Welcome to the home page for the threshold database. This database was designed based on the work of Don Chamberlayne and was adapted for Microsoft Access by the IACA. You can download this article which explains the concept of threshold analysis. The Threshold Database is currently available for Microsoft Access 2000-2003.
Most patients can continue many of their normal activities during radiation therapy. Each radiation therapy treatment takes about 10 minutes. Radiation therapy to try and cure cancer is usually delivered daily, Monday through Friday, for about five to eight weeks. Weekend breaks allow normal cells to recover. Shorter durations of radiation therapy may be used to relieve symptoms.
LDR was once the only type of brachytherapy available. In this type of brachytherapy, the source of radiation stays in place for one to seven days. Most patients are hospitalized for the duration of this treatment, and once the treatment is completed, the radiation source is removed. High Dose Rate (HDR) Implants. During HDR brachytherapy, the radiation source is in place for 10 to 20 minute periods and then removed. Depending on cancer type, HDR treatments may occur once or twice a day for two to five days or once a week for two to five weeks.