Abstract: Disclosed herein are methods and systems for identifying the location of a target region using a tumor identification (ID) profile. A tumor ID profile includes identification parameters that characterize the target region. The tumor ID profile may be used to facilitate the identification of multiple target regions and to evaluate whether it is safe to deliver radiation to the target regions at their updated locations. Also disclosed herein are methods for analyzing a dose distribution to a target region by generating a bounded dose volume histogram (bDVH) based on gamma criteria comprising a distance-to-agreement (DTA) criterion and a dose difference (DD) criterion. In one variation, a gamma-derived bDVH is used in a method for selecting gamma criteria values for evaluating a radiotherapy treatment plan.

Abstract: Phantoms for use in calibrating a dual energy imaging system and methods for their use. The phantoms include a body having at least first and second portions arranged in a through-thickness direction of the body. The first portion defines an anterior surface of the body and contains a first material simulating soft tissue and a second material simulating bone. The second portion contains a third material simulating lung tissue and at least a first object embedded in the third material and formed of a fourth material simulating tumor tissue. The first and second portions of the body are configured such that the second material in the first portion superimposes the first object in the second portion in the through-thickness direction of the body relative to the anterior surface thereof.

Abstract: Phantoms for use in calibrating a dual energy imaging system and methods for their use. The phantoms include a body having at least first and second portions arranged in a through-thickness direction of the body. The first portion defines an anterior surface of the body and contains a first material simulating soft tissue and a second material simulating bone. The second portion contains a third material simulating lung tissue and at least a first object embedded in the third material and formed of a fourth material simulating tumor tissue. The first and second portions of the body are configured such that the second material in the first portion superimposes the first object in the second portion in the through-thickness direction of the body relative to the anterior surface thereof.