Indra J. Das, PhD

Target coverage in lung SBRT is influenced by tumor size, PTV margin, and local lung density. This study investigates target dose coverage in low‑density lung as a function of PTV margins and lung density.

Ablative hypofractionated radiotherapy(AHRT), including stereotactic body radiotherapy(SBRT) and stereotactic radiosurgery(SRS), achieves tumor control that is not reliably predicted by Linear–Quadratic (LQ) model. Clinical observations of failure of BED equi...

To evaluate the accuracy of the Analytical Anisotropic Algorithm (AAA) and Acuros XB (AXB) implemented in the Eclipse treatment planning system for small-field dosimetry in low-density lung, with emphasis on their performance in lung stereotactic body radiati...

Accurate small‑field dosimetry is strongly influenced by detector volume averaging, density effects, and perturbations. Solid‑state detectors such as microSilicon and microdiamond are widely used due to minimal correction requirements; however, limited data e...

Large variation up to 8% in field output factor (FOF) among various investigators has been reported. This is critical for modern radiotherapy techniques. Field definition based on FWHM (Sclin) and S (jaw based) has been used but debated. This study investigat...

Lung stereotactic body radiotherapy (SBRT) is now standard of care for oligometastatic and small pulmonary lesions, where very small radiation fields are used. Although inhomogeneity correction algorithms have been well validated for larger fields, limited da...

Small field dosimetry has been challenging without reasonable data. However, we've reached the point that the Monte Carlo approach can play a primary role in providing comprehensive beam data (including field output factors(FOFs), %dd and dose profiles, etc.)...

Diagnostic and Interventional Radiology Physics