title: [Dose comparison between pre and post operation of 125I seeds implantation guided by 3D print tamplate].
abstract: OBJECTIVE
  To compare the dose difference between pre and post operation of (125)I seeds implantation guided by 3D print tamplate and investigate the dose accuracy.
  
  
  METHODS
  From August 2015 to November 2015, a total of 9 patients were selected and underwent 3D print tamplate guided (125)I seeds implantation in Hebei General Hospital. All patients had been fixed as the position of operation and then performed CT scan. After preplan was designed, the 3D tamplates were printed. The tumors were punctured through needles holes predesigned. Another CT scan was used to confirm the locations of needles and then seeds were implanted into tumor according to preplan. Postplan was performed after the operation. The D90, V90, V100, V150 and seeds number pre and post operation were collected and compared.
  
  
  RESULTS
  The mean D90, V90, V100, V150 and seeds number preoperation was (7 684±3 279)cGy, 93.2%±0.8%, 89.8%±0.9%, 62.8%±4.7% and 58±17 respectively. The mean D90, V90, V100, V150 and seeds number postoperation was (7 531±3 523) cGy, 92.4%±2.0%, 88.0%±2.5%, 61.9%±5.3% and 56±17 respectively. The difference of all data between pre and post operation was not statistically significant (all P> 0.05).
  
  
  CONCLUSIONS
  The dose parameters in postplan show no difference compared with preplan. For the fixed tumor, 3D print tamplate guided seeds implantation may become an easy repeated and standard procedure.
authors.affiliation: Department of Oncology, Hebei General Hospital, Shijiazhuang 050051, China.
authors.forename: H T
authors.initials: HT
authors.lastname: Zhang
authors.forename: X M
authors.initials: XM
authors.lastname: Di
authors.forename: H M
authors.initials: HM
authors.lastname: Yu
authors.forename: X Z
authors.initials: XZ
authors.lastname: Zhao
authors.forename: L J
authors.initials: LJ
authors.lastname: Zhang
authors.forename: J X
authors.initials: JX
authors.lastname: Zhao
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: Z Z
authors.initials: ZZ
authors.lastname: Liu
authors.forename: A X
authors.initials: AX
authors.lastname: Sui
authors.forename: J
authors.initials: J
authors.lastname: Wang
mesh_terms: D001918:Brachytherapy; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D009339:Needles; D009369:Neoplasms / Q000532:radiotherapy*; D011184:Postoperative Period; D011879:Radiotherapy Dosage; D014057:Tomography, X-Ray Computed
chemical_list: D007457:Iodine Radioisotopes