Longitudinal Scanning of the Parotid Gland: Color Doppler Flow Image

Scanning Method: Continuous longitudinal and transverse scan of the parotid gland region is performed with patient supine (posterior part of the face, inferior to the zygomatic arch, anterior and inferior to the exter nal auditory meatus, anterior to the mastoid pro cess, superficial to the masseter muscle, posterior to the ramus and angle of mandible); jugular lymph nodes should also be examined at the same time. Minimal pressure should be used to avoid influence of the blood signal.

Section Structure:None or a few spots of blood flow Doppler signal will appear in normal parotid gland parenchyma. External carotid artery may be shown running in the deep gland occasionally.

Parotid Artery Doppler — Normal Reference Table

Parameter	Normal Range / Finding	Abnormal / Suggestive of Pathology
Peak Systolic Velocity (PSV)	20 – 40 cm/s	> 40 cm/s → hyperemia, inflammation, tumor
End Diastolic Velocity (EDV)	5 – 15 cm/s	↑ with hyperemia; ↓ with obstruction
Resistive Index (RI)	0.6 – 0.8	< 0.6 → sialadenitis, Sjögren’s > 0.8 → tumor, obstruction
Color Doppler Pattern	Sparse, fine vascular signals; symmetric	Increased focal flow or hot spots → inflammation or tumor

Parotid Vein Doppler — Normal Reference Table

Parameter	Normal Range / Finding	Abnormal / Suggestive of Pathology
Venous Flow Velocity	5 – 15 cm/s	High velocity or turbulence → vascular lesion / fistula
Flow Pattern	Monophasic, low velocity, continuous	Reversal or disturbed flow → obstruction or abnormal shunting
Symmetry	Similar venous waveform on both sides	Asymmetry → local pathology or compression

Clinical Application Value: Increase of blood signals in all kinds of inflammation

Clinical Notes:

• In sialadenitis (acute/chronic): increased vascularity, RI often decreases (<0.6)
• In tumors (e.g., pleomorphic adenoma, Warthin’s tumor, malignancy): vascularity pattern changes, RI may be >0.8
• Sjogren’s syndrome: Heterogeneous echotexture with altered vascular distribution

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Parotid Color Doppler — Quiz (Longitudinal View)

पैरोटिड कलर डॉप्लर — क्विज़ (लम्बवत दृश्य)

10 MCQs — choose the best answer (A–D)

10 बहु-विकल्पीय प्रश्न — सर्वोत्तम उत्तर चुनें (A–D)
Created: Parotid Color Doppler MCQ — bilingual (EN/HI)