Non-EPI versus Multishot EPI DWI in Cholesteatoma Detection: Correlation with Operative Findings.

Area of Science:

• Radiology
• Medical Imaging
• Otolaryngology

Background:

• Cholesteatoma evaluation often utilizes multishot EPI (readout-segmented EPI) DWI.
• The comparative efficacy of readout-segmented EPI versus non-EPI techniques like HASTE for cholesteatoma detection remains unclear.

Purpose of the Study:

• To compare the diagnostic accuracy of readout-segmented EPI with HASTE DWI for cholesteatoma detection.
• To evaluate the performance of these sequences in identifying both primary and recurrent cholesteatomas.

Main Methods:

• Retrospective review of 23 patients with suspected cholesteatomas who underwent both HASTE and readout-segmented EPI MRI.
• Surgically confirmed cholesteatomas served as the gold standard.
• Two neuroradiologists assessed images, calculating signal intensity ratios and noting lesion detectability.

Main Results:

• HASTE DWI correctly identified cholesteatomas in 100% of patients.
• Readout-segmented EPI yielded positive results in 69.6%, equivocal in 21.7%, and false negatives in 8.7%.
• HASTE demonstrated a significantly higher average signal intensity ratio compared to readout-segmented EPI, enhancing lesion detection.

Conclusions:

• HASTE DWI significantly outperforms readout-segmented EPI in detecting cholesteatomas.
• The HASTE technique is more effective for identifying both primary and recurrent/residual cholesteatomas.
• These findings support HASTE as a preferred DWI sequence for cholesteatoma evaluation.