When dealing with brachytherapy, a form of internal radiation treatment that places a radioactive source directly inside or next to a tumor. Also known as internal radiotherapy, it allows high doses to target tissue while sparing surrounding organs. brachytherapy is part of radiation therapy, the broader field that uses ionizing radiation to kill cancer cells, but it differs by delivering radiation from within the body rather than from an external machine. This distinction means the dose can be concentrated where it’s needed most, reducing side effects for nearby healthy tissue. The method comes in two main flavors: high‑dose‑rate (HDR) and low‑dose‑rate (LDR). In HDR, a temporary source delivers a powerful burst over minutes; in LDR, a permanently implanted seed releases a low dose over weeks or months. Both approaches share a common goal—maximize tumor control while minimizing collateral damage.
One of the most common uses is for prostate cancer, a disease where cancer cells grow in the prostate gland. Here, HDR brachytherapy can replace or complement surgery, offering similar cure rates with quicker recovery. HDR brachytherapy, the technique that uses a high‑intensity source placed temporarily is also favored for cervical cancer, a malignancy of the cervix often requiring precise dose delivery, because it can conform to the irregular shape of the tumor while shielding the bladder and rectum. Successful outcomes rely heavily on meticulous treatment planning, the process of mapping radiation dose using imaging and computer algorithms. Accurate imaging (MRI or CT) guides applicator placement, and sophisticated software calculates the optimal dose distribution. In short, effective planning influences the safety and efficacy of brachytherapy—without it, even the best technique can miss its mark.
Beyond prostate and cervical tumors, brachytherapy finds a niche in breast, skin, and head‑and‑neck cancers, where localized control is crucial. The versatility comes from a range of applicators—tiny tubes, needles, or balloons—that are chosen based on tumor location and size. Physicians also consider patient factors such as age, overall health, and previous treatments when selecting HDR versus LDR. As technology advances, real‑time imaging and robotics are making source placement even more precise, pushing the boundaries of what internal radiation can achieve. Below you’ll find a curated list of articles that dive deeper into specific drugs, comparison guides, and safety tips—all tied together by the common thread of brachytherapy and its role in modern cancer care.
