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| Diagnostic Value of MRI Fast Imaging Sequence for Placenta Accreta in Middle and Late Pregnancy |
| YI Yu-si, HUANG Feng, YU Yi-long |
| Hunan Provincial People's Hospital,Changsha 410005 China |
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Abstract 【Objective】 To investigate the clinical value of MRI in the diagnosis of placenta accreta in middle and late pregnancy. 【Methods】 The clinical data of 35 patients with suspected placenta accreta admitted from April 2014 to August 2017 in our hospital were selected. MRI scan was performed with half Fourier single excitation and fast spin echo HASTE fat to suppress T2WI sequence so as to perform sagittal, transverse and coronal scans.The coincidence rate of MRI in diagnosis of placenta accreta with clinical operation and pathological diagnosis was analyzed.【Results】 (1) Among 24 cases of placental adhesion, 19 cases were confirmed by clinical operation and pathology, including 12 cases of placental adhesion on anterior wall, 7 cases of placental adhesion on posterior wall, and 5 cases were misdiagnosed as placental adhesions.(2) In 8 cases of placenta accreta, the placental base was uneven, and the placental base was mixed with the parenchyma with thick stripe hypotensive signal.The boundary between the placenta and the uterus was blurred. Middle and High implanted lesions were present in the myometrium of the uterus with low signal T2WI.(3) There were 3 cases of placental penetration, 2 of which penetrated the anterior and inferior wall of the uterus and invaded the bladder.A local disruption of the myometrium of the uterus was present.The moderately high signal placental tissue invades from the interruption.The placental tissue was fused with the myometrium of the uterus.The boundary between the serous layer of the uterus and the bladder was blurred."Tent-like" soft tissue signals protruded in the bladder cavity.One case penetrated the uterus backward.The fat gap in the rectocele disapperared.A slightly higher signal of T2WI can be seen in the serous layer of the upper rectum.【Conclusion】 The MRl rapid sequence has a great advantage in the diagnosis of placenta accreta, especially for the high diagnostic accuracy of the increta placenta and the penetrating placenta.
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Received: 22 December 2017
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2019, Vol. 36 
