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Bauer CJ, Teske H, Walter A, Hoegen P, Adeberg S, Debus J, Jaekel O, Giske K. Biofidelic image registration for head and neck region utilizing an in-silico articulated skeleton as a transformation model. Phys Med Biol 2023; 68. [PMID: 36972617 DOI: 10.1088/1361-6560/acc7f1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/27/2023] [Indexed: 03/29/2023]
Abstract
OBJECTIVE We propose an integration scheme for a biomechanical motion model into a deformable image registration. We demonstrate its accuracy and reproducibility for adaptive radiation therapy in the head and neck region.
Approach: The novel registration scheme for the bony structures in the head and neck regions is based on a previously developed articulated kinematic skeleton model. The realized iterative single-bone optimization process directly triggers posture changes of the articulated skeleton, exchanging the transformation model within the deformable image registration process.
Accuracy in terms of target registration errors in the bones is evaluated for 18 vector fields of three patients between each planning CT and six fraction CT scans distributed along the treatment course.
Main results: The median of target registration error distribution of the landmark pairs is 1.4 ± 0.3 mm. This is sufficient accuracy for adaptive radiation therapy. The registration performs equally well for all three patients and no degradation of the registration accuracy can be observed throughout the treatment.
Significance: Deformable image registration, despite its known residual uncertainties, is until now the tool of choice towards online re-planning automation. By introducing a biofidelic motion model into the optimization, we provide a viable way towards an in-build quality assurance.
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Affiliation(s)
- Cornelius J Bauer
- Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Hendrik Teske
- Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Alexandra Walter
- Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Philipp Hoegen
- Heidelberg Institute for Radiation Oncology (HIRO), NCT, NCRO, DKTZ, Im Neuenheimer Feld 280, Heidelberg, 69120, GERMANY
| | - Sebastian Adeberg
- Heidelberg Institute for Radiation Oncology (HIRO), NCT, NCRO, DKTZ, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Juergen Debus
- Heidelberg Institute for Radiation Oncology (HIRO), NCT, NCRO, DKTZ, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Oliver Jaekel
- Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
| | - Kristina Giske
- Department of Medical Physics in Radiation Oncology, German Cancer Research Center, Im Neunheimer Feld 280, Heidelberg, Baden-Württemberg, 69120, GERMANY
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