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Fig. 2 | EJNMMI Physics

Fig. 2

From: CT protocol optimisation in PET/CT: a systematic review

Fig. 2

Distributions of CTDIvol values for each protocol intent. a CT acquisition for anatomic localization and attenuation correction. b CT acquisition for attenuation correction only (ULTRA-low dose). c CT acquisition for diagnostic purposes and attenuation correction without contrast and C_contrast CT acquisition for diagnostic purposes and attenuation correction with contrast. In particular, only protocol intent C included also data about the CTDIvol values of the x-ray contrast medium examinations. The error bars of protocol intent C are wider than the A and B protocols due to their intrinsic diagnostic nature. CTDIvol values for protocol intents A and B were statistically different from protocol intent C (p = 0.002); in addition, CTDIvol values were statistically different for protocol intents C and C_contrast (p = 0.009)

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