Application of IMR Combined with O-MAR Technique to Inhibit Metal Artifacts After Cerebral Aneurysm Surgery
FU Yongchun1,ZHOU Yinan2,JIANG Bin3,CHEN Xuzhu1
1. Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China|2. Philips (China)
Investment Co., Ltd., Beijing 100026, China|3. Department of Neuroepidemiology, Beijing Institute of Neurosurgery, Beijing
Tiantan Hospital, Capital Medical University, Beijing 100070, China
Abstract:Objective To explore the efficacy of IMR combined with OMAR in the inhibition of metal artifact in craniocerebral postoperative examination. Methods A total of 60 patients who received plain head scan for reexamination after coil embolization of
intracranial aneurysms or after aneurysm clipping in our hospital were selected. After the scan,conventional raw data were abtained from the cranial top to the cranial base and the original data of the patient was reconstructed respectively in the IMR+O-MAR and
iDose4 thin layer. IDose4 reconstructed images were set as Group A, IMR+O-MAR reconstructed images were set as group B, and the layer thickness and layer spacing of the images were set as 1mm..Asenior radiographer measured the CT value and noise of the
standard variance (SD) value at 3 locations of the 2 groups of images tumor intermediate layer artifacts obvious area, compared respectively the SD values around the two groups of metal artifacts, compared the noise ratio (CNR), the pseudo-index (AI), the
maximum diameter of the pseudo-shadow|Then, two image diagnosticians who worked for more than 10 years independently subjectively graded 2 groups of images based on the shape of the metal implants and the discernment of the surrounding soft tissues.
Results Compared with idose4 group, the noise, maximum artifact diameter and AI of IMR+O-MAR group were significantly decreased (P<0.05), while the subjective image quality score and CNR were significantly increased (P<0.001). Conclusion The use
of IMR-O-MAR iterative reconstruction to inhibit metal artifacts technology can significantly reduce the effect of metal artifacts on the adjacent anatomical structure and surrounding normal tissues of intracranial aneurysms and improve the overall image quality.
付永春1,周一楠2,江滨3,陈绪珠1. IMR结合O-MAR技术抑制脑动脉瘤术后金属伪影的应用研究[J]. 中国医疗设备, 2020, 35(12): 87-90.
FU Yongchun1,ZHOU Yinan2,JIANG Bin3,CHEN Xuzhu1. Application of IMR Combined with O-MAR Technique to Inhibit Metal Artifacts After Cerebral Aneurysm Surgery. China Medical Devices, 2020, 35(12): 87-90.