الفهرس 
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Abstract
Diffusion weighted imaging is a recent functional imaging modality based on water molecules motion within the tissues , that differs according to the cellular component and activity of each one. Upon this idea , images are produced with contrast between various different tissue.
Diffusion-weighted MR imaging provides important new information noninvasively. This unique modality is helpful in initial staging of known malignancies, differentiating benign from malignant lesions, assessing treatment response, and determining the presence of disease recurrence .
High-quality diffusion-weighted MR imaging of the entire pelvis can now be performed as part of a gynecologic examination without greatly increasing total imaging time.
To ensure accuracy, it is important to be aware of the potential pitfalls of diffusion-weighted MR imaging and to review findings in conjunction with findings obtained with anatomic sequences.
the combination of DWI and conventional MRI identified additional sites of pelvic tumors and improved image interpretation.
With conventional MRI, DWI and ADC findings provide additional information in patients with gynecological diseases, most of female pelvic tumors gives low ADC value , yet further studies about DWI in assessment of lymph nodes are needed.
Additional advantages of DWI include its completely noninvasive nature and its cost effectiveness , DWI does not involve radiation exposure, the oral or intravenous administration of contrast material, and does not elicit patient discomfort.
DWI can be easily added to MR study protocols and loses no time to the injection of contrast material. DWI may play an important role in the diagnosis and follow-up of patients with gynecological diseases.
Increasing familiarity with ADC calculation and manipulation software, including the ability to fuse anatomic and diffusion data, will allow radiologists to gain confidence and thus to provide new information to physicians who are caring for women with known or suspected gynecologic malignancies.