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. 2022 Mar 11;4(2):e210067. doi: 10.1148/rycan.210067

Figure 6:

Comparison of static standardized uptake value (SUV) and standard Patlak (sPatlak)–derived parametric images in a second representative participant from group A. This 81-year-old woman presented with an avidly enhancing dural-based mass along the right temporal convexity. (A) Dural-based mass with heterogeneous enhancement of the overlying calvarium concerning for intraosseous extension as presented in T1-weighted postcontrast image alone. (B) Corresponding PET and (C) PET/MRI fusion images demonstrate intense 68Ga-DOTATATE avidity within both the dural-based and the intraosseous components of the mass. (D) Static PET image from the last 10 minutes of acquisition (50–60 minutes after injection), along with (E) Patlak slope Ki and (F) Patlak intercept Vb parametric images from the same PET/MRI examination. The color bars are to maximum SUV for C and D, from 0 to maximum Ki (0–0.4 mL of reference tissue/min/grams of targeted tissue) for E, and from 0 to maximum Vb (0–11 mL of reference tissue/grams of targeted tissue) for F. DOTATATE = tetraazacyclododecane tetraacetic acid octreotate, 68Ga = gallium 68, Ki = net binding rate constant, Vb = sum of blood volume fraction and distribution volume.

Comparison of static standardized uptake value (SUV) and standard Patlak (sPatlak)–derived parametric images in a second representative participant from group A. This 81-year-old woman presented with an avidly enhancing dural-based mass along the right temporal convexity. (A) Dural-based mass with heterogeneous enhancement of the overlying calvarium concerning for intraosseous extension as presented in T1-weighted postcontrast image alone. (B) Corresponding PET and (C) PET/MRI fusion images demonstrate intense 68Ga-DOTATATE avidity within both the dural-based and the intraosseous components of the mass. (D) Static PET image from the last 10 minutes of acquisition (50–60 minutes after injection), along with (E) Patlak slope Ki and (F) Patlak intercept Vb parametric images from the same PET/MRI examination. The color bars are to maximum SUV for C and D, from 0 to maximum Ki (0–0.4 mL of reference tissue/min/grams of targeted tissue) for E, and from 0 to maximum Vb (0–11 mL of reference tissue/grams of targeted tissue) for F. DOTATATE = tetraazacyclododecane tetraacetic acid octreotate, 68Ga = gallium 68, Ki = net binding rate constant, Vb = sum of blood volume fraction and distribution volume.