microscintigraphy

mi·cro·scin·tig·ra·phy

(mī'krō-sin-tig'ră-fē),
Imaging of small anatomic structures by use of a radionuclide in conjunction with a special collimator which "magnifies" the image; for example, the use of technetium 99m in conjunction with a pinhole collimator to image the lacrimal drainage.
[micro- + scintigraphy]