Digitally reconstructed radiographs from abdominal CT scans as a new tool for radiotherapy planning
OBJECTIVE. - Abdominal extended field radiotherapy requires exact field shaping. Conventional treatment planning is difficult to adapt to individual anatomy, whereas three-dimensional planning is time-consuming. The authors introduce a method with digitally reconstructed radiographs of spir...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
1999
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| In: |
Investigative radiology
Year: 1999, Volume: 34, Issue: 10, Pages: 643-647 |
| ISSN: | 1536-0210 |
| DOI: | 10.1097/00004424-199910000-00006 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://journals.lww.com/investigativeradiology/Fulltext/1999/10000/Digitally_Reconstructed_Radiographs_From_Abdominal.6.aspx Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1097/00004424-199910000-00006 
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| Author Notes: | M.L. Bahner, J. Debus, A. Zabel, S. Levegrun, G. Van Kaick |
| Summary: | OBJECTIVE. - Abdominal extended field radiotherapy requires exact field shaping. Conventional treatment planning is difficult to adapt to individual anatomy, whereas three-dimensional planning is time-consuming. The authors introduce a method with digitally reconstructed radiographs of spiral CT data to facilitate radiotherapy planning. - METHODS. - Twenty-two patients underwent imaging with a standardized CT protocol, and digitally reconstructed radiographs were calculated in central beam projection using a maximum intensity projection algorithm (MIP-DRR). For comparison, the expected error from parallel projection was calculated depending on object thickness and field length. - RESULTS. - The contrast-enhanced protocol used in spiral CT produces a good rendition of all relevant structures. The resulting MIP images have a geometry identical to standard simulation films and to the linear accelerator, whereas standard MIPs with parallel projection show significant distortion compared to the treatment process. - CONCLUSIONS. - Because of the integration of the geometry of the radiotherapy treatment, the described central beam projection method might be used as a new tool for abdominal radiotherapy planning. The CT protocol offers sufficient contrast enhancement in all relevant structures and provides all necessary anatomic information for individual beam shaping. |
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| Item Description: | Gesehen am 18.02.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1536-0210 |
| DOI: | 10.1097/00004424-199910000-00006 |