ArticleProceedings of SPIE--the International Society for Optical Engineering2016
A system to track skin dose for neuro-interventional cone-beam computed tomography (CBCT).
Article in Proceedings of SPIE--the International Society for Optical Engineering, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed.
- Calculation of the entrance skin dose distribution for fluoroscopically guided interventions using a pencil beam backscatter model.Journal of medical imaging (Bellingham, Wash.) · 2017Article
- Monte Carlo investigation of backscatter point spread function for X-ray imaging examinations.Proceedings of SPIE--the International Society for Optical Engineering · 2017Article
- Organ and effective dose reduction for region-of-interest (ROI) CBCT and fluoroscopy.Proceedings of SPIE--the International Society for Optical Engineering · 2017Article
- Skin dose mapping for non-uniform x-ray fields using a backscatter point spread function.Proceedings of SPIE--the International Society for Optical Engineering · 2017Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
The skin-dose tracking system (DTS) provides a color-coded illustration of the cumulative skin-dose distribution on a closely-matching 3D graphic of the patient during fluoroscopic interventions in real-time for immediate feedback to the interventionist. The skin-dose tracking utility of DTS has been extended to include cone-beam computed tomography (CBCT) of neurointerventions. While the DTS was developed to track the entrance skin dose including backscatter, a significant part of the dose in CBCT is contributed by exit primary radiation and scatter due to the many overlapping projections during the rotational scan. The variation of backscatter inside and outside the collimated beam was measured with radiochromic film and a curve was fit to obtain a scatter spread function that could be applied in the DTS. Likewise, the exit dose distribution was measured with radiochromic film for a single projection and a correction factor was determined as a function of path length through the head. Both of these sources of skin dose are added for every projection in the CBCT scan to obtain a total dose mapping over the patient graphic. Results show the backscatter to follow a sigmoidal falloff near the edge of the beam, extending outside the beam as far as 8 cm. The exit dose measured for a cylindrical CTDI phantom was nearly 10 % of the entrance peak skin dose for the central ray. The dose mapping performed by the DTS for a CBCT scan was compared to that measured with radiochromic film and a CTDI-head phantom with good agreement.
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Registered trials
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