Incorporation of functional status into dose-volume analysis

Area of Science:

• Radiation Oncology
• Medical Imaging
• Quantitative Biology

Background:

• Dose-volume histograms (DVH) are standard for analyzing 3D radiation dose distributions.
• DVH simplifies complex data but discards spatial information and assumes functional homogeneity.
• This limits accurate prediction of treatment control and complications.

Purpose of the Study:

• To introduce the dose-function histogram (DFH) as an extension of the DVH.
• To incorporate quantitative 3D functional information into treatment plan evaluation.
• To address the limitations of DVH in functionally heterogeneous tissues.

Main Methods:

• Developed the concept of the dose-function histogram (DFH).
• Utilized SPECT imaging to assess functional status of irradiated lung tissue.
• Integrated functional data with dose distribution information.

Main Results:

• The DFH explicitly includes quantitative 3D functional information, unlike traditional DVH.
• Demonstrated the application of DFH using SPECT imaging in irradiated lung.
• Proposed a method to overcome DVH's shortcomings in heterogeneous functional volumes.

Conclusions:

• The DFH offers a more comprehensive approach to radiation therapy analysis.
• Integrating functional imaging data with dose metrics improves treatment evaluation.
• DFH has the potential to enhance the estimation of treatment control and complication probabilities.