Segmental analysis of respiratory liver motion in patients with and without a history of abdominal surgery
| Autor: | Tomoyasu Kumano, Sayuri Bou, Yasuhiro Shimizu, Shigeyuki Takamatsu, Toshifumi Gabata, Kazutaka Yamamoto, Yoshikazu Maeda, Hiroyasu Tamamura, Makoto Sasaki |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Segmental analysis Movement medicine.medical_treatment Computed tomography 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Proton Therapy Humans Medicine Radiology Nuclear Medicine and imaging In patient Four-Dimensional Computed Tomography Respiratory system Aged Retrospective Studies Aged 80 and over medicine.diagnostic_test business.industry Respiration Liver segment Respiratory motion Middle Aged Radiation therapy Liver Abdominal Neoplasms 030220 oncology & carcinogenesis Female business Nuclear medicine Abdominal surgery |
| Zdroj: | Japanese Journal of Radiology. 36:511-518 |
| ISSN: | 1867-108X 1867-1071 |
| DOI: | 10.1007/s11604-018-0750-3 |
| Popis: | The purpose of this study was to analyze the respiratory motion of each segment of the liver in patients with or without a history of abdominal surgery using four-dimensional computed tomography. In total, 57 patients treated for abdominal tumors using proton beam therapy were enrolled. Eighteen patients had a history of abdominal surgery and 39 did not. The positions of clearly demarcated, high-density regions in the liver were measured as evaluation points with which to quantify the motion of each liver segment according to the Couinaud classification. In total, 218 evaluation points were analyzed. Comparison of differences in the motion of individual liver segments showed that among patients without a history of surgery, the maximum was 29.0 (7.2–42.1) mm in S6 and the minimum was 15.1 (10.6–19.3) mm in S4. Among patients with a history of surgery, the maximum was 28.0 (9.0–37.4) mm in S7 and the minimum was 6.3 (4.1–9.3) mm in S3. The distances and directions of respiratory motion differed for each liver segment, and a history of abdominal surgery reduced the respiratory motion of the liver. It is necessary to selectively use the internal margin setting. |
| Databáze: | OpenAIRE |
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