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Figure 2 | Patient Safety in Surgery

Figure 2

From: Safety and reliability of radio frequency identification devices in magnetic resonance imaging and computed tomography

Figure 2

Quantitative image artifacts. Both RFID tags shown on the top have been placed one after the other in the middle of the plastic grid, immersed in 1 g/L CuSO4 solution. Gradient echo and Spin echo sequences as described in the ASTM Standard F2119-01 have been performed. The upper row shows MR images of a 3 mm-thick slice through the tags, the middle row slices 5 mm below the tag and the last row shows an orthogonal slice through the tag. Signal void could be found only a few millimeters away from the tag. Reduced signal due to shielding of the RF field may produce darker shadows in slices up to 1 cm away.

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Patient Safety in Surgery

ISSN: 1754-9493