Feasibility Study of C-Arm X-Ray-Assisted Identification of
Implanted Gold Fiducial Marker in Prostate Cancer
NIU Xiangxin1, ZHAO Mingjuan2, TIAN Long1, HU Yimin3
1. Department of Medical Imaging, The First Affiliated Hospital of Hebei Northern University, Zhangjiakou Hebei 075000, China;
2. Department of Medical Imaging, Hebei General Hospital, Shijiazhuang Hebei 050000, China;
3. Department of Radiotherapy, Cancer Hospital of Chinese Academy of Medical Sciences, Beijing 100021, China
Abstract：Objective To study the feasibility of C-arm X-ray (CX) kV image in prostate cancer radiotherapy plan design based on MR
image for identification of implanted gold fiducial marker (GFM). Methods A total of 32 patients with prostate cancer who met the
inclusion and exclusion criteria were selected. First, CX image and MR-digitally reconstructured radiograph (MR-DRR) with GFM
in anterior-posterior direction were acquired. The center of GFM on two images was matched. Displacement in superior-inferior and
left-right direction and two-dimension space was calculated. Auxiliary identification for GFM on MR-DRR with CX was performed.
Then CT-digitally reconstructured radiograph (CT-DRR) with GFM in anterior-posterior direction was acquired and auxiliary
identification for GFM on MR-DRR was performed. Difference in all directions between two auxiliary identification methods was
statistically analyzed. Results Average value of displacement in superior-inferior and left-right direction and two-dimension space
was (0.91±0.85), (0.83±0.71) and (1.54±1.41) mm, respectively in CX-assisted identification, and (0.69±0.55), (0.53±0.46) and
(1.14±0.73) mm in CT-assisted identification. There was significant difference between two identification methods in all directions
(P<0.05). Conclusion Compared with CT, the accuracy of CX-assisted identification method is acceptable and has certain clinical
application value.
牛向欣1，赵明娟2，田龙1，胡逸民3. C臂X线辅助前列腺癌内置金标志物辨识的可行性研究[J]. 中国医疗设备, 2022, 37(6): 85-88.
NIU Xiangxin1, ZHAO Mingjuan2, TIAN Long1, HU Yimin3. Feasibility Study of C-Arm X-Ray-Assisted Identification of
Implanted Gold Fiducial Marker in Prostate Cancer. China Medical Devices, 2022, 37(6): 85-88.
