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Fig. 3 —Transverse T2-weighted fast spin-echo (TR/TE, 2,500/70)
external phased-array MR image shows lower part of normal external anal
sphincter (ES) at distal anal canal in same 56-year-old woman as in
Figure 2. External anal
sphincter is less detailed on external phased-array MRI than on endoanal MRI
but can be readily identified. TPM = transverse perineal muscle, IAS =
ischioanal space, GM = gluteus muscle.
