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EJNMMI Physics
Fig. 2 | EJNMMI Physics

Fig. 2

From: Cross-calibration of the Siemens mMR: easily acquired accurate PET phantom measurements, long-term stability and reproducibility

Fig. 2

The phantom used for cross-calibration scans. a The Siemens mCT water phantom of 20 cm inner diameter and axial length, 21 cm outer diameter, and 6283 ml volume. b CT scan of the phantom after conversion to linear attenuation coefficient map (μ-map). c The calculated μ-map of the water phantom supplied with the mMR. We can use the μ-map in c directly as we scan the mCT water phantom in the default position of the mMR water phantom, which is made of the same material and has the same inner and outer diameters as the mCT phantom in a but is 10 cm longer to cover the longer PET FOV of the mMR. The μ-map in c is given as a predefined μ-map in the mMR system reconstruction software (version VB20P)

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