What is the measured patient thickness along the CAX in an isocentric treatment with the given parameters?

In an isocentric treatment, determining the patient's thickness along the central axis (CAX) is crucial for accurate dose delivery. The measured patient thickness refers to the actual distance between the skin surface and the point of interest along the CAX. Various factors can influence this measurement, such as the patient’s anatomy and positioning. Typically, clinicians will use imaging techniques or physical measurements to ascertain this thickness.

In this scenario, the chosen answer indicates that the measured thickness is 28 cm along the CAX. This likely aligns with the parameters set in the question, suggesting that this thickness provides optimal conditions for delivering the prescribed dose accurately while considering factors such as beam divergence and tissue density in the treatment planning. Accurate measurement along the CAX ensures that the dose distribution is precisely targeted, minimizing exposure to surrounding healthy tissues and optimizing treatment effectiveness.

Understanding the implications of the chosen thickness is essential for effective dosimetry, as it directly impacts the calculation of dose distribution and treatment planning.