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Published on: August 14, 2019
Read-out segmented echo planar diffusion imaging of the female pelvis-utility in endometrial carcinoma-a preliminary
Adarsh Ghosh1,2, Tulika Singh1, Veenu Singla1
11 Department of Radiodiagnosis and Imaging, Postgraduate Institute of Medical Education and Research , Chandigarh , India.
Objective::
Susceptibility artefacts from bones and bowel, geometric distortion makes diffusion imaging of the pelvis difficult. We discuss the difficulties of single-shot-echo-planar (ss-ep) DWI and evaluate a new diffusion-weighted imaging (DWI) technique-readout segmented echo planar (rs-ep) DWI in endometrial carcinoma and discuss the imaging physics.
Methods::
Institute review board approval was obtained and five consecutive patients underwent both rs-ep and ss-ep-DWI of the female pelvis and two radiologists compared the images. ROIs were drawn on the endometrium on the b400 images-signal to noise was calculated and compared using F test.
Results::
The rs-ep-DWI had less imaging artefacts, less bowel-related susceptibility and geometric distortion compared to ss-ep-DWI. There was statistically significant greater SNR in ss-ep-DWI compared to rs-ep-DWI. This resulted in increased graininess of the readout segmented diffusion images. Artefacts in SS-EPI-DTI may make fibre tracking fallacious and rs-ep DTI may have fewer artefacts.
Conclusion::
rs-ep-DWI is a new imaging arsenal in imaging of the female pelvis in general; however further reduction in imaging time and improvement in signal to noise may be desirable.
Advances In Knowlegde::
rs-ep-DWI affords lesser imaging artefacts from susceptibility and geometric distortion; at a higher time dividend and may find a place in oncological imaging.
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