Peripherally inserted central catheters, or PICC lines, are clinically used for many years in the treatment of patients, whereby the implantation occurs under x-ray/fluoroscopy. Female and male patients of legal age that have the medical indication for Power-PICC-Line catheter implantation can be screened for the study. These medical indications include the necessity of chemotherapy in the course of an oncological treatment or parenteral nutrition. The study objective is to test the efficacy and safety of the SHERLOCK system, evaluated by a monocentric, randomized-controlled study. The advantage for the participating patients lies in a reduced radiation exposure due to the discontinued final chest x-ray examination (fluoroscopy). Furthermore, the SHERLOCK system can be deployed directly on ward, at the patient's bedside leading to a cost and time saving. Recruited in- and outpatients (of legal age) with indication for Power-PICC-Line catheter implantation will be randomly assigned to one of the two arms (fluoroscopy or SHERLOCK). Depending on randomization, the Power-PICC implantation occurs either under fluoroscopy or with the SHERLOCK system. All related substances, measures or procedures are performed according to the clinical routine. The medical device is a fully integrated magnetic tracking and ECG-based peripherally inserted central catheter (PICC) tip confirmation technology applied on patients with normal sinus rhythm and placed through a peripheral vein. The Sherlock system is CE-certified since December 2011.