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Dynamic Volume Computed Tomography for Characterizing Pulsatile Tinnitus Caused by Sigmoid Sinus Diverticulum with
Jie Zhang1, Quan-Liang Mao2, Fang-Jie Shen1
1Department of Radiology, Ningbo First Hospital, Ningbo Hospital, Zhejiang University, Ningbo, Zhejiang 315010, China.
Current Medical Imaging
|May 17, 2022
Summary
Dynamic volume CT effectively diagnoses pulsatile tinnitus linked to sigmoid sinus diverticulum (SSD) and bone defects. This imaging method reveals significant differences in bone defect size and blood flow between affected and unaffected ears.
Area of Science:
- Radiology
- Otolaryngology
- Neuroscience
Background:
- Pulsatile tinnitus can be caused by sigmoid sinus diverticulum (SSD) with associated bone defects.
- Accurate diagnosis is crucial for effective management.
Purpose of the Study:
- To investigate the diagnostic utility of dynamic volume computed tomography (CT) for pulsatile tinnitus stemming from SSD and bone defects.
Main Methods:
- Retrospective analysis of dynamic volume CT data from 35 patients with SSD.
- Evaluation of ear morphological parameters and blood perfusion (CBF, CBV, MTT).
- Comparison between tinnitus and asymptomatic sides.
Main Results:
- Larger bone defects and herniation of SSD into the mastoid were observed on the tinnitus side.
- Increased prevalence of transverse sinus stenosis, jugular bulb abnormalities, and venous sinus thrombosis on the tinnitus side.
- Significantly elevated CBF, CBV, and MTT on the tinnitus side.
Conclusions:
- Dynamic volume CT is an effective diagnostic tool for pulsatile tinnitus associated with SSD and bone defects.
- The imaging modality can identify key morphological and hemodynamic changes indicative of the condition.
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