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Abstract
Ultrasound represent the initial imaging modality of choice for the assessment of palpable abnormalities of the parotid gland and also of suspected parotid calculus disease not only does it enable to demonstrate benign and malignant features of focal lesions , but in many cases the nature of underlying disease may also be suggested on the basis of us findings . Ultrasound is able to guide the need for further imaging (CT or MRI) in those lesions with sonographically malignant features or large messes whose extent is difficult to assess with ultrasound, particularly if deep lobe involvement is suspected. from this study we confirm the role of gray scale and Color Doppler Sonography imaging in evaluation the diseases of the parotid gland and establish criteria for the differentiation of benign and malignant tumors of the parotid gland using Color Doppler Sonography (CDS) and Pulsed Doppler Sonography (PDS). Our findings confirm that ultrasound can accurately determine the morphology of the majority of parotid gland tumors and can indicate the necessitColor Doppler can help y of CT/MRI imaging. to exclude malignancy when the RI is less than 0.8 and when the PI less than 1.8.