Brain Pearls

Table 1

Diffusion values of normal and pathological tissues in the brain.

Normal Brain Tissue	ADC µm²/ms

Normal White Matter [107]	0.705±0.014
Deep Gray Matter [108]	0.75±0.03

Neuroepithelial Tumors	ADC µm²/ms

WHO grade I, Dysembryoplastic Neuroepithelial Tumor [18]	2.546±0.135
WHO grade I, Pilocytic Astrocytoma [18]	1.659±0.260
WHO grade II, Diffuse Astrocytoma [18]	1.530±0.148
WHO grade II, Oligodendroglioma [18]	1.455
WHO grade II, Ependymoma [18]	1.230±0.119
WHO grade III, Anaplastic Astrocytoma [18]	1.245±0.153
WHO grade III, Anaplastic Oligodendroglioma [18]	1.222±0.093
WHO grade III, Anaplastic Ependymoma [18]	1.103±0.101
WHO grade IV, Glioblastoma [18]	1.079±0.154
WHO grade IV, PNET [18]	0.835±0.122
WHO grade IV, Medulloblastoma [23]	0.66±0.15

Other Brain Tumors	ADC µm²/ms

Chraniopharyngioma [18]	1.572±0.210
Schwannoma [18]	1.384±0.140
Epidermoid [18]	1.263±0.174
Germ Cell Tumor [18]	1.189±0.175
Metastatic Tumor [18]	1.149±0.192
Pituitary Adenoma [18]	1.121±0.202
Typical Meningeoma [109]	1.17±0.21
Atypical/Malignant Meningeoma [109]	0.75±0.21
Malignant Lymphoma [18]	0.725±0.192

Secondary Changes and Other Pathologies	ADC µm²/ms

Vasogenic (Peritumoral) Edema [19]	1.30±0.11
Peritumoral Edema (High-Grade Glial Tumors) [17]	1.825±0.115
Cytotoxic (Ischemic) Edema [19]	1.04±0.05
Cystic/Necrotic Tumor Areas [38]	2.70±0.31
Abscess [38]	0.65±0.16
Acute Stroke [110]	0.401±0.143