Motion compensated digital tomosynthesis

Reijden, A. Van der; Herk, Marcel van; Sonke, Jan‐Jakob

doi:10.1016/j.radonc.2013.09.002

Cited by 11 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With DTS, multiple projection images acquired over a short gantry arc are combined, enhancing the target by removing overlying structures and reducing random noise. The use of DTS for lung tumor position verification in radiotherapy has mainly been investigated for patient setup purposes and moving lung tumors (Santoro et al 2010, Speidel et al 2012, van der Reijden et al 2013, van Sörnsen de Koste 2013, Park et al 2014. For near-real-time positional verification of lung tumors treated in free-breathing, DTS is not an optimal solution because the tumor position on the projection images used for the DTS image will differ due to differences in breathing phase (van Sörnsen de Koste et al 2013).…”

mentioning

confidence: 99%

Markerless positional verification using template matching and triangulation of kV images acquired during irradiation for lung tumors treated in breath-hold

et al. 2018

View full text Add to dashboard Cite

Lung tumors treated in breath-hold are subject to inter- and intra-breath-hold variations, which makes tumor position monitoring during each breath-hold important. A markerless technique is desirable, but limited tumor visibility on kV images makes this challenging. We evaluated if template matching + triangulation of kV projection images acquired during breath-hold stereotactic treatments could determine 3D tumor position. Band-pass filtering and/or digital tomosynthesis (DTS) were used as image pre-filtering/enhancement techniques. On-board kV images continuously acquired during volumetric modulated arc irradiation of (i) a 3D-printed anthropomorphic thorax phantom with three lung tumors (n = 6 stationary datasets, n = 2 gradually moving), and (ii) four patients (13 datasets) were analyzed. 2D reference templates (filtered DRRs) were created from planning CT data. Normalized cross-correlation was used for 2D matching between templates and pre-filtered/enhanced kV images. For 3D verification, each registration was triangulated with multiple previous registrations. Generally applicable image processing/algorithm settings for lung tumors in breath-hold were identified. For the stationary phantom, the interquartile range of the 3D position vector was on average 0.25 mm for 12° DTS + band-pass filtering (average detected positions in 2D = 99.7%, 3D = 96.1%, and 3D excluding first 12° due to triangulation angle = 99.9%) compared to 0.81 mm for band-pass filtering only (55.8/52.9/55.0%). For the moving phantom, RMS errors for the lateral/longitudinal/vertical direction after 12° DTS + band-pass filtering were 1.5/0.4/1.1 mm and 2.2/0.3/3.2 mm. For the clinical data, 2D position was determined for at least 93% of each dataset and 3D position excluding first 12° for at least 82% of each dataset using 12° DTS + band-pass filtering. Template matching + triangulation using DTS + band-pass filtered images could accurately determine the position of stationary lung tumors. However, triangulation was less accurate/reliable for targets with continuous, gradual displacement in the lateral and vertical directions. This technique is therefore currently most suited to detect/monitor offsets occurring between initial setup and the start of treatment, inter-breath-hold variations, and tumors with predominantly longitudinal motion.

show abstract

mentioning

confidence: 99%

Markerless positional verification using template matching and triangulation of kV images acquired during irradiation for lung tumors treated in breath-hold

et al. 2018

View full text Add to dashboard Cite

show abstract

“… 9 Tomosynthesis is a promising technique where 3D images can be reconstructed over a limited range of acquisition angles ( i.e. a short acquisition time): 10 , 11 when it becomes clinically available, it would offer a pragmatic way of monitoring the position of the target during treatment delivery. Tumour motion tracking for coping with intrafraction motion has been commercially available for two decades.…”

Section: Commentarymentioning

confidence: 99%

The role of technology in clinical trials using stereotactic body radiotherapy

Aznar

Romero

Heijmen

2017

The British Journal of Radiology

View full text Add to dashboard Cite

Stereotactic body radiotherapy is a highly technology-driven treatment modality. The wider availability of in-room imaging and advanced radiotherapy delivery techniques has led to more institutions offering stereotactic ablative therapy (SABR). While some technological challenges remain, the crucial point for the next generation of SABR clinical trials is that today's technology is used correctly and close to its optimal potential for accuracy. The credentialing procedure of SABR needs to be extensive, but this investment will benefit the trial itself, the patients and the professionals involved.

show abstract

“…for dosimetry), specific reconstruction strategies have been proposed in the literature, see e.g. [39,73].…”

Section: A View On X-ray Micro-tomographymentioning

confidence: 99%

“…Iterative algorithms in (ii) are suggested, for instance, when a limited number of projections (relevant to a limited angle of view) are available. These algorithms are initialized with an attempt estimate of the attenuation map [73,86]. By computing residuals between the projections predicted from this initial estimate and the experimental ones, the estimated attenuations are iteratively updated.…”

Section: A View On X-ray Micro-tomographymentioning

confidence: 99%

X-ray Microtomography under Loading and 3D-Volume Digital Image Correlation. A Review

Fedele

Ciani

Fiori

2014

Fundamenta Informaticae

View full text Add to dashboard Cite

In this review paper the synergistic combination of X-ray microtomography, in situ mechanical tests on material samples and full-field kinematic measurements by 3D-Volume Digital Image Correlation is discussed. First, basic features are outlined, concerning X-ray microtomography by either laboratory sources or synchrotron radiation. The main equations for 3D-Volume Digital Image Correlation are then presented, and different provisions regularizing the ill-posed problem of motion estimation are outlined. Thereafter, a survey of the state of the art is provided, with reference to a variety of biological and engineering materials. Limitations and perspectives of the proposed methodology in diverse applications are highlighted. The rapid growth of this research topic is emphasized, due to the truly multi-disciplinary vocation, the synergy between algorithmic and technological solutions, a fusion of experiments and numerical methods.

show abstract

Motion compensated digital tomosynthesis

Cited by 11 publications

References 22 publications

Markerless positional verification using template matching and triangulation of kV images acquired during irradiation for lung tumors treated in breath-hold

Markerless positional verification using template matching and triangulation of kV images acquired during irradiation for lung tumors treated in breath-hold

The role of technology in clinical trials using stereotactic body radiotherapy

X-ray Microtomography under Loading and 3D-Volume Digital Image Correlation. A Review

Contact Info

Product

Resources

About