Digitally reconstructed radiographs from abdominal CT scans as a new tool for radiotherapy planning

• Verfasst von: Bahner, Malte Leonardo [VerfasserIn]
• Verfasst von: Debus, Jürgen [VerfasserIn]
• Verfasst von: Zabel-du Bois, Angelika [VerfasserIn]
• Verfasst von: Levegrün, Sabine [VerfasserIn]
• Verfasst von: Kaick, Gerhard van [VerfasserIn]
• Titel: Digitally reconstructed radiographs from abdominal CT scans as a new tool for radiotherapy planning
• Verf.angabe: M.L. Bahner, J. Debus, A. Zabel, S. Levegrun, G. Van Kaick
• Jahr: 1999
• Umfang: 5 S.
• Fussnoten: Gesehen am 18.02.2021
• Titel Quelle: Enthalten in: Investigative radiology
• Ort Quelle: Philadelphia, Pa. : Lippincott Williams & Wilkins, 1966
• Jahr Quelle: 1999
• Band/Heft Quelle: 34(1999), 10, Seite 643-647
• ISSN Quelle: 1536-0210
• DOI: doi:10.1097/00004424-199910000-00006
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1748621432

Abstract

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.