The idea that assessment is intrinsic to effective instruction is traced from early experiments in the individualization of learning through the work of Benjamin Bloom to reviews of the impact of feedback on learners in classrooms.
Incidental hypervascular lesions are also very common findings in liver imaging. It is important to differentiate between 'touch' and 'don't touch' lesions. Benign 'don't touch' hypervascular tumors include hemangioma, FNH and small adenomas.
Figure 9:A T1-weighted sagittal image in a 63 year-old male with an enlarging foot mass reveals a subcutaneous lesion (arrows) which extends from subcutaneous fat into foot musculature. The abnormality is similar to fat signal but heterogeneous with areas of internal nodularity.