Fig. 5
From: Overview of technical solutions and assessment of clinical usefulness of capsule endoscopy
Sayaka capsule by RF System Lab with internal control with the use of external and internal constant magnetic fields placed inside the capsule, a 3D electromagnet (with a power of 300 mW, 125 kHz operating frequency, and the size of 10 × 10 × 10 mm) b an external stationary electromagnetic field and c a portable external set of magnetic field in accordance with paper [48]