Table 4 Examples of literature estimates for short and long component of T2* derived using biexponential models, and CSF transverse relaxation rates using monoexponential models. Note that data is attributed to structures as described in the papers concerned, and the details of ROIs likely differ between reports. Brain parenchyma refers to estimates derived from (an) ROI(s) where no specific anatomic attribution was made. Values reproduced from Bartha and Menon25, Fleysher et al.26, Nagel et al.18, Blunck et al.28 and Niesporek et al.27. Abbreviations: Ref, reference; T, Tesla; TE, echo time; GM, grey matter; WM, white matter.
Structure | Ref | Field Strength (T) | TE n:range (ms) | T2*short (ms) | T2*long (ms) | ||
|---|---|---|---|---|---|---|---|
GM | WM | GM | WM | ||||
Brain Parenchyma | 4 | 10: 3.8–68.7 | — | — | 21.1 ± 0.5 | ||
7 | 2: 12–32 | — | — | 28 ± 2 | 29 ± 2 | ||
7 | 56: 0.35–55 | — | 4.7 ± 0.2 | — | 40 ± 2 | ||
7 | 38: 0.4–150 | 2.02 ± 1.67 | 1.99 ± 2.09 | 25.9 ± 8.3 | 22.4 ± 7.8 | ||
7 | 32: 0.35–85 | 5.4 ± 0.2 | 3.5 ± 0.1 | 36.4 ± 3.1 | 23.3 ± 2.6 | ||
Frontal lobe | 7 | 2: 12–32 | — | — | 27 ± 2 | 31 ± 1 | |
Prefrontal | 4 | 10: 3.8–68.7 | — | — | 21.2 ± 2.2 | 19.3 ± 2.9 | |
Occipital Lobe | 7 | 2: 12–32 | — | — | 29 ± 1 | 28 ± 1 | |
4 | 10: 3.8–68.7 | — | — | 22 ± 2.4 | — | ||
Parietal lobe | 4 | 10: 3.8–68.7 | — | — | — | 18.2 ± 1.9 | |
Insula | 4 | 10: 3.8–68.7 | — | — | 21.6 ± 1.2 | — | |
External capsule | 4 | 10: 3.8–68.7 | — | — | — | 18.3 ± 2.9 | |
Thalamus | 7 | 2: 12–32 | — | — | 32 ± 2 | — | |
4 | 10: 3.8–68.7 | — | — | 16.9 ± 2.4 | — | ||
Putamen | 7 | 2: 12–32 | — | — | 23 ± 2 | — | |
Peri-ventricle WM | 7 | 2: 12–32 | — | — | — | 34 ± 1 | |
Cerebellum | 7 | 2: 12–32 | — | — | — | 24 ± 1 | |
Splenium of CC | 7 | 2: 12–32 | — | — | — | 28 ± 2 | |
CC | 4 | 10: 3.8–68.7 | — | — | — | 22 ± 2.7 | |
CSF | 7 | 2: 12–32 | 54 ± 4 | ||||
4 | 10: 3.8–68.7 | 63.7 ± 4.7 | |||||
7 | 38: 0.4–150 | 57.2 ± 6.6 | |||||
7 | 56: 0.35–55 | 56 ± 4 | |||||
7 | 32: 0.35–85 | 46.9 ± 2.1 | |||||
