Interstitial brachytherapy

Question 1

What organs are treated with interstitial brachytherapy

Answer 1

Prostate

Breast

Cervix and Vagina - in addition to intracavitary implants.

Question 2

Prostate interstitial BT

Answer 2

14-18 seeds implanted in needles through the perineum.

Used for patients with low=medium risk tumors

Patients cannot have voiding obstructive problems and prostate should be less than 60 mL.

Four weeks after implantation it is re-imaged and the post-edema volume of prostate determined, then the total dose delivered is determined.

Question 3

Breast IBT

Answer 3

Done after tumor excision, surgical clips are left in the excised site.

The post-excision site is imaged, determining the size of the seroma.

Needles are inserted and then replaced with plastic catheters.

Another CT is taken, and then treatment plan is made and performed, and tubes are let in until it is finished.