The basic needle arrangement for a single plane implant in the Manchester system consists of what?

The basic needle arrangement for a single plane implant in the Manchester system involves a parallel array of needles across the area of the implant. This configuration is designed to ensure that the radioactive sources are evenly distributed and adequately cover the target volume, providing optimal dosimetry for the treatment area. By utilizing a parallel arrangement, this technique allows for consistent and precise placement of the sources, facilitating an even dose distribution while minimizing regions of underdosing or overdosing.

The Manchester system is particularly effective in brachytherapy, where it is crucial to control radiation distribution in the treated area. A parallel array aligns with the goals of maximizing the therapeutic effect while aiming to spare surrounding healthy tissues. This structured approach enhances treatment planning and delivery, making it an appropriate choice for medical professionals working within this dosimetry framework.