Localization accuracy of two electromagnetic tracking systems in prostate cancer radiotherapy: A comparison with fiducial marker based kilovoltage imaging

Accurate treatment localization is crucial part of modern radiotherapy. Its importance is emphasized in prostate radiotherapy as the prostate position is known to change relative to bony structures and skin surface between the fractions (interfraction motion) [1 –3] and during the treatment (intrafraction motion) [4–6]. The motion is mainly caused by variations in rectum and bladder filling and it can range up to 1–2 cm during the treatment course [7], intrafraction motion being generally smaller in extent, typically less than 5 mm [5,6].
Source: Physica Medica: European Journal of Medical Physics - Category: General Medicine Authors: Tags: Original paper Source Type: research