Article Figures & Data
Figures
- Fig 1.
Schematic representation of the membranous labyrinth. A, magnified cross-section of the cochlea. B, Magnified exposed view of the crista ampullaris of the superior semicircular duct. C, Magnified exposed view of the utricular macula. SV indicates scala vestibuli; SM, scala media; ST, scala tympani.
- Fig 2.
Utricular macula. Axial (A and B), coronal (C and D), oblique sagittal (Poschl plane) (E and F), and oblique coronal (Stenvers plane) (G and H) images of the utricular macula. In vivo 3T (A, C, E, and G) and ex vivo 9.4T (B, D, F, and H) MR images demonstrate low-signal-intensity focus (arrow) corresponding to the neurosensory epithelium of the utricular macula.
- Fig 3.
Saccular macula. Axial (A and B), coronal (C and D), oblique sagittal (Poschl plane) (E and F), and oblique coronal (Stenvers plane) (G and H) images. Ex vivo 9.4T MR images (B, D, F, and H) demonstrate low-signal-intensity curvilinear focus (arrow) corresponding to the neurosensory epithelium of the saccular macula along the medial wall of the vestibule. In vivo 3T MR images (A, C, E, and G) do not differentiate the macula from the medial wall of the vestibule (arrow).
- Fig 4.
Crista ampullaris of the superior semicircular duct. A, In vivo 3T oblique sagittal (Poschl plane) image in the plane of the superior canal demonstrates a linear area of low signal intensity (arrow) corresponding to the crista ampullaris of the superior duct. B, Ex vivo 9.4T oblique sagittal image demonstrates similar findings (arrow).
- Fig 5.
Crista ampullaris of the lateral semicircular duct. A, In vivo 3T oblique sagittal (Poschl plane) image in the plane of the superior canal demonstrates a linear area of low signal intensity (arrow) corresponding to the crista ampullaris of the lateral duct. B, Ex vivo 9.4T oblique sagittal image demonstrates similar findings (arrow). C, In vivo 3T coronal image demonstrates focal area of low signal intensity (arrow) in the ampulla of the lateral canal corresponding to the crista. D, Corresponding ex vivo 9.4T image with a similar appearance (arrow).
- Fig 6.
Crista ampullaris of the posterior semicircular duct. A, In vivo 3T oblique sagittal (Poschl plane) image in the plane of the superior canal demonstrates a linear area of low signal intensity (arrow) corresponding to the crista ampullaris of the posterior duct. B, Ex vivo 9.4T oblique sagittal image demonstrates similar findings (arrow).
- Fig 7.
Cochlear duct. B and D, Ex vivo 9.4T MR images in the axial and oblique sagittal (Poschl) plane demonstrate the triangular fluid compartment in the peripheral aspect of the basal turn of the cochlear (arrow), corresponding to the cochlear duct. A and C, corresponding in vivo 3T MR images do not adequately resolve the Reissner membrane and, therefore, do not demarcate the perilymph in the scala vestibuli from the endolymph in the cochlear duct. Approximated location of the duct is indicated (arrow).
