User requirements on CT-based computed dose planning systems in radiation therapy

Dahlin, H.; Lamm, Inger-Lena; Landberg, T.; Levernes, S.; Ulsø, N.

doi:10.1016/0010-468x(83)90074-0

Cited by 10 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[10][11][12][13][14][15] A DD distribution can be displayed identifying the regions where calculated depth distributions show distinct disagreement with measured data. In general, a small spatial error in high depth gradient regions may result in a large difference between measured and calculated depths.…”

Section: Iid Methods Of Comparison With the Reference Depth Mapmentioning

confidence: 99%

Computerized tomography-based quality assurance tool for proton range compensators

et al. 2008

View full text Add to dashboard Cite

The authors have developed an automatic quality assurance method based on computerized tomography (CT) data for physically manufactured proton range compensators. Eight range compensators used for proton therapy at their institution were scanned using CT and their depth distributions were compared with data provided by a proton treatment planning system (TPS). The depth difference (DD), distance to agreement (DTA), and a composite analysis (CA) indicating regions that passed either of the tests were used for depth verification. When the tolerance limits were set at 3 mm for DD and 1 mm for DTA, the average percentages of points exceeding the acceptance criteria for DD, DTA, and CA for the eight compensators were 9.0%, 5.3% and 3.2%, respectively. In general, the percentages of points exceeding the acceptance criteria were much higher in DD than in DTA analysis and mismatch of depth was greater in regions with high depth gradients. This is considered to arise mainly because of systematic errors such as the physical size of the drill, slight bending or slipping of the drill bit near high gradient regions, the limit of CT resolution, and the uncertainty in CT number. When the tolerance limit of DTA was increased from 1 to 2 mm, the average percentage of points exceeding the acceptance criteria for DTA was reduced from 5.3% to 0.9%. Their results show that depth comparison of proton range compensators based on CT images can provide more systematic data than does the current method, in which a representative group of drill points is measured manually.

show abstract

Section: Iid Methods Of Comparison With the Reference Depth Mapmentioning

confidence: 99%

Computerized tomography-based quality assurance tool for proton range compensators

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Using the template registration methods in RIT113 software, the plan-film fiducial points and their respective template points were registered unambiguously. The qualitative comparisons such as overlaid isodoses, profiles, and quantitative comparisons, i.e., distance to agreement (DTA) 29 and Gamma index 30,31 analyses were performed to check the consistency between calculated and measured dose distributions. Figure 4 shows the sensitometric response of EDR2 and EBT films in terms of OD vs. delivered dose.…”

Section: Imrt Dose Distribution Verificationmentioning

confidence: 99%

Comparison of Kodak EDR2 and Gafchromic EBT film for intensity-modulated radiation therapy dose distribution verification

et al. 2006

View full text Add to dashboard Cite

“…As part of a common project on computerized treatment planning, a Nordic group in 1983 pub lished the "User requirements..." (14). This resulted in a common Nordic project, CART (computeraided radiation therapy), in which the requirements of an integrated system were analysed.…”

Section: The 1980smentioning

confidence: 99%

Radiation Physics in Acta Radiologica

Walstam

1996

Acta Radiol

View full text Add to dashboard Cite

show abstract

User requirements on CT-based computed dose planning systems in radiation therapy

Cited by 10 publications

References 8 publications

Computerized tomography-based quality assurance tool for proton range compensators

Computerized tomography-based quality assurance tool for proton range compensators

Comparison of Kodak EDR2 and Gafchromic EBT film for intensity-modulated radiation therapy dose distribution verification

Radiation Physics in Acta Radiologica

Contact Info

Product

Resources

About