fats and lesions when other sequences have poor lipid suppression effects. 3D-watersel.-FFE (equivalent to 3D-FS-SPGRE) sequence cartilage showed a significant high signal. The literature reported that 3D-FS-SPGRE is the best sequence to show normal cartilage [6], which can clearly show the anatomy and lesions of joint Continuous thin-layer images can be obtained without loss of information, low partial volume effect, and high sensitivity for small cartilage defects [7]. This article also believes that the 3D-watersel.-FFE sequence can make articular cartilage prominent, and it is also very valuable for the display of bone marrow lesions, and it is also helpful for the identification of normal muscles. However, because the fat signal is suppressed, thinner ligaments that require a high signal of fat for clear display are not satisfactory. FSE / T2WI fat signal is too high, we generally use the SPIR / T2WI sequence, the smaller structure is not as good as SE / T1WI. However, the abnormal changes in muscle and bone marrow are clearly displayed, and the defects of joint cartilage are also better.

Scan section of foot MRI

Most foot structures can be satisfactorily displayed in the scan of the foot axis, but since most articular surfaces are parallel or nearly parallel to the transverse position, a coronal or sagittal position is needed to observe these joints. Because the structures of the feet are arranged more in the internal and external relationship than in the upper and lower relationship, the coronal position shows that most of the structures are better than the sagittal position, and all the joints except the heel and ankle joints can be clearly displayed. Sagittal position showed long plantar ligament and plantar aponeurosis.

MRI shows advantages and disadvantages of normal soft tissue structure of the foot

At present, the rapid development of multi-slice spiral CT can obtain high-quality cross-section images of human body in any direction plane and curved surface, and it is no worse than MRI in multi-plane imaging. However, CT is not as good at distinguishing soft tissues as MRI. Generally, the structure can only be distinguished by the fat space. It cannot further distinguish different soft tissues and can not reliably distinguish cartilage. In various images of MRI, fat, muscles, tendons and ligaments, cartilage, and blood vessels have significantly different signal intensities and signal changes, which should be the best imaging method for living body cross-section anatomy. However, due to the lack of spatial resolution and the dependence of imaging on hydrogen atoms, MRI shows that some small structures with little water content, such as small ligaments, are still unsatisfactory.