The aim of this study was to compare a fat-suppressed T2-weighted PROPELLER (T2W-PROPELLER) sequence with a fat-suppressed T2W-FSE sequence in the oral and maxillofacial regions with respect to the evaluation of the presence of motion artifacts caused by mandibular movements.įifty-six healthy adult volunteers (34 males, 22 females median age, 27 years age range, 24–50 years) were enrolled in this prospective study. In addition, eliminating fat signal using fat-suppression techniques can increase the value of T2W-FSE sequences, as fat has a high signal intensity on these images. For this reason, T2-weighted fast spin-echo (T2W-FSE) sequences are frequently used in clinical practice. This can lead to the degradation of images as a result of motion. Although T2-weighted spin-echo sequences are extremely sensitive for the detection of pathologic conditions, their relatively long acquisition times are a disadvantage. We hypothesized that the PROPELLER technique might be effective in reducing motion artifacts caused by mandibular movements on MR images in the oral and maxillofacial regions. Furthermore, a broad spectrum of artifacts caused by the pulsatile flow of vessels and the cerebrospinal fluid (CSF), swallowing or tongue movement can also occur, even in cooperative patients.

These movements result in motion-induced “ghosting” artifacts and reduce the diagnostic image quality in the target regions. We sometimes encounter patients in clinical practice who suffer from involuntary movement of the jaw, mouth or tongue, such as those with oral dyskinesia. However, to our knowledge, there have been no reports of the application of the PROPELLER technique to the oral and maxillofacial regions. Clinical applications have shown the benefit of the PROPELLER technique for brain, ,, , ], neck, cervical spine, abdomen, , ], lumber spine, shoulder, and knee MR imaging. The periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) technique enables motion correction using data acquired at the k-space center by every blade.

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