Plan the axial oblique thin slab (20mm) on the HASTE sagittal localizer. Position the planning block parallel to the duct. Check the positioning block in the axial planes and center it over the duct, ensuring it aligns with the right side duct for right parotid sialogram and the left side duct for left parotid sialogram.

2024年9月23日 · Sialography is the imaging of the salivary glands, most commonly the parotid gland. The salivary ducts are conventionally examined fluoroscopically with high sensitivity, though cross-sectional imaging with CT or MR sialography has also been described.

2016年2月27日 · Sialography involves the introduction of a water-soluble contrast agent into the orifices of the salivary ducts. In most cases, this procedure requires a minimum of specialized equipment and can be performed in a regular radiographic or fluoroscopic room.

2022年12月23日 · When compared to conventional sialography, CT sialography allow precise evaluation of location and size of sialoliths which are small and non-radiopaque, and multiplanar 3D reconstructed images allow clear visualization of salivary gland stone without superimposition of anatomical structures.

2 mm axial CT slices are acquired from the skull base to the hyoid bone which are reformatted at 1 mm for display, and multiplanar reconstruction in coronal and sagittal planes is performed [1]. CT sialography, introduced in late 1970s and early 1980s allows precise mapping of lling defects or non-radiopaque

Position head so that the medial plane of the skull is perpendicular to middle of table. 4. Extend chin parallel with the plane of the film. 5. Direct central ray at right angles to IOML & center midway between E.A.M. 6. Bucky.

To note the position and/or presence of any radiopaque obstruction. To assess the position of shadows cast by normal anatomical structures that may overlie the gland, such as the hyoid bone. To assess the exposure factors. FILLING PHASE Having obtained the scout films, the relevant duct orifice needs to be found, probed, dilated

This quiz covers various sialography techniques used in radiology, focusing on different projection methods such as lateral, oblique, and axial projections. You'll learn about patient positioning, imaging details, and the anatomical structures visualized during these procedures.

2014年2月23日 · Position: No rotation is evident, as indicated by symmetric petrous ridges and by equal distances from the midsagittal plane (which can be identified by the perpendicular plate) to each anterior clinoid process. A correct position image will have the following features (CR angulation required depends on the structure of interest):