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Selective conformal radiotherapy for arteriovenous malformation involving the spinal cord

¹ Department of Radiology, Wakayama Medical University (WMU), Kimiidera 811-1, Wakayama City, 641-0012 and ² Department of Radiology, Kishiwada Tokushukai Hospital, Japan

View larger version (158K): [in a new window]   Figure 1. Before radiotherapy. (a) CT image during myelograpy. Compression of dural sac and spinal cord. Porous change of vertebral body. (b) Enhanced CT image. Abnormal enhancement in the right spinal erector muscles. (c) Early venous filling. (d) Dose distribution curves in radiation planning. From inside to outside, each line indicates 100%, 90%, 70%, 50%, and 30% of the prescribed dose.

View larger version (132K): [in a new window]   Figure 2. During and after radiotherapy. (a) T2 weighted MRI. Distended epidural veins. Note T2 hyperintensity in the spinal cord. (b) MRI image on the 21st day. The spinal cord was not compressed. The epidural vein was shrunk. (c) MRI image 1 year later. Complete disappearance of the epidural venous. No T2 enhancement in the spinal cord.