Axial HRCT, two-dimensional and maximum intensity projection reconstructions in temporal bone lesions

Area of Science:

• Radiology
• Otolaryngology
• Medical Imaging

Background:

• Coronal high-resolution computed tomography (HRCT) of the temporal bone is crucial for evaluating hearing loss.
• Coronal imaging acquisition can be uncomfortable and technically challenging for certain patients.

Purpose of the Study:

• To evaluate the diagnostic capability of axial HRCT with 2D multiplanar and MIP reformations for temporal bone pathologies.
• To assess if this technique can replace traditional coronal imaging for hearing loss evaluation.

Main Methods:

• Axial 1 mm HRCT slices of the temporal bone were acquired in 10 patients.
• Images were processed on a workstation for 2D multiplanar and sagittal maximum intensity projection (MIP) reformations.
• Diagnostic quality of reconstructions for various temporal bone structures and pathologies was assessed.

Main Results:

• Axial HRCT images identified fine temporal bone structures in all cases.
• 2D coronal reconstructions best visualized the tegmen tympani, atticus, and cochlea.
• 2D sagittal reconstructions excelled in visualizing the aditus ad antrum, facial canal, vestibule, and semicircular canals.
• Sagittal MIP reconstructions were optimal for viewing middle ear ossicle joints.

Conclusions:

• Axial HRCT combined with 2D multiplanar and MIP reformations provides sufficient diagnostic quality for temporal bone evaluation in hearing loss.
• This approach offers a viable alternative to uncomfortable coronal imaging, improving patient comfort and technical feasibility.