Computed tomography (CT) is the most frequent diagnostic procedure carried out in the Department of Radiology Military Institute of Medicine in Warsaw. In January 2013, the Institute had a hight‑definition dual energy CT system Discovery 750HD installed. Amedo – Laser Navigation System was introduced in 2015. Amedo‑LNS expanded the range of procedures with CT‑controlled biopsy, drainage and thermal ablation. A 69‑year‑old patient was admitted to the Department of General Surgery, Oncology, Metabolic and Thoracic Surgery. He had undergone a low frontal rectal resection due to tumor, with complications in form of fistula in the anastomosis and abscess in the presacral area, carried out in the ither hospital. In the CT test with intravenous contrast, the size and location of the abscess was determined and the patient was qualified for drainage. Due to poor access, the USG‑controlled drainage was abandoned. The patient underwent a successful drainage of the presacral area using the LNS. A common use of CT scanner and Amedo‑LNS enables using the CT for therapeutic activities. The LNS is an intuitive device that improves the quality of procedures. The ability to puncture at different angles is particularly useful. Such activity would be technically difficult without a navigator and requires multiple scans of the patient. The use of LNS shortens the intervention time, decreases the amount of absorbed radiation and reduces the risk of complications. Using the System requires close cooperation between a clinician and a radiologist in qualification, preparation, methodology and postoperative monitoring.