J Shanghai Jiaotong Univ Sci ›› 2021, Vol. 26 ›› Issue (3): 306-311.doi: 10.1007/s12204-021-2297-1

• Medical 3D Printing and Personalised Medicine • Previous Articles     Next Articles

Image Registration Technique for Assessing the Accuracy of  Intraoperative Osteotomy for Pelvic Tumors by 3D-Printed Patient-Specific Templates

Image Registration Technique for Assessing the Accuracy of  Intraoperative Osteotomy for Pelvic Tumors by 3D-Printed Patient-Specific Templates

QU Yanga‡ (曲扬), YAN Mengningb‡ (严孟宁), LI Xiaomina (李小敏), WU Binga (吴兵), LIU Siyua (柳思宇), WANG Liaob (王燎), WU Wenb(武文), AI Songtaoa(艾松涛)   

  1. (a. Department of Radiology; b. Shanghai Key Laboratory of Orthopaedic Implants; Department of Orthopaedics,
    Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China)
  2. (a. Department of Radiology; b. Shanghai Key Laboratory of Orthopaedic Implants; Department of Orthopaedics,
    Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China)
  • Online:2021-06-28 Published:2021-06-02
  • Contact: WU Wen(武文), AI Songtao(艾松涛) E-mail:13761003720@163.com, ai.songtao@qq.com
  • Supported by:
    the Technology Project of Shanghai Science
    and Technology Commission (Nos. 19441902700
    and 18441903100), the Clinical Research Plan of SHDC
    (No. SHDC2020CR3083B), and the Shanghai Municipal
    Education Commission (No. 20152221)

Abstract: The study aimed to explore the feasibility of an image registration technique for assessing the accuracy  of intraoperative osteotomy of pelvic tumors by 3-dimensional (3D)-printed patient-specific templates. Patients  with malignant pelvic tumors who were admitted to our hospital between March 2014 and December 2020 were  retrospectively enrolled. Patients underwent hemi-pelvic resection and reconstruction by 3D-printed individualized  prostheses. The registration between the designed model and the postoperative segmented model of the prosthesis  was used to obtain the intraoperative osteotomy plane and reduce metal artifacts in postoperative computed  tomography (CT) images. The distance and angle between the planned and actual osteotomy planes were then  used to assess the accuracy of the intraoperative osteotomy. Eight patients with 13 osteotomy planes were  enrolled, including four males and four females. The median age at the time of imaging examination was 44 years  (range, 33—54 years). All intraoperative osteotomy planes were assessed successfully. The mean distance between  the planned and true intraoperative osteotomy planes was ?0.69 cm (?7.5—7.35 cm), and the mean angle was  6.57?±3.36?(1.05?—11.88?). This new assessment method of registering the designed model and the postoperative  CT segmented model of the prosthesis may be used to assess the accuracy of intraoperative osteotomy for pelvic  tumors, using 3D printed patient-specific templates.

Key words: pelvic tumor, image registration, 3D-printed patient-specific template, intraoperative osteotomy

摘要: The study aimed to explore the feasibility of an image registration technique for assessing the accuracy  of intraoperative osteotomy of pelvic tumors by 3-dimensional (3D)-printed patient-specific templates. Patients  with malignant pelvic tumors who were admitted to our hospital between March 2014 and December 2020 were  retrospectively enrolled. Patients underwent hemi-pelvic resection and reconstruction by 3D-printed individualized  prostheses. The registration between the designed model and the postoperative segmented model of the prosthesis  was used to obtain the intraoperative osteotomy plane and reduce metal artifacts in postoperative computed  tomography (CT) images. The distance and angle between the planned and actual osteotomy planes were then  used to assess the accuracy of the intraoperative osteotomy. Eight patients with 13 osteotomy planes were  enrolled, including four males and four females. The median age at the time of imaging examination was 44 years  (range, 33—54 years). All intraoperative osteotomy planes were assessed successfully. The mean distance between  the planned and true intraoperative osteotomy planes was ?0.69 cm (?7.5—7.35 cm), and the mean angle was  6.57?±3.36?(1.05?—11.88?). This new assessment method of registering the designed model and the postoperative  CT segmented model of the prosthesis may be used to assess the accuracy of intraoperative osteotomy for pelvic  tumors, using 3D printed patient-specific templates.

关键词: pelvic tumor, image registration, 3D-printed patient-specific template, intraoperative osteotomy

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